@hotwired/turbo/dist/turbo.es2017-umd.js

/*!
Turbo 8.0.4
Copyright © 2024 37signals LLC
 */
(function (global, factory) {
  typeof exports === 'object' && typeof module !== 'undefined' ? factory(exports) :
  typeof define === 'function' && define.amd ? define(['exports'], factory) :
  (global = typeof globalThis !== 'undefined' ? globalThis : global || self, factory(global.Turbo = {}));
})(this, (function (exports) { 'use strict';

  /**
   * The MIT License (MIT)
   *
   * Copyright (c) 2019 Javan Makhmali
   *
   * Permission is hereby granted, free of charge, to any person obtaining a copy
   * of this software and associated documentation files (the "Software"), to deal
   * in the Software without restriction, including without limitation the rights
   * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
   * copies of the Software, and to permit persons to whom the Software is
   * furnished to do so, subject to the following conditions:
   *
   * The above copyright notice and this permission notice shall be included in
   * all copies or substantial portions of the Software.
   *
   * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
   * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
   * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
   * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
   * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
   * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
   * THE SOFTWARE.
   */

  (function (prototype) {
    if (typeof prototype.requestSubmit == "function") return

    prototype.requestSubmit = function (submitter) {
      if (submitter) {
        validateSubmitter(submitter, this);
        submitter.click();
      } else {
        submitter = document.createElement("input");
        submitter.type = "submit";
        submitter.hidden = true;
        this.appendChild(submitter);
        submitter.click();
        this.removeChild(submitter);
      }
    };

    function validateSubmitter(submitter, form) {
      submitter instanceof HTMLElement || raise(TypeError, "parameter 1 is not of type 'HTMLElement'");
      submitter.type == "submit" || raise(TypeError, "The specified element is not a submit button");
      submitter.form == form ||
        raise(DOMException, "The specified element is not owned by this form element", "NotFoundError");
    }

    function raise(errorConstructor, message, name) {
      throw new errorConstructor("Failed to execute 'requestSubmit' on 'HTMLFormElement': " + message + ".", name)
    }
  })(HTMLFormElement.prototype);

  const submittersByForm = new WeakMap();

  function findSubmitterFromClickTarget(target) {
    const element = target instanceof Element ? target : target instanceof Node ? target.parentElement : null;
    const candidate = element ? element.closest("input, button") : null;
    return candidate?.type == "submit" ? candidate : null
  }

  function clickCaptured(event) {
    const submitter = findSubmitterFromClickTarget(event.target);

    if (submitter && submitter.form) {
      submittersByForm.set(submitter.form, submitter);
    }
  }

  (function () {
    if ("submitter" in Event.prototype) return

    let prototype = window.Event.prototype;
    // Certain versions of Safari 15 have a bug where they won't
    // populate the submitter. This hurts TurboDrive's enable/disable detection.
    // See https://bugs.webkit.org/show_bug.cgi?id=229660
    if ("SubmitEvent" in window) {
      const prototypeOfSubmitEvent = window.SubmitEvent.prototype;

      if (/Apple Computer/.test(navigator.vendor) && !("submitter" in prototypeOfSubmitEvent)) {
        prototype = prototypeOfSubmitEvent;
      } else {
        return // polyfill not needed
      }
    }

    addEventListener("click", clickCaptured, true);

    Object.defineProperty(prototype, "submitter", {
      get() {
        if (this.type == "submit" && this.target instanceof HTMLFormElement) {
          return submittersByForm.get(this.target)
        }
      }
    });
  })();

  const FrameLoadingStyle = {
    eager: "eager",
    lazy: "lazy"
  };

  /**
   * Contains a fragment of HTML which is updated based on navigation within
   * it (e.g. via links or form submissions).
   *
   * @customElement turbo-frame
   * @example
   *   <turbo-frame id="messages">
   *     <a href="/messages/expanded">
   *       Show all expanded messages in this frame.
   *     </a>
   *
   *     <form action="/messages">
   *       Show response from this form within this frame.
   *     </form>
   *   </turbo-frame>
   */
  class FrameElement extends HTMLElement {
    static delegateConstructor = undefined

    loaded = Promise.resolve()

    static get observedAttributes() {
      return ["disabled", "loading", "src"]
    }

    constructor() {
      super();
      this.delegate = new FrameElement.delegateConstructor(this);
    }

    connectedCallback() {
      this.delegate.connect();
    }

    disconnectedCallback() {
      this.delegate.disconnect();
    }

    reload() {
      return this.delegate.sourceURLReloaded()
    }

    attributeChangedCallback(name) {
      if (name == "loading") {
        this.delegate.loadingStyleChanged();
      } else if (name == "src") {
        this.delegate.sourceURLChanged();
      } else if (name == "disabled") {
        this.delegate.disabledChanged();
      }
    }

    /**
     * Gets the URL to lazily load source HTML from
     */
    get src() {
      return this.getAttribute("src")
    }

    /**
     * Sets the URL to lazily load source HTML from
     */
    set src(value) {
      if (value) {
        this.setAttribute("src", value);
      } else {
        this.removeAttribute("src");
      }
    }

    /**
     * Gets the refresh mode for the frame.
     */
    get refresh() {
      return this.getAttribute("refresh")
    }

    /**
     * Sets the refresh mode for the frame.
     */
    set refresh(value) {
      if (value) {
        this.setAttribute("refresh", value);
      } else {
        this.removeAttribute("refresh");
      }
    }

    /**
     * Determines if the element is loading
     */
    get loading() {
      return frameLoadingStyleFromString(this.getAttribute("loading") || "")
    }

    /**
     * Sets the value of if the element is loading
     */
    set loading(value) {
      if (value) {
        this.setAttribute("loading", value);
      } else {
        this.removeAttribute("loading");
      }
    }

    /**
     * Gets the disabled state of the frame.
     *
     * If disabled, no requests will be intercepted by the frame.
     */
    get disabled() {
      return this.hasAttribute("disabled")
    }

    /**
     * Sets the disabled state of the frame.
     *
     * If disabled, no requests will be intercepted by the frame.
     */
    set disabled(value) {
      if (value) {
        this.setAttribute("disabled", "");
      } else {
        this.removeAttribute("disabled");
      }
    }

    /**
     * Gets the autoscroll state of the frame.
     *
     * If true, the frame will be scrolled into view automatically on update.
     */
    get autoscroll() {
      return this.hasAttribute("autoscroll")
    }

    /**
     * Sets the autoscroll state of the frame.
     *
     * If true, the frame will be scrolled into view automatically on update.
     */
    set autoscroll(value) {
      if (value) {
        this.setAttribute("autoscroll", "");
      } else {
        this.removeAttribute("autoscroll");
      }
    }

    /**
     * Determines if the element has finished loading
     */
    get complete() {
      return !this.delegate.isLoading
    }

    /**
     * Gets the active state of the frame.
     *
     * If inactive, source changes will not be observed.
     */
    get isActive() {
      return this.ownerDocument === document && !this.isPreview
    }

    /**
     * Sets the active state of the frame.
     *
     * If inactive, source changes will not be observed.
     */
    get isPreview() {
      return this.ownerDocument?.documentElement?.hasAttribute("data-turbo-preview")
    }
  }

  function frameLoadingStyleFromString(style) {
    switch (style.toLowerCase()) {
      case "lazy":
        return FrameLoadingStyle.lazy
      default:
        return FrameLoadingStyle.eager
    }
  }

  function expandURL(locatable) {
    return new URL(locatable.toString(), document.baseURI)
  }

  function getAnchor(url) {
    let anchorMatch;
    if (url.hash) {
      return url.hash.slice(1)
      // eslint-disable-next-line no-cond-assign
    } else if ((anchorMatch = url.href.match(/#(.*)$/))) {
      return anchorMatch[1]
    }
  }

  function getAction$1(form, submitter) {
    const action = submitter?.getAttribute("formaction") || form.getAttribute("action") || form.action;

    return expandURL(action)
  }

  function getExtension(url) {
    return (getLastPathComponent(url).match(/\.[^.]*$/) || [])[0] || ""
  }

  function isHTML(url) {
    return !!getExtension(url).match(/^(?:|\.(?:htm|html|xhtml|php))$/)
  }

  function isPrefixedBy(baseURL, url) {
    const prefix = getPrefix(url);
    return baseURL.href === expandURL(prefix).href || baseURL.href.startsWith(prefix)
  }

  function locationIsVisitable(location, rootLocation) {
    return isPrefixedBy(location, rootLocation) && isHTML(location)
  }

  function getRequestURL(url) {
    const anchor = getAnchor(url);
    return anchor != null ? url.href.slice(0, -(anchor.length + 1)) : url.href
  }

  function toCacheKey(url) {
    return getRequestURL(url)
  }

  function urlsAreEqual(left, right) {
    return expandURL(left).href == expandURL(right).href
  }

  function getPathComponents(url) {
    return url.pathname.split("/").slice(1)
  }

  function getLastPathComponent(url) {
    return getPathComponents(url).slice(-1)[0]
  }

  function getPrefix(url) {
    return addTrailingSlash(url.origin + url.pathname)
  }

  function addTrailingSlash(value) {
    return value.endsWith("/") ? value : value + "/"
  }

  class FetchResponse {
    constructor(response) {
      this.response = response;
    }

    get succeeded() {
      return this.response.ok
    }

    get failed() {
      return !this.succeeded
    }

    get clientError() {
      return this.statusCode >= 400 && this.statusCode <= 499
    }

    get serverError() {
      return this.statusCode >= 500 && this.statusCode <= 599
    }

    get redirected() {
      return this.response.redirected
    }

    get location() {
      return expandURL(this.response.url)
    }

    get isHTML() {
      return this.contentType && this.contentType.match(/^(?:text\/([^\s;,]+\b)?html|application\/xhtml\+xml)\b/)
    }

    get statusCode() {
      return this.response.status
    }

    get contentType() {
      return this.header("Content-Type")
    }

    get responseText() {
      return this.response.clone().text()
    }

    get responseHTML() {
      if (this.isHTML) {
        return this.response.clone().text()
      } else {
        return Promise.resolve(undefined)
      }
    }

    header(name) {
      return this.response.headers.get(name)
    }
  }

  function activateScriptElement(element) {
    if (element.getAttribute("data-turbo-eval") == "false") {
      return element
    } else {
      const createdScriptElement = document.createElement("script");
      const cspNonce = getMetaContent("csp-nonce");
      if (cspNonce) {
        createdScriptElement.nonce = cspNonce;
      }
      createdScriptElement.textContent = element.textContent;
      createdScriptElement.async = false;
      copyElementAttributes(createdScriptElement, element);
      return createdScriptElement
    }
  }

  function copyElementAttributes(destinationElement, sourceElement) {
    for (const { name, value } of sourceElement.attributes) {
      destinationElement.setAttribute(name, value);
    }
  }

  function createDocumentFragment(html) {
    const template = document.createElement("template");
    template.innerHTML = html;
    return template.content
  }

  function dispatch(eventName, { target, cancelable, detail } = {}) {
    const event = new CustomEvent(eventName, {
      cancelable,
      bubbles: true,
      composed: true,
      detail
    });

    if (target && target.isConnected) {
      target.dispatchEvent(event);
    } else {
      document.documentElement.dispatchEvent(event);
    }

    return event
  }

  function nextRepaint() {
    if (document.visibilityState === "hidden") {
      return nextEventLoopTick()
    } else {
      return nextAnimationFrame()
    }
  }

  function nextAnimationFrame() {
    return new Promise((resolve) => requestAnimationFrame(() => resolve()))
  }

  function nextEventLoopTick() {
    return new Promise((resolve) => setTimeout(() => resolve(), 0))
  }

  function nextMicrotask() {
    return Promise.resolve()
  }

  function parseHTMLDocument(html = "") {
    return new DOMParser().parseFromString(html, "text/html")
  }

  function unindent(strings, ...values) {
    const lines = interpolate(strings, values).replace(/^\n/, "").split("\n");
    const match = lines[0].match(/^\s+/);
    const indent = match ? match[0].length : 0;
    return lines.map((line) => line.slice(indent)).join("\n")
  }

  function interpolate(strings, values) {
    return strings.reduce((result, string, i) => {
      const value = values[i] == undefined ? "" : values[i];
      return result + string + value
    }, "")
  }

  function uuid() {
    return Array.from({ length: 36 })
      .map((_, i) => {
        if (i == 8 || i == 13 || i == 18 || i == 23) {
          return "-"
        } else if (i == 14) {
          return "4"
        } else if (i == 19) {
          return (Math.floor(Math.random() * 4) + 8).toString(16)
        } else {
          return Math.floor(Math.random() * 15).toString(16)
        }
      })
      .join("")
  }

  function getAttribute(attributeName, ...elements) {
    for (const value of elements.map((element) => element?.getAttribute(attributeName))) {
      if (typeof value == "string") return value
    }

    return null
  }

  function hasAttribute(attributeName, ...elements) {
    return elements.some((element) => element && element.hasAttribute(attributeName))
  }

  function markAsBusy(...elements) {
    for (const element of elements) {
      if (element.localName == "turbo-frame") {
        element.setAttribute("busy", "");
      }
      element.setAttribute("aria-busy", "true");
    }
  }

  function clearBusyState(...elements) {
    for (const element of elements) {
      if (element.localName == "turbo-frame") {
        element.removeAttribute("busy");
      }

      element.removeAttribute("aria-busy");
    }
  }

  function waitForLoad(element, timeoutInMilliseconds = 2000) {
    return new Promise((resolve) => {
      const onComplete = () => {
        element.removeEventListener("error", onComplete);
        element.removeEventListener("load", onComplete);
        resolve();
      };

      element.addEventListener("load", onComplete, { once: true });
      element.addEventListener("error", onComplete, { once: true });
      setTimeout(resolve, timeoutInMilliseconds);
    })
  }

  function getHistoryMethodForAction(action) {
    switch (action) {
      case "replace":
        return history.replaceState
      case "advance":
      case "restore":
        return history.pushState
    }
  }

  function isAction(action) {
    return action == "advance" || action == "replace" || action == "restore"
  }

  function getVisitAction(...elements) {
    const action = getAttribute("data-turbo-action", ...elements);

    return isAction(action) ? action : null
  }

  function getMetaElement(name) {
    return document.querySelector(`meta[name="${name}"]`)
  }

  function getMetaContent(name) {
    const element = getMetaElement(name);
    return element && element.content
  }

  function setMetaContent(name, content) {
    let element = getMetaElement(name);

    if (!element) {
      element = document.createElement("meta");
      element.setAttribute("name", name);

      document.head.appendChild(element);
    }

    element.setAttribute("content", content);

    return element
  }

  function findClosestRecursively(element, selector) {
    if (element instanceof Element) {
      return (
        element.closest(selector) || findClosestRecursively(element.assignedSlot || element.getRootNode()?.host, selector)
      )
    }
  }

  function elementIsFocusable(element) {
    const inertDisabledOrHidden = "[inert], :disabled, [hidden], details:not([open]), dialog:not([open])";

    return !!element && element.closest(inertDisabledOrHidden) == null && typeof element.focus == "function"
  }

  function queryAutofocusableElement(elementOrDocumentFragment) {
    return Array.from(elementOrDocumentFragment.querySelectorAll("[autofocus]")).find(elementIsFocusable)
  }

  async function around(callback, reader) {
    const before = reader();

    callback();

    await nextAnimationFrame();

    const after = reader();

    return [before, after]
  }

  function doesNotTargetIFrame(anchor) {
    if (anchor.hasAttribute("target")) {
      for (const element of document.getElementsByName(anchor.target)) {
        if (element instanceof HTMLIFrameElement) return false
      }
    }

    return true
  }

  function findLinkFromClickTarget(target) {
    return findClosestRecursively(target, "a[href]:not([target^=_]):not([download])")
  }

  function getLocationForLink(link) {
    return expandURL(link.getAttribute("href") || "")
  }

  function debounce(fn, delay) {
    let timeoutId = null;

    return (...args) => {
      const callback = () => fn.apply(this, args);
      clearTimeout(timeoutId);
      timeoutId = setTimeout(callback, delay);
    }
  }

  class LimitedSet extends Set {
    constructor(maxSize) {
      super();
      this.maxSize = maxSize;
    }

    add(value) {
      if (this.size >= this.maxSize) {
        const iterator = this.values();
        const oldestValue = iterator.next().value;
        this.delete(oldestValue);
      }
      super.add(value);
    }
  }

  const recentRequests = new LimitedSet(20);

  const nativeFetch = window.fetch;

  function fetchWithTurboHeaders(url, options = {}) {
    const modifiedHeaders = new Headers(options.headers || {});
    const requestUID = uuid();
    recentRequests.add(requestUID);
    modifiedHeaders.append("X-Turbo-Request-Id", requestUID);

    return nativeFetch(url, {
      ...options,
      headers: modifiedHeaders
    })
  }

  function fetchMethodFromString(method) {
    switch (method.toLowerCase()) {
      case "get":
        return FetchMethod.get
      case "post":
        return FetchMethod.post
      case "put":
        return FetchMethod.put
      case "patch":
        return FetchMethod.patch
      case "delete":
        return FetchMethod.delete
    }
  }

  const FetchMethod = {
    get: "get",
    post: "post",
    put: "put",
    patch: "patch",
    delete: "delete"
  };

  function fetchEnctypeFromString(encoding) {
    switch (encoding.toLowerCase()) {
      case FetchEnctype.multipart:
        return FetchEnctype.multipart
      case FetchEnctype.plain:
        return FetchEnctype.plain
      default:
        return FetchEnctype.urlEncoded
    }
  }

  const FetchEnctype = {
    urlEncoded: "application/x-www-form-urlencoded",
    multipart: "multipart/form-data",
    plain: "text/plain"
  };

  class FetchRequest {
    abortController = new AbortController()
    #resolveRequestPromise = (_value) => {}

    constructor(delegate, method, location, requestBody = new URLSearchParams(), target = null, enctype = FetchEnctype.urlEncoded) {
      const [url, body] = buildResourceAndBody(expandURL(location), method, requestBody, enctype);

      this.delegate = delegate;
      this.url = url;
      this.target = target;
      this.fetchOptions = {
        credentials: "same-origin",
        redirect: "follow",
        method: method,
        headers: { ...this.defaultHeaders },
        body: body,
        signal: this.abortSignal,
        referrer: this.delegate.referrer?.href
      };
      this.enctype = enctype;
    }

    get method() {
      return this.fetchOptions.method
    }

    set method(value) {
      const fetchBody = this.isSafe ? this.url.searchParams : this.fetchOptions.body || new FormData();
      const fetchMethod = fetchMethodFromString(value) || FetchMethod.get;

      this.url.search = "";

      const [url, body] = buildResourceAndBody(this.url, fetchMethod, fetchBody, this.enctype);

      this.url = url;
      this.fetchOptions.body = body;
      this.fetchOptions.method = fetchMethod;
    }

    get headers() {
      return this.fetchOptions.headers
    }

    set headers(value) {
      this.fetchOptions.headers = value;
    }

    get body() {
      if (this.isSafe) {
        return this.url.searchParams
      } else {
        return this.fetchOptions.body
      }
    }

    set body(value) {
      this.fetchOptions.body = value;
    }

    get location() {
      return this.url
    }

    get params() {
      return this.url.searchParams
    }

    get entries() {
      return this.body ? Array.from(this.body.entries()) : []
    }

    cancel() {
      this.abortController.abort();
    }

    async perform() {
      const { fetchOptions } = this;
      this.delegate.prepareRequest(this);
      const event = await this.#allowRequestToBeIntercepted(fetchOptions);
      try {
        this.delegate.requestStarted(this);

        if (event.detail.fetchRequest) {
          this.response = event.detail.fetchRequest.response;
        } else {
          this.response = fetchWithTurboHeaders(this.url.href, fetchOptions);
        }

        const response = await this.response;
        return await this.receive(response)
      } catch (error) {
        if (error.name !== "AbortError") {
          if (this.#willDelegateErrorHandling(error)) {
            this.delegate.requestErrored(this, error);
          }
          throw error
        }
      } finally {
        this.delegate.requestFinished(this);
      }
    }

    async receive(response) {
      const fetchResponse = new FetchResponse(response);
      const event = dispatch("turbo:before-fetch-response", {
        cancelable: true,
        detail: { fetchResponse },
        target: this.target
      });
      if (event.defaultPrevented) {
        this.delegate.requestPreventedHandlingResponse(this, fetchResponse);
      } else if (fetchResponse.succeeded) {
        this.delegate.requestSucceededWithResponse(this, fetchResponse);
      } else {
        this.delegate.requestFailedWithResponse(this, fetchResponse);
      }
      return fetchResponse
    }

    get defaultHeaders() {
      return {
        Accept: "text/html, application/xhtml+xml"
      }
    }

    get isSafe() {
      return isSafe(this.method)
    }

    get abortSignal() {
      return this.abortController.signal
    }

    acceptResponseType(mimeType) {
      this.headers["Accept"] = [mimeType, this.headers["Accept"]].join(", ");
    }

    async #allowRequestToBeIntercepted(fetchOptions) {
      const requestInterception = new Promise((resolve) => (this.#resolveRequestPromise = resolve));
      const event = dispatch("turbo:before-fetch-request", {
        cancelable: true,
        detail: {
          fetchOptions,
          url: this.url,
          resume: this.#resolveRequestPromise
        },
        target: this.target
      });
      this.url = event.detail.url;
      if (event.defaultPrevented) await requestInterception;

      return event
    }

    #willDelegateErrorHandling(error) {
      const event = dispatch("turbo:fetch-request-error", {
        target: this.target,
        cancelable: true,
        detail: { request: this, error: error }
      });

      return !event.defaultPrevented
    }
  }

  function isSafe(fetchMethod) {
    return fetchMethodFromString(fetchMethod) == FetchMethod.get
  }

  function buildResourceAndBody(resource, method, requestBody, enctype) {
    const searchParams =
      Array.from(requestBody).length > 0 ? new URLSearchParams(entriesExcludingFiles(requestBody)) : resource.searchParams;

    if (isSafe(method)) {
      return [mergeIntoURLSearchParams(resource, searchParams), null]
    } else if (enctype == FetchEnctype.urlEncoded) {
      return [resource, searchParams]
    } else {
      return [resource, requestBody]
    }
  }

  function entriesExcludingFiles(requestBody) {
    const entries = [];

    for (const [name, value] of requestBody) {
      if (value instanceof File) continue
      else entries.push([name, value]);
    }

    return entries
  }

  function mergeIntoURLSearchParams(url, requestBody) {
    const searchParams = new URLSearchParams(entriesExcludingFiles(requestBody));

    url.search = searchParams.toString();

    return url
  }

  class AppearanceObserver {
    started = false

    constructor(delegate, element) {
      this.delegate = delegate;
      this.element = element;
      this.intersectionObserver = new IntersectionObserver(this.intersect);
    }

    start() {
      if (!this.started) {
        this.started = true;
        this.intersectionObserver.observe(this.element);
      }
    }

    stop() {
      if (this.started) {
        this.started = false;
        this.intersectionObserver.unobserve(this.element);
      }
    }

    intersect = (entries) => {
      const lastEntry = entries.slice(-1)[0];
      if (lastEntry?.isIntersecting) {
        this.delegate.elementAppearedInViewport(this.element);
      }
    }
  }

  class StreamMessage {
    static contentType = "text/vnd.turbo-stream.html"

    static wrap(message) {
      if (typeof message == "string") {
        return new this(createDocumentFragment(message))
      } else {
        return message
      }
    }

    constructor(fragment) {
      this.fragment = importStreamElements(fragment);
    }
  }

  function importStreamElements(fragment) {
    for (const element of fragment.querySelectorAll("turbo-stream")) {
      const streamElement = document.importNode(element, true);

      for (const inertScriptElement of streamElement.templateElement.content.querySelectorAll("script")) {
        inertScriptElement.replaceWith(activateScriptElement(inertScriptElement));
      }

      element.replaceWith(streamElement);
    }

    return fragment
  }

  const PREFETCH_DELAY = 100;

  class PrefetchCache {
    #prefetchTimeout = null
    #prefetched = null

    get(url) {
      if (this.#prefetched && this.#prefetched.url === url && this.#prefetched.expire > Date.now()) {
        return this.#prefetched.request
      }
    }

    setLater(url, request, ttl) {
      this.clear();

      this.#prefetchTimeout = setTimeout(() => {
        request.perform();
        this.set(url, request, ttl);
        this.#prefetchTimeout = null;
      }, PREFETCH_DELAY);
    }

    set(url, request, ttl) {
      this.#prefetched = { url, request, expire: new Date(new Date().getTime() + ttl) };
    }

    clear() {
      if (this.#prefetchTimeout) clearTimeout(this.#prefetchTimeout);
      this.#prefetched = null;
    }
  }

  const cacheTtl = 10 * 1000;
  const prefetchCache = new PrefetchCache();

  const FormSubmissionState = {
    initialized: "initialized",
    requesting: "requesting",
    waiting: "waiting",
    receiving: "receiving",
    stopping: "stopping",
    stopped: "stopped"
  };

  class FormSubmission {
    state = FormSubmissionState.initialized

    static confirmMethod(message, _element, _submitter) {
      return Promise.resolve(confirm(message))
    }

    constructor(delegate, formElement, submitter, mustRedirect = false) {
      const method = getMethod(formElement, submitter);
      const action = getAction(getFormAction(formElement, submitter), method);
      const body = buildFormData(formElement, submitter);
      const enctype = getEnctype(formElement, submitter);

      this.delegate = delegate;
      this.formElement = formElement;
      this.submitter = submitter;
      this.fetchRequest = new FetchRequest(this, method, action, body, formElement, enctype);
      this.mustRedirect = mustRedirect;
    }

    get method() {
      return this.fetchRequest.method
    }

    set method(value) {
      this.fetchRequest.method = value;
    }

    get action() {
      return this.fetchRequest.url.toString()
    }

    set action(value) {
      this.fetchRequest.url = expandURL(value);
    }

    get body() {
      return this.fetchRequest.body
    }

    get enctype() {
      return this.fetchRequest.enctype
    }

    get isSafe() {
      return this.fetchRequest.isSafe
    }

    get location() {
      return this.fetchRequest.url
    }

    // The submission process

    async start() {
      const { initialized, requesting } = FormSubmissionState;
      const confirmationMessage = getAttribute("data-turbo-confirm", this.submitter, this.formElement);

      if (typeof confirmationMessage === "string") {
        const answer = await FormSubmission.confirmMethod(confirmationMessage, this.formElement, this.submitter);
        if (!answer) {
          return
        }
      }

      if (this.state == initialized) {
        this.state = requesting;
        return this.fetchRequest.perform()
      }
    }

    stop() {
      const { stopping, stopped } = FormSubmissionState;
      if (this.state != stopping && this.state != stopped) {
        this.state = stopping;
        this.fetchRequest.cancel();
        return true
      }
    }

    // Fetch request delegate

    prepareRequest(request) {
      if (!request.isSafe) {
        const token = getCookieValue(getMetaContent("csrf-param")) || getMetaContent("csrf-token");
        if (token) {
          request.headers["X-CSRF-Token"] = token;
        }
      }

      if (this.requestAcceptsTurboStreamResponse(request)) {
        request.acceptResponseType(StreamMessage.contentType);
      }
    }

    requestStarted(_request) {
      this.state = FormSubmissionState.waiting;
      this.submitter?.setAttribute("disabled", "");
      this.setSubmitsWith();
      markAsBusy(this.formElement);
      dispatch("turbo:submit-start", {
        target: this.formElement,
        detail: { formSubmission: this }
      });
      this.delegate.formSubmissionStarted(this);
    }

    requestPreventedHandlingResponse(request, response) {
      prefetchCache.clear();

      this.result = { success: response.succeeded, fetchResponse: response };
    }

    requestSucceededWithResponse(request, response) {
      if (response.clientError || response.serverError) {
        this.delegate.formSubmissionFailedWithResponse(this, response);
        return
      }

      prefetchCache.clear();

      if (this.requestMustRedirect(request) && responseSucceededWithoutRedirect(response)) {
        const error = new Error("Form responses must redirect to another location");
        this.delegate.formSubmissionErrored(this, error);
      } else {
        this.state = FormSubmissionState.receiving;
        this.result = { success: true, fetchResponse: response };
        this.delegate.formSubmissionSucceededWithResponse(this, response);
      }
    }

    requestFailedWithResponse(request, response) {
      this.result = { success: false, fetchResponse: response };
      this.delegate.formSubmissionFailedWithResponse(this, response);
    }

    requestErrored(request, error) {
      this.result = { success: false, error };
      this.delegate.formSubmissionErrored(this, error);
    }

    requestFinished(_request) {
      this.state = FormSubmissionState.stopped;
      this.submitter?.removeAttribute("disabled");
      this.resetSubmitterText();
      clearBusyState(this.formElement);
      dispatch("turbo:submit-end", {
        target: this.formElement,
        detail: { formSubmission: this, ...this.result }
      });
      this.delegate.formSubmissionFinished(this);
    }

    // Private

    setSubmitsWith() {
      if (!this.submitter || !this.submitsWith) return

      if (this.submitter.matches("button")) {
        this.originalSubmitText = this.submitter.innerHTML;
        this.submitter.innerHTML = this.submitsWith;
      } else if (this.submitter.matches("input")) {
        const input = this.submitter;
        this.originalSubmitText = input.value;
        input.value = this.submitsWith;
      }
    }

    resetSubmitterText() {
      if (!this.submitter || !this.originalSubmitText) return

      if (this.submitter.matches("button")) {
        this.submitter.innerHTML = this.originalSubmitText;
      } else if (this.submitter.matches("input")) {
        const input = this.submitter;
        input.value = this.originalSubmitText;
      }
    }

    requestMustRedirect(request) {
      return !request.isSafe && this.mustRedirect
    }

    requestAcceptsTurboStreamResponse(request) {
      return !request.isSafe || hasAttribute("data-turbo-stream", this.submitter, this.formElement)
    }

    get submitsWith() {
      return this.submitter?.getAttribute("data-turbo-submits-with")
    }
  }

  function buildFormData(formElement, submitter) {
    const formData = new FormData(formElement);
    const name = submitter?.getAttribute("name");
    const value = submitter?.getAttribute("value");

    if (name) {
      formData.append(name, value || "");
    }

    return formData
  }

  function getCookieValue(cookieName) {
    if (cookieName != null) {
      const cookies = document.cookie ? document.cookie.split("; ") : [];
      const cookie = cookies.find((cookie) => cookie.startsWith(cookieName));
      if (cookie) {
        const value = cookie.split("=").slice(1).join("=");
        return value ? decodeURIComponent(value) : undefined
      }
    }
  }

  function responseSucceededWithoutRedirect(response) {
    return response.statusCode == 200 && !response.redirected
  }

  function getFormAction(formElement, submitter) {
    const formElementAction = typeof formElement.action === "string" ? formElement.action : null;

    if (submitter?.hasAttribute("formaction")) {
      return submitter.getAttribute("formaction") || ""
    } else {
      return formElement.getAttribute("action") || formElementAction || ""
    }
  }

  function getAction(formAction, fetchMethod) {
    const action = expandURL(formAction);

    if (isSafe(fetchMethod)) {
      action.search = "";
    }

    return action
  }

  function getMethod(formElement, submitter) {
    const method = submitter?.getAttribute("formmethod") || formElement.getAttribute("method") || "";
    return fetchMethodFromString(method.toLowerCase()) || FetchMethod.get
  }

  function getEnctype(formElement, submitter) {
    return fetchEnctypeFromString(submitter?.getAttribute("formenctype") || formElement.enctype)
  }

  class Snapshot {
    constructor(element) {
      this.element = element;
    }

    get activeElement() {
      return this.element.ownerDocument.activeElement
    }

    get children() {
      return [...this.element.children]
    }

    hasAnchor(anchor) {
      return this.getElementForAnchor(anchor) != null
    }

    getElementForAnchor(anchor) {
      return anchor ? this.element.querySelector(`[id='${anchor}'], a[name='${anchor}']`) : null
    }

    get isConnected() {
      return this.element.isConnected
    }

    get firstAutofocusableElement() {
      return queryAutofocusableElement(this.element)
    }

    get permanentElements() {
      return queryPermanentElementsAll(this.element)
    }

    getPermanentElementById(id) {
      return getPermanentElementById(this.element, id)
    }

    getPermanentElementMapForSnapshot(snapshot) {
      const permanentElementMap = {};

      for (const currentPermanentElement of this.permanentElements) {
        const { id } = currentPermanentElement;
        const newPermanentElement = snapshot.getPermanentElementById(id);
        if (newPermanentElement) {
          permanentElementMap[id] = [currentPermanentElement, newPermanentElement];
        }
      }

      return permanentElementMap
    }
  }

  function getPermanentElementById(node, id) {
    return node.querySelector(`#${id}[data-turbo-permanent]`)
  }

  function queryPermanentElementsAll(node) {
    return node.querySelectorAll("[id][data-turbo-permanent]")
  }

  class FormSubmitObserver {
    started = false

    constructor(delegate, eventTarget) {
      this.delegate = delegate;
      this.eventTarget = eventTarget;
    }

    start() {
      if (!this.started) {
        this.eventTarget.addEventListener("submit", this.submitCaptured, true);
        this.started = true;
      }
    }

    stop() {
      if (this.started) {
        this.eventTarget.removeEventListener("submit", this.submitCaptured, true);
        this.started = false;
      }
    }

    submitCaptured = () => {
      this.eventTarget.removeEventListener("submit", this.submitBubbled, false);
      this.eventTarget.addEventListener("submit", this.submitBubbled, false);
    }

    submitBubbled = (event) => {
      if (!event.defaultPrevented) {
        const form = event.target instanceof HTMLFormElement ? event.target : undefined;
        const submitter = event.submitter || undefined;

        if (
          form &&
          submissionDoesNotDismissDialog(form, submitter) &&
          submissionDoesNotTargetIFrame(form, submitter) &&
          this.delegate.willSubmitForm(form, submitter)
        ) {
          event.preventDefault();
          event.stopImmediatePropagation();
          this.delegate.formSubmitted(form, submitter);
        }
      }
    }
  }

  function submissionDoesNotDismissDialog(form, submitter) {
    const method = submitter?.getAttribute("formmethod") || form.getAttribute("method");

    return method != "dialog"
  }

  function submissionDoesNotTargetIFrame(form, submitter) {
    if (submitter?.hasAttribute("formtarget") || form.hasAttribute("target")) {
      const target = submitter?.getAttribute("formtarget") || form.target;

      for (const element of document.getElementsByName(target)) {
        if (element instanceof HTMLIFrameElement) return false
      }

      return true
    } else {
      return true
    }
  }

  class View {
    #resolveRenderPromise = (_value) => {}
    #resolveInterceptionPromise = (_value) => {}

    constructor(delegate, element) {
      this.delegate = delegate;
      this.element = element;
    }

    // Scrolling

    scrollToAnchor(anchor) {
      const element = this.snapshot.getElementForAnchor(anchor);
      if (element) {
        this.scrollToElement(element);
        this.focusElement(element);
      } else {
        this.scrollToPosition({ x: 0, y: 0 });
      }
    }

    scrollToAnchorFromLocation(location) {
      this.scrollToAnchor(getAnchor(location));
    }

    scrollToElement(element) {
      element.scrollIntoView();
    }

    focusElement(element) {
      if (element instanceof HTMLElement) {
        if (element.hasAttribute("tabindex")) {
          element.focus();
        } else {
          element.setAttribute("tabindex", "-1");
          element.focus();
          element.removeAttribute("tabindex");
        }
      }
    }

    scrollToPosition({ x, y }) {
      this.scrollRoot.scrollTo(x, y);
    }

    scrollToTop() {
      this.scrollToPosition({ x: 0, y: 0 });
    }

    get scrollRoot() {
      return window
    }

    // Rendering

    async render(renderer) {
      const { isPreview, shouldRender, willRender, newSnapshot: snapshot } = renderer;

      // A workaround to ignore tracked element mismatch reloads when performing
      // a promoted Visit from a frame navigation
      const shouldInvalidate = willRender;

      if (shouldRender) {
        try {
          this.renderPromise = new Promise((resolve) => (this.#resolveRenderPromise = resolve));
          this.renderer = renderer;
          await this.prepareToRenderSnapshot(renderer);

          const renderInterception = new Promise((resolve) => (this.#resolveInterceptionPromise = resolve));
          const options = { resume: this.#resolveInterceptionPromise, render: this.renderer.renderElement, renderMethod: this.renderer.renderMethod };
          const immediateRender = this.delegate.allowsImmediateRender(snapshot, options);
          if (!immediateRender) await renderInterception;

          await this.renderSnapshot(renderer);
          this.delegate.viewRenderedSnapshot(snapshot, isPreview, this.renderer.renderMethod);
          this.delegate.preloadOnLoadLinksForView(this.element);
          this.finishRenderingSnapshot(renderer);
        } finally {
          delete this.renderer;
          this.#resolveRenderPromise(undefined);
          delete this.renderPromise;
        }
      } else if (shouldInvalidate) {
        this.invalidate(renderer.reloadReason);
      }
    }

    invalidate(reason) {
      this.delegate.viewInvalidated(reason);
    }

    async prepareToRenderSnapshot(renderer) {
      this.markAsPreview(renderer.isPreview);
      await renderer.prepareToRender();
    }

    markAsPreview(isPreview) {
      if (isPreview) {
        this.element.setAttribute("data-turbo-preview", "");
      } else {
        this.element.removeAttribute("data-turbo-preview");
      }
    }

    markVisitDirection(direction) {
      this.element.setAttribute("data-turbo-visit-direction", direction);
    }

    unmarkVisitDirection() {
      this.element.removeAttribute("data-turbo-visit-direction");
    }

    async renderSnapshot(renderer) {
      await renderer.render();
    }

    finishRenderingSnapshot(renderer) {
      renderer.finishRendering();
    }
  }

  class FrameView extends View {
    missing() {
      this.element.innerHTML = `<strong class="turbo-frame-error">Content missing</strong>`;
    }

    get snapshot() {
      return new Snapshot(this.element)
    }
  }

  class LinkInterceptor {
    constructor(delegate, element) {
      this.delegate = delegate;
      this.element = element;
    }

    start() {
      this.element.addEventListener("click", this.clickBubbled);
      document.addEventListener("turbo:click", this.linkClicked);
      document.addEventListener("turbo:before-visit", this.willVisit);
    }

    stop() {
      this.element.removeEventListener("click", this.clickBubbled);
      document.removeEventListener("turbo:click", this.linkClicked);
      document.removeEventListener("turbo:before-visit", this.willVisit);
    }

    clickBubbled = (event) => {
      if (this.respondsToEventTarget(event.target)) {
        this.clickEvent = event;
      } else {
        delete this.clickEvent;
      }
    }

    linkClicked = (event) => {
      if (this.clickEvent && this.respondsToEventTarget(event.target) && event.target instanceof Element) {
        if (this.delegate.shouldInterceptLinkClick(event.target, event.detail.url, event.detail.originalEvent)) {
          this.clickEvent.preventDefault();
          event.preventDefault();
          this.delegate.linkClickIntercepted(event.target, event.detail.url, event.detail.originalEvent);
        }
      }
      delete this.clickEvent;
    }

    willVisit = (_event) => {
      delete this.clickEvent;
    }

    respondsToEventTarget(target) {
      const element = target instanceof Element ? target : target instanceof Node ? target.parentElement : null;
      return element && element.closest("turbo-frame, html") == this.element
    }
  }

  class LinkClickObserver {
    started = false

    constructor(delegate, eventTarget) {
      this.delegate = delegate;
      this.eventTarget = eventTarget;
    }

    start() {
      if (!this.started) {
        this.eventTarget.addEventListener("click", this.clickCaptured, true);
        this.started = true;
      }
    }

    stop() {
      if (this.started) {
        this.eventTarget.removeEventListener("click", this.clickCaptured, true);
        this.started = false;
      }
    }

    clickCaptured = () => {
      this.eventTarget.removeEventListener("click", this.clickBubbled, false);
      this.eventTarget.addEventListener("click", this.clickBubbled, false);
    }

    clickBubbled = (event) => {
      if (event instanceof MouseEvent && this.clickEventIsSignificant(event)) {
        const target = (event.composedPath && event.composedPath()[0]) || event.target;
        const link = findLinkFromClickTarget(target);
        if (link && doesNotTargetIFrame(link)) {
          const location = getLocationForLink(link);
          if (this.delegate.willFollowLinkToLocation(link, location, event)) {
            event.preventDefault();
            this.delegate.followedLinkToLocation(link, location);
          }
        }
      }
    }

    clickEventIsSignificant(event) {
      return !(
        (event.target && event.target.isContentEditable) ||
        event.defaultPrevented ||
        event.which > 1 ||
        event.altKey ||
        event.ctrlKey ||
        event.metaKey ||
        event.shiftKey
      )
    }
  }

  class FormLinkClickObserver {
    constructor(delegate, element) {
      this.delegate = delegate;
      this.linkInterceptor = new LinkClickObserver(this, element);
    }

    start() {
      this.linkInterceptor.start();
    }

    stop() {
      this.linkInterceptor.stop();
    }

    // Link hover observer delegate

    canPrefetchRequestToLocation(link, location) {
      return false
    }

    prefetchAndCacheRequestToLocation(link, location) {
      return
    }

    // Link click observer delegate

    willFollowLinkToLocation(link, location, originalEvent) {
      return (
        this.delegate.willSubmitFormLinkToLocation(link, location, originalEvent) &&
        (link.hasAttribute("data-turbo-method") || link.hasAttribute("data-turbo-stream"))
      )
    }

    followedLinkToLocation(link, location) {
      const form = document.createElement("form");

      const type = "hidden";
      for (const [name, value] of location.searchParams) {
        form.append(Object.assign(document.createElement("input"), { type, name, value }));
      }

      const action = Object.assign(location, { search: "" });
      form.setAttribute("data-turbo", "true");
      form.setAttribute("action", action.href);
      form.setAttribute("hidden", "");

      const method = link.getAttribute("data-turbo-method");
      if (method) form.setAttribute("method", method);

      const turboFrame = link.getAttribute("data-turbo-frame");
      if (turboFrame) form.setAttribute("data-turbo-frame", turboFrame);

      const turboAction = getVisitAction(link);
      if (turboAction) form.setAttribute("data-turbo-action", turboAction);

      const turboConfirm = link.getAttribute("data-turbo-confirm");
      if (turboConfirm) form.setAttribute("data-turbo-confirm", turboConfirm);

      const turboStream = link.hasAttribute("data-turbo-stream");
      if (turboStream) form.setAttribute("data-turbo-stream", "");

      this.delegate.submittedFormLinkToLocation(link, location, form);

      document.body.appendChild(form);
      form.addEventListener("turbo:submit-end", () => form.remove(), { once: true });
      requestAnimationFrame(() => form.requestSubmit());
    }
  }

  class Bardo {
    static async preservingPermanentElements(delegate, permanentElementMap, callback) {
      const bardo = new this(delegate, permanentElementMap);
      bardo.enter();
      await callback();
      bardo.leave();
    }

    constructor(delegate, permanentElementMap) {
      this.delegate = delegate;
      this.permanentElementMap = permanentElementMap;
    }

    enter() {
      for (const id in this.permanentElementMap) {
        const [currentPermanentElement, newPermanentElement] = this.permanentElementMap[id];
        this.delegate.enteringBardo(currentPermanentElement, newPermanentElement);
        this.replaceNewPermanentElementWithPlaceholder(newPermanentElement);
      }
    }

    leave() {
      for (const id in this.permanentElementMap) {
        const [currentPermanentElement] = this.permanentElementMap[id];
        this.replaceCurrentPermanentElementWithClone(currentPermanentElement);
        this.replacePlaceholderWithPermanentElement(currentPermanentElement);
        this.delegate.leavingBardo(currentPermanentElement);
      }
    }

    replaceNewPermanentElementWithPlaceholder(permanentElement) {
      const placeholder = createPlaceholderForPermanentElement(permanentElement);
      permanentElement.replaceWith(placeholder);
    }

    replaceCurrentPermanentElementWithClone(permanentElement) {
      const clone = permanentElement.cloneNode(true);
      permanentElement.replaceWith(clone);
    }

    replacePlaceholderWithPermanentElement(permanentElement) {
      const placeholder = this.getPlaceholderById(permanentElement.id);
      placeholder?.replaceWith(permanentElement);
    }

    getPlaceholderById(id) {
      return this.placeholders.find((element) => element.content == id)
    }

    get placeholders() {
      return [...document.querySelectorAll("meta[name=turbo-permanent-placeholder][content]")]
    }
  }

  function createPlaceholderForPermanentElement(permanentElement) {
    const element = document.createElement("meta");
    element.setAttribute("name", "turbo-permanent-placeholder");
    element.setAttribute("content", permanentElement.id);
    return element
  }

  class Renderer {
    #activeElement = null

    constructor(currentSnapshot, newSnapshot, renderElement, isPreview, willRender = true) {
      this.currentSnapshot = currentSnapshot;
      this.newSnapshot = newSnapshot;
      this.isPreview = isPreview;
      this.willRender = willRender;
      this.renderElement = renderElement;
      this.promise = new Promise((resolve, reject) => (this.resolvingFunctions = { resolve, reject }));
    }

    get shouldRender() {
      return true
    }

    get reloadReason() {
      return
    }

    prepareToRender() {
      return
    }

    render() {
      // Abstract method
    }

    finishRendering() {
      if (this.resolvingFunctions) {
        this.resolvingFunctions.resolve();
        delete this.resolvingFunctions;
      }
    }

    async preservingPermanentElements(callback) {
      await Bardo.preservingPermanentElements(this, this.permanentElementMap, callback);
    }

    focusFirstAutofocusableElement() {
      const element = this.connectedSnapshot.firstAutofocusableElement;
      if (element) {
        element.focus();
      }
    }

    // Bardo delegate

    enteringBardo(currentPermanentElement) {
      if (this.#activeElement) return

      if (currentPermanentElement.contains(this.currentSnapshot.activeElement)) {
        this.#activeElement = this.currentSnapshot.activeElement;
      }
    }

    leavingBardo(currentPermanentElement) {
      if (currentPermanentElement.contains(this.#activeElement) && this.#activeElement instanceof HTMLElement) {
        this.#activeElement.focus();

        this.#activeElement = null;
      }
    }

    get connectedSnapshot() {
      return this.newSnapshot.isConnected ? this.newSnapshot : this.currentSnapshot
    }

    get currentElement() {
      return this.currentSnapshot.element
    }

    get newElement() {
      return this.newSnapshot.element
    }

    get permanentElementMap() {
      return this.currentSnapshot.getPermanentElementMapForSnapshot(this.newSnapshot)
    }

    get renderMethod() {
      return "replace"
    }
  }

  class FrameRenderer extends Renderer {
    static renderElement(currentElement, newElement) {
      const destinationRange = document.createRange();
      destinationRange.selectNodeContents(currentElement);
      destinationRange.deleteContents();

      const frameElement = newElement;
      const sourceRange = frameElement.ownerDocument?.createRange();
      if (sourceRange) {
        sourceRange.selectNodeContents(frameElement);
        currentElement.appendChild(sourceRange.extractContents());
      }
    }

    constructor(delegate, currentSnapshot, newSnapshot, renderElement, isPreview, willRender = true) {
      super(currentSnapshot, newSnapshot, renderElement, isPreview, willRender);
      this.delegate = delegate;
    }

    get shouldRender() {
      return true
    }

    async render() {
      await nextRepaint();
      this.preservingPermanentElements(() => {
        this.loadFrameElement();
      });
      this.scrollFrameIntoView();
      await nextRepaint();
      this.focusFirstAutofocusableElement();
      await nextRepaint();
      this.activateScriptElements();
    }

    loadFrameElement() {
      this.delegate.willRenderFrame(this.currentElement, this.newElement);
      this.renderElement(this.currentElement, this.newElement);
    }

    scrollFrameIntoView() {
      if (this.currentElement.autoscroll || this.newElement.autoscroll) {
        const element = this.currentElement.firstElementChild;
        const block = readScrollLogicalPosition(this.currentElement.getAttribute("data-autoscroll-block"), "end");
        const behavior = readScrollBehavior(this.currentElement.getAttribute("data-autoscroll-behavior"), "auto");

        if (element) {
          element.scrollIntoView({ block, behavior });
          return true
        }
      }
      return false
    }

    activateScriptElements() {
      for (const inertScriptElement of this.newScriptElements) {
        const activatedScriptElement = activateScriptElement(inertScriptElement);
        inertScriptElement.replaceWith(activatedScriptElement);
      }
    }

    get newScriptElements() {
      return this.currentElement.querySelectorAll("script")
    }
  }

  function readScrollLogicalPosition(value, defaultValue) {
    if (value == "end" || value == "start" || value == "center" || value == "nearest") {
      return value
    } else {
      return defaultValue
    }
  }

  function readScrollBehavior(value, defaultValue) {
    if (value == "auto" || value == "smooth") {
      return value
    } else {
      return defaultValue
    }
  }

  class ProgressBar {
    static animationDuration = 300 /*ms*/

    static get defaultCSS() {
      return unindent`
      .turbo-progress-bar {
        position: fixed;
        display: block;
        top: 0;
        left: 0;
        height: 3px;
        background: #0076ff;
        z-index: 2147483647;
        transition:
          width ${ProgressBar.animationDuration}ms ease-out,
          opacity ${ProgressBar.animationDuration / 2}ms ${ProgressBar.animationDuration / 2}ms ease-in;
        transform: translate3d(0, 0, 0);
      }
    `
    }

    hiding = false
    value = 0
    visible = false

    constructor() {
      this.stylesheetElement = this.createStylesheetElement();
      this.progressElement = this.createProgressElement();
      this.installStylesheetElement();
      this.setValue(0);
    }

    show() {
      if (!this.visible) {
        this.visible = true;
        this.installProgressElement();
        this.startTrickling();
      }
    }

    hide() {
      if (this.visible && !this.hiding) {
        this.hiding = true;
        this.fadeProgressElement(() => {
          this.uninstallProgressElement();
          this.stopTrickling();
          this.visible = false;
          this.hiding = false;
        });
      }
    }

    setValue(value) {
      this.value = value;
      this.refresh();
    }

    // Private

    installStylesheetElement() {
      document.head.insertBefore(this.stylesheetElement, document.head.firstChild);
    }

    installProgressElement() {
      this.progressElement.style.width = "0";
      this.progressElement.style.opacity = "1";
      document.documentElement.insertBefore(this.progressElement, document.body);
      this.refresh();
    }

    fadeProgressElement(callback) {
      this.progressElement.style.opacity = "0";
      setTimeout(callback, ProgressBar.animationDuration * 1.5);
    }

    uninstallProgressElement() {
      if (this.progressElement.parentNode) {
        document.documentElement.removeChild(this.progressElement);
      }
    }

    startTrickling() {
      if (!this.trickleInterval) {
        this.trickleInterval = window.setInterval(this.trickle, ProgressBar.animationDuration);
      }
    }

    stopTrickling() {
      window.clearInterval(this.trickleInterval);
      delete this.trickleInterval;
    }

    trickle = () => {
      this.setValue(this.value + Math.random() / 100);
    }

    refresh() {
      requestAnimationFrame(() => {
        this.progressElement.style.width = `${10 + this.value * 90}%`;
      });
    }

    createStylesheetElement() {
      const element = document.createElement("style");
      element.type = "text/css";
      element.textContent = ProgressBar.defaultCSS;
      if (this.cspNonce) {
        element.nonce = this.cspNonce;
      }
      return element
    }

    createProgressElement() {
      const element = document.createElement("div");
      element.className = "turbo-progress-bar";
      return element
    }

    get cspNonce() {
      return getMetaContent("csp-nonce")
    }
  }

  class HeadSnapshot extends Snapshot {
    detailsByOuterHTML = this.children
      .filter((element) => !elementIsNoscript(element))
      .map((element) => elementWithoutNonce(element))
      .reduce((result, element) => {
        const { outerHTML } = element;
        const details =
          outerHTML in result
            ? result[outerHTML]
            : {
                type: elementType(element),
                tracked: elementIsTracked(element),
                elements: []
              };
        return {
          ...result,
          [outerHTML]: {
            ...details,
            elements: [...details.elements, element]
          }
        }
      }, {})

    get trackedElementSignature() {
      return Object.keys(this.detailsByOuterHTML)
        .filter((outerHTML) => this.detailsByOuterHTML[outerHTML].tracked)
        .join("")
    }

    getScriptElementsNotInSnapshot(snapshot) {
      return this.getElementsMatchingTypeNotInSnapshot("script", snapshot)
    }

    getStylesheetElementsNotInSnapshot(snapshot) {
      return this.getElementsMatchingTypeNotInSnapshot("stylesheet", snapshot)
    }

    getElementsMatchingTypeNotInSnapshot(matchedType, snapshot) {
      return Object.keys(this.detailsByOuterHTML)
        .filter((outerHTML) => !(outerHTML in snapshot.detailsByOuterHTML))
        .map((outerHTML) => this.detailsByOuterHTML[outerHTML])
        .filter(({ type }) => type == matchedType)
        .map(({ elements: [element] }) => element)
    }

    get provisionalElements() {
      return Object.keys(this.detailsByOuterHTML).reduce((result, outerHTML) => {
        const { type, tracked, elements } = this.detailsByOuterHTML[outerHTML];
        if (type == null && !tracked) {
          return [...result, ...elements]
        } else if (elements.length > 1) {
          return [...result, ...elements.slice(1)]
        } else {
          return result
        }
      }, [])
    }

    getMetaValue(name) {
      const element = this.findMetaElementByName(name);
      return element ? element.getAttribute("content") : null
    }

    findMetaElementByName(name) {
      return Object.keys(this.detailsByOuterHTML).reduce((result, outerHTML) => {
        const {
          elements: [element]
        } = this.detailsByOuterHTML[outerHTML];
        return elementIsMetaElementWithName(element, name) ? element : result
      }, undefined | undefined)
    }
  }

  function elementType(element) {
    if (elementIsScript(element)) {
      return "script"
    } else if (elementIsStylesheet(element)) {
      return "stylesheet"
    }
  }

  function elementIsTracked(element) {
    return element.getAttribute("data-turbo-track") == "reload"
  }

  function elementIsScript(element) {
    const tagName = element.localName;
    return tagName == "script"
  }

  function elementIsNoscript(element) {
    const tagName = element.localName;
    return tagName == "noscript"
  }

  function elementIsStylesheet(element) {
    const tagName = element.localName;
    return tagName == "style" || (tagName == "link" && element.getAttribute("rel") == "stylesheet")
  }

  function elementIsMetaElementWithName(element, name) {
    const tagName = element.localName;
    return tagName == "meta" && element.getAttribute("name") == name
  }

  function elementWithoutNonce(element) {
    if (element.hasAttribute("nonce")) {
      element.setAttribute("nonce", "");
    }

    return element
  }

  class PageSnapshot extends Snapshot {
    static fromHTMLString(html = "") {
      return this.fromDocument(parseHTMLDocument(html))
    }

    static fromElement(element) {
      return this.fromDocument(element.ownerDocument)
    }

    static fromDocument({ documentElement, body, head }) {
      return new this(documentElement, body, new HeadSnapshot(head))
    }

    constructor(documentElement, body, headSnapshot) {
      super(body);
      this.documentElement = documentElement;
      this.headSnapshot = headSnapshot;
    }

    clone() {
      const clonedElement = this.element.cloneNode(true);

      const selectElements = this.element.querySelectorAll("select");
      const clonedSelectElements = clonedElement.querySelectorAll("select");

      for (const [index, source] of selectElements.entries()) {
        const clone = clonedSelectElements[index];
        for (const option of clone.selectedOptions) option.selected = false;
        for (const option of source.selectedOptions) clone.options[option.index].selected = true;
      }

      for (const clonedPasswordInput of clonedElement.querySelectorAll('input[type="password"]')) {
        clonedPasswordInput.value = "";
      }

      return new PageSnapshot(this.documentElement, clonedElement, this.headSnapshot)
    }

    get lang() {
      return this.documentElement.getAttribute("lang")
    }

    get headElement() {
      return this.headSnapshot.element
    }

    get rootLocation() {
      const root = this.getSetting("root") ?? "/";
      return expandURL(root)
    }

    get cacheControlValue() {
      return this.getSetting("cache-control")
    }

    get isPreviewable() {
      return this.cacheControlValue != "no-preview"
    }

    get isCacheable() {
      return this.cacheControlValue != "no-cache"
    }

    get isVisitable() {
      return this.getSetting("visit-control") != "reload"
    }

    get prefersViewTransitions() {
      return this.headSnapshot.getMetaValue("view-transition") === "same-origin"
    }

    get shouldMorphPage() {
      return this.getSetting("refresh-method") === "morph"
    }

    get shouldPreserveScrollPosition() {
      return this.getSetting("refresh-scroll") === "preserve"
    }

    // Private

    getSetting(name) {
      return this.headSnapshot.getMetaValue(`turbo-${name}`)
    }
  }

  class ViewTransitioner {
    #viewTransitionStarted = false
    #lastOperation = Promise.resolve()

    renderChange(useViewTransition, render) {
      if (useViewTransition && this.viewTransitionsAvailable && !this.#viewTransitionStarted) {
        this.#viewTransitionStarted = true;
        this.#lastOperation = this.#lastOperation.then(async () => {
          await document.startViewTransition(render).finished;
        });
      } else {
        this.#lastOperation = this.#lastOperation.then(render);
      }

      return this.#lastOperation
    }

    get viewTransitionsAvailable() {
      return document.startViewTransition
    }
  }

  const defaultOptions = {
    action: "advance",
    historyChanged: false,
    visitCachedSnapshot: () => {},
    willRender: true,
    updateHistory: true,
    shouldCacheSnapshot: true,
    acceptsStreamResponse: false
  };

  const TimingMetric = {
    visitStart: "visitStart",
    requestStart: "requestStart",
    requestEnd: "requestEnd",
    visitEnd: "visitEnd"
  };

  const VisitState = {
    initialized: "initialized",
    started: "started",
    canceled: "canceled",
    failed: "failed",
    completed: "completed"
  };

  const SystemStatusCode = {
    networkFailure: 0,
    timeoutFailure: -1,
    contentTypeMismatch: -2
  };

  const Direction = {
    advance: "forward",
    restore: "back",
    replace: "none"
  };

  class Visit {
    identifier = uuid() // Required by turbo-ios
    timingMetrics = {}

    followedRedirect = false
    historyChanged = false
    scrolled = false
    shouldCacheSnapshot = true
    acceptsStreamResponse = false
    snapshotCached = false
    state = VisitState.initialized
    viewTransitioner = new ViewTransitioner()

    constructor(delegate, location, restorationIdentifier, options = {}) {
      this.delegate = delegate;
      this.location = location;
      this.restorationIdentifier = restorationIdentifier || uuid();

      const {
        action,
        historyChanged,
        referrer,
        snapshot,
        snapshotHTML,
        response,
        visitCachedSnapshot,
        willRender,
        updateHistory,
        shouldCacheSnapshot,
        acceptsStreamResponse,
        direction
      } = {
        ...defaultOptions,
        ...options
      };
      this.action = action;
      this.historyChanged = historyChanged;
      this.referrer = referrer;
      this.snapshot = snapshot;
      this.snapshotHTML = snapshotHTML;
      this.response = response;
      this.isSamePage = this.delegate.locationWithActionIsSamePage(this.location, this.action);
      this.isPageRefresh = this.view.isPageRefresh(this);
      this.visitCachedSnapshot = visitCachedSnapshot;
      this.willRender = willRender;
      this.updateHistory = updateHistory;
      this.scrolled = !willRender;
      this.shouldCacheSnapshot = shouldCacheSnapshot;
      this.acceptsStreamResponse = acceptsStreamResponse;
      this.direction = direction || Direction[action];
    }

    get adapter() {
      return this.delegate.adapter
    }

    get view() {
      return this.delegate.view
    }

    get history() {
      return this.delegate.history
    }

    get restorationData() {
      return this.history.getRestorationDataForIdentifier(this.restorationIdentifier)
    }

    get silent() {
      return this.isSamePage
    }

    start() {
      if (this.state == VisitState.initialized) {
        this.recordTimingMetric(TimingMetric.visitStart);
        this.state = VisitState.started;
        this.adapter.visitStarted(this);
        this.delegate.visitStarted(this);
      }
    }

    cancel() {
      if (this.state == VisitState.started) {
        if (this.request) {
          this.request.cancel();
        }
        this.cancelRender();
        this.state = VisitState.canceled;
      }
    }

    complete() {
      if (this.state == VisitState.started) {
        this.recordTimingMetric(TimingMetric.visitEnd);
        this.adapter.visitCompleted(this);
        this.state = VisitState.completed;
        this.followRedirect();

        if (!this.followedRedirect) {
          this.delegate.visitCompleted(this);
        }
      }
    }

    fail() {
      if (this.state == VisitState.started) {
        this.state = VisitState.failed;
        this.adapter.visitFailed(this);
        this.delegate.visitCompleted(this);
      }
    }

    changeHistory() {
      if (!this.historyChanged && this.updateHistory) {
        const actionForHistory = this.location.href === this.referrer?.href ? "replace" : this.action;
        const method = getHistoryMethodForAction(actionForHistory);
        this.history.update(method, this.location, this.restorationIdentifier);
        this.historyChanged = true;
      }
    }

    issueRequest() {
      if (this.hasPreloadedResponse()) {
        this.simulateRequest();
      } else if (this.shouldIssueRequest() && !this.request) {
        this.request = new FetchRequest(this, FetchMethod.get, this.location);
        this.request.perform();
      }
    }

    simulateRequest() {
      if (this.response) {
        this.startRequest();
        this.recordResponse();
        this.finishRequest();
      }
    }

    startRequest() {
      this.recordTimingMetric(TimingMetric.requestStart);
      this.adapter.visitRequestStarted(this);
    }

    recordResponse(response = this.response) {
      this.response = response;
      if (response) {
        const { statusCode } = response;
        if (isSuccessful(statusCode)) {
          this.adapter.visitRequestCompleted(this);
        } else {
          this.adapter.visitRequestFailedWithStatusCode(this, statusCode);
        }
      }
    }

    finishRequest() {
      this.recordTimingMetric(TimingMetric.requestEnd);
      this.adapter.visitRequestFinished(this);
    }

    loadResponse() {
      if (this.response) {
        const { statusCode, responseHTML } = this.response;
        this.render(async () => {
          if (this.shouldCacheSnapshot) this.cacheSnapshot();
          if (this.view.renderPromise) await this.view.renderPromise;

          if (isSuccessful(statusCode) && responseHTML != null) {
            const snapshot = PageSnapshot.fromHTMLString(responseHTML);
            await this.renderPageSnapshot(snapshot, false);

            this.adapter.visitRendered(this);
            this.complete();
          } else {
            await this.view.renderError(PageSnapshot.fromHTMLString(responseHTML), this);
            this.adapter.visitRendered(this);
            this.fail();
          }
        });
      }
    }

    getCachedSnapshot() {
      const snapshot = this.view.getCachedSnapshotForLocation(this.location) || this.getPreloadedSnapshot();

      if (snapshot && (!getAnchor(this.location) || snapshot.hasAnchor(getAnchor(this.location)))) {
        if (this.action == "restore" || snapshot.isPreviewable) {
          return snapshot
        }
      }
    }

    getPreloadedSnapshot() {
      if (this.snapshotHTML) {
        return PageSnapshot.fromHTMLString(this.snapshotHTML)
      }
    }

    hasCachedSnapshot() {
      return this.getCachedSnapshot() != null
    }

    loadCachedSnapshot() {
      const snapshot = this.getCachedSnapshot();
      if (snapshot) {
        const isPreview = this.shouldIssueRequest();
        this.render(async () => {
          this.cacheSnapshot();
          if (this.isSamePage || this.isPageRefresh) {
            this.adapter.visitRendered(this);
          } else {
            if (this.view.renderPromise) await this.view.renderPromise;

            await this.renderPageSnapshot(snapshot, isPreview);

            this.adapter.visitRendered(this);
            if (!isPreview) {
              this.complete();
            }
          }
        });
      }
    }

    followRedirect() {
      if (this.redirectedToLocation && !this.followedRedirect && this.response?.redirected) {
        this.adapter.visitProposedToLocation(this.redirectedToLocation, {
          action: "replace",
          response: this.response,
          shouldCacheSnapshot: false,
          willRender: false
        });
        this.followedRedirect = true;
      }
    }

    goToSamePageAnchor() {
      if (this.isSamePage) {
        this.render(async () => {
          this.cacheSnapshot();
          this.performScroll();
          this.changeHistory();
          this.adapter.visitRendered(this);
        });
      }
    }

    // Fetch request delegate

    prepareRequest(request) {
      if (this.acceptsStreamResponse) {
        request.acceptResponseType(StreamMessage.contentType);
      }
    }

    requestStarted() {
      this.startRequest();
    }

    requestPreventedHandlingResponse(_request, _response) {}

    async requestSucceededWithResponse(request, response) {
      const responseHTML = await response.responseHTML;
      const { redirected, statusCode } = response;
      if (responseHTML == undefined) {
        this.recordResponse({
          statusCode: SystemStatusCode.contentTypeMismatch,
          redirected
        });
      } else {
        this.redirectedToLocation = response.redirected ? response.location : undefined;
        this.recordResponse({ statusCode: statusCode, responseHTML, redirected });
      }
    }

    async requestFailedWithResponse(request, response) {
      const responseHTML = await response.responseHTML;
      const { redirected, statusCode } = response;
      if (responseHTML == undefined) {
        this.recordResponse({
          statusCode: SystemStatusCode.contentTypeMismatch,
          redirected
        });
      } else {
        this.recordResponse({ statusCode: statusCode, responseHTML, redirected });
      }
    }

    requestErrored(_request, _error) {
      this.recordResponse({
        statusCode: SystemStatusCode.networkFailure,
        redirected: false
      });
    }

    requestFinished() {
      this.finishRequest();
    }

    // Scrolling

    performScroll() {
      if (!this.scrolled && !this.view.forceReloaded && !this.view.shouldPreserveScrollPosition(this)) {
        if (this.action == "restore") {
          this.scrollToRestoredPosition() || this.scrollToAnchor() || this.view.scrollToTop();
        } else {
          this.scrollToAnchor() || this.view.scrollToTop();
        }
        if (this.isSamePage) {
          this.delegate.visitScrolledToSamePageLocation(this.view.lastRenderedLocation, this.location);
        }

        this.scrolled = true;
      }
    }

    scrollToRestoredPosition() {
      const { scrollPosition } = this.restorationData;
      if (scrollPosition) {
        this.view.scrollToPosition(scrollPosition);
        return true
      }
    }

    scrollToAnchor() {
      const anchor = getAnchor(this.location);
      if (anchor != null) {
        this.view.scrollToAnchor(anchor);
        return true
      }
    }

    // Instrumentation

    recordTimingMetric(metric) {
      this.timingMetrics[metric] = new Date().getTime();
    }

    getTimingMetrics() {
      return { ...this.timingMetrics }
    }

    // Private

    getHistoryMethodForAction(action) {
      switch (action) {
        case "replace":
          return history.replaceState
        case "advance":
        case "restore":
          return history.pushState
      }
    }

    hasPreloadedResponse() {
      return typeof this.response == "object"
    }

    shouldIssueRequest() {
      if (this.isSamePage) {
        return false
      } else if (this.action == "restore") {
        return !this.hasCachedSnapshot()
      } else {
        return this.willRender
      }
    }

    cacheSnapshot() {
      if (!this.snapshotCached) {
        this.view.cacheSnapshot(this.snapshot).then((snapshot) => snapshot && this.visitCachedSnapshot(snapshot));
        this.snapshotCached = true;
      }
    }

    async render(callback) {
      this.cancelRender();
      this.frame = await nextRepaint();
      await callback();
      delete this.frame;
    }

    async renderPageSnapshot(snapshot, isPreview) {
      await this.viewTransitioner.renderChange(this.view.shouldTransitionTo(snapshot), async () => {
        await this.view.renderPage(snapshot, isPreview, this.willRender, this);
        this.performScroll();
      });
    }

    cancelRender() {
      if (this.frame) {
        cancelAnimationFrame(this.frame);
        delete this.frame;
      }
    }
  }

  function isSuccessful(statusCode) {
    return statusCode >= 200 && statusCode < 300
  }

  class BrowserAdapter {
    progressBar = new ProgressBar()

    constructor(session) {
      this.session = session;
    }

    visitProposedToLocation(location, options) {
      if (locationIsVisitable(location, this.navigator.rootLocation)) {
        this.navigator.startVisit(location, options?.restorationIdentifier || uuid(), options);
      } else {
        window.location.href = location.toString();
      }
    }

    visitStarted(visit) {
      this.location = visit.location;
      visit.loadCachedSnapshot();
      visit.issueRequest();
      visit.goToSamePageAnchor();
    }

    visitRequestStarted(visit) {
      this.progressBar.setValue(0);
      if (visit.hasCachedSnapshot() || visit.action != "restore") {
        this.showVisitProgressBarAfterDelay();
      } else {
        this.showProgressBar();
      }
    }

    visitRequestCompleted(visit) {
      visit.loadResponse();
    }

    visitRequestFailedWithStatusCode(visit, statusCode) {
      switch (statusCode) {
        case SystemStatusCode.networkFailure:
        case SystemStatusCode.timeoutFailure:
        case SystemStatusCode.contentTypeMismatch:
          return this.reload({
            reason: "request_failed",
            context: {
              statusCode
            }
          })
        default:
          return visit.loadResponse()
      }
    }

    visitRequestFinished(_visit) {}

    visitCompleted(_visit) {
      this.progressBar.setValue(1);
      this.hideVisitProgressBar();
    }

    pageInvalidated(reason) {
      this.reload(reason);
    }

    visitFailed(_visit) {
      this.progressBar.setValue(1);
      this.hideVisitProgressBar();
    }

    visitRendered(_visit) {}

    // Form Submission Delegate

    formSubmissionStarted(_formSubmission) {
      this.progressBar.setValue(0);
      this.showFormProgressBarAfterDelay();
    }

    formSubmissionFinished(_formSubmission) {
      this.progressBar.setValue(1);
      this.hideFormProgressBar();
    }

    // Private

    showVisitProgressBarAfterDelay() {
      this.visitProgressBarTimeout = window.setTimeout(this.showProgressBar, this.session.progressBarDelay);
    }

    hideVisitProgressBar() {
      this.progressBar.hide();
      if (this.visitProgressBarTimeout != null) {
        window.clearTimeout(this.visitProgressBarTimeout);
        delete this.visitProgressBarTimeout;
      }
    }

    showFormProgressBarAfterDelay() {
      if (this.formProgressBarTimeout == null) {
        this.formProgressBarTimeout = window.setTimeout(this.showProgressBar, this.session.progressBarDelay);
      }
    }

    hideFormProgressBar() {
      this.progressBar.hide();
      if (this.formProgressBarTimeout != null) {
        window.clearTimeout(this.formProgressBarTimeout);
        delete this.formProgressBarTimeout;
      }
    }

    showProgressBar = () => {
      this.progressBar.show();
    }

    reload(reason) {
      dispatch("turbo:reload", { detail: reason });

      window.location.href = this.location?.toString() || window.location.href;
    }

    get navigator() {
      return this.session.navigator
    }
  }

  class CacheObserver {
    selector = "[data-turbo-temporary]"
    deprecatedSelector = "[data-turbo-cache=false]"

    started = false

    start() {
      if (!this.started) {
        this.started = true;
        addEventListener("turbo:before-cache", this.removeTemporaryElements, false);
      }
    }

    stop() {
      if (this.started) {
        this.started = false;
        removeEventListener("turbo:before-cache", this.removeTemporaryElements, false);
      }
    }

    removeTemporaryElements = (_event) => {
      for (const element of this.temporaryElements) {
        element.remove();
      }
    }

    get temporaryElements() {
      return [...document.querySelectorAll(this.selector), ...this.temporaryElementsWithDeprecation]
    }

    get temporaryElementsWithDeprecation() {
      const elements = document.querySelectorAll(this.deprecatedSelector);

      if (elements.length) {
        console.warn(
          `The ${this.deprecatedSelector} selector is deprecated and will be removed in a future version. Use ${this.selector} instead.`
        );
      }

      return [...elements]
    }
  }

  class FrameRedirector {
    constructor(session, element) {
      this.session = session;
      this.element = element;
      this.linkInterceptor = new LinkInterceptor(this, element);
      this.formSubmitObserver = new FormSubmitObserver(this, element);
    }

    start() {
      this.linkInterceptor.start();
      this.formSubmitObserver.start();
    }

    stop() {
      this.linkInterceptor.stop();
      this.formSubmitObserver.stop();
    }

    // Link interceptor delegate

    shouldInterceptLinkClick(element, _location, _event) {
      return this.#shouldRedirect(element)
    }

    linkClickIntercepted(element, url, event) {
      const frame = this.#findFrameElement(element);
      if (frame) {
        frame.delegate.linkClickIntercepted(element, url, event);
      }
    }

    // Form submit observer delegate

    willSubmitForm(element, submitter) {
      return (
        element.closest("turbo-frame") == null &&
        this.#shouldSubmit(element, submitter) &&
        this.#shouldRedirect(element, submitter)
      )
    }

    formSubmitted(element, submitter) {
      const frame = this.#findFrameElement(element, submitter);
      if (frame) {
        frame.delegate.formSubmitted(element, submitter);
      }
    }

    #shouldSubmit(form, submitter) {
      const action = getAction$1(form, submitter);
      const meta = this.element.ownerDocument.querySelector(`meta[name="turbo-root"]`);
      const rootLocation = expandURL(meta?.content ?? "/");

      return this.#shouldRedirect(form, submitter) && locationIsVisitable(action, rootLocation)
    }

    #shouldRedirect(element, submitter) {
      const isNavigatable =
        element instanceof HTMLFormElement
          ? this.session.submissionIsNavigatable(element, submitter)
          : this.session.elementIsNavigatable(element);

      if (isNavigatable) {
        const frame = this.#findFrameElement(element, submitter);
        return frame ? frame != element.closest("turbo-frame") : false
      } else {
        return false
      }
    }

    #findFrameElement(element, submitter) {
      const id = submitter?.getAttribute("data-turbo-frame") || element.getAttribute("data-turbo-frame");
      if (id && id != "_top") {
        const frame = this.element.querySelector(`#${id}:not([disabled])`);
        if (frame instanceof FrameElement) {
          return frame
        }
      }
    }
  }

  class History {
    location
    restorationIdentifier = uuid()
    restorationData = {}
    started = false
    pageLoaded = false
    currentIndex = 0

    constructor(delegate) {
      this.delegate = delegate;
    }

    start() {
      if (!this.started) {
        addEventListener("popstate", this.onPopState, false);
        addEventListener("load", this.onPageLoad, false);
        this.currentIndex = history.state?.turbo?.restorationIndex || 0;
        this.started = true;
        this.replace(new URL(window.location.href));
      }
    }

    stop() {
      if (this.started) {
        removeEventListener("popstate", this.onPopState, false);
        removeEventListener("load", this.onPageLoad, false);
        this.started = false;
      }
    }

    push(location, restorationIdentifier) {
      this.update(history.pushState, location, restorationIdentifier);
    }

    replace(location, restorationIdentifier) {
      this.update(history.replaceState, location, restorationIdentifier);
    }

    update(method, location, restorationIdentifier = uuid()) {
      if (method === history.pushState) ++this.currentIndex;

      const state = { turbo: { restorationIdentifier, restorationIndex: this.currentIndex } };
      method.call(history, state, "", location.href);
      this.location = location;
      this.restorationIdentifier = restorationIdentifier;
    }

    // Restoration data

    getRestorationDataForIdentifier(restorationIdentifier) {
      return this.restorationData[restorationIdentifier] || {}
    }

    updateRestorationData(additionalData) {
      const { restorationIdentifier } = this;
      const restorationData = this.restorationData[restorationIdentifier];
      this.restorationData[restorationIdentifier] = {
        ...restorationData,
        ...additionalData
      };
    }

    // Scroll restoration

    assumeControlOfScrollRestoration() {
      if (!this.previousScrollRestoration) {
        this.previousScrollRestoration = history.scrollRestoration ?? "auto";
        history.scrollRestoration = "manual";
      }
    }

    relinquishControlOfScrollRestoration() {
      if (this.previousScrollRestoration) {
        history.scrollRestoration = this.previousScrollRestoration;
        delete this.previousScrollRestoration;
      }
    }

    // Event handlers

    onPopState = (event) => {
      if (this.shouldHandlePopState()) {
        const { turbo } = event.state || {};
        if (turbo) {
          this.location = new URL(window.location.href);
          const { restorationIdentifier, restorationIndex } = turbo;
          this.restorationIdentifier = restorationIdentifier;
          const direction = restorationIndex > this.currentIndex ? "forward" : "back";
          this.delegate.historyPoppedToLocationWithRestorationIdentifierAndDirection(this.location, restorationIdentifier, direction);
          this.currentIndex = restorationIndex;
        }
      }
    }

    onPageLoad = async (_event) => {
      await nextMicrotask();
      this.pageLoaded = true;
    }

    // Private

    shouldHandlePopState() {
      // Safari dispatches a popstate event after window's load event, ignore it
      return this.pageIsLoaded()
    }

    pageIsLoaded() {
      return this.pageLoaded || document.readyState == "complete"
    }
  }

  class LinkPrefetchObserver {
    started = false
    #prefetchedLink = null

    constructor(delegate, eventTarget) {
      this.delegate = delegate;
      this.eventTarget = eventTarget;
    }

    start() {
      if (this.started) return

      if (this.eventTarget.readyState === "loading") {
        this.eventTarget.addEventListener("DOMContentLoaded", this.#enable, { once: true });
      } else {
        this.#enable();
      }
    }

    stop() {
      if (!this.started) return

      this.eventTarget.removeEventListener("mouseenter", this.#tryToPrefetchRequest, {
        capture: true,
        passive: true
      });
      this.eventTarget.removeEventListener("mouseleave", this.#cancelRequestIfObsolete, {
        capture: true,
        passive: true
      });

      this.eventTarget.removeEventListener("turbo:before-fetch-request", this.#tryToUsePrefetchedRequest, true);
      this.started = false;
    }

    #enable = () => {
      this.eventTarget.addEventListener("mouseenter", this.#tryToPrefetchRequest, {
        capture: true,
        passive: true
      });
      this.eventTarget.addEventListener("mouseleave", this.#cancelRequestIfObsolete, {
        capture: true,
        passive: true
      });

      this.eventTarget.addEventListener("turbo:before-fetch-request", this.#tryToUsePrefetchedRequest, true);
      this.started = true;
    }

    #tryToPrefetchRequest = (event) => {
      if (getMetaContent("turbo-prefetch") === "false") return

      const target = event.target;
      const isLink = target.matches && target.matches("a[href]:not([target^=_]):not([download])");

      if (isLink && this.#isPrefetchable(target)) {
        const link = target;
        const location = getLocationForLink(link);

        if (this.delegate.canPrefetchRequestToLocation(link, location)) {
          this.#prefetchedLink = link;

          const fetchRequest = new FetchRequest(
            this,
            FetchMethod.get,
            location,
            new URLSearchParams(),
            target
          );

          prefetchCache.setLater(location.toString(), fetchRequest, this.#cacheTtl);
        }
      }
    }

    #cancelRequestIfObsolete = (event) => {
      if (event.target === this.#prefetchedLink) this.#cancelPrefetchRequest();
    }

    #cancelPrefetchRequest = () => {
      prefetchCache.clear();
      this.#prefetchedLink = null;
    }

    #tryToUsePrefetchedRequest = (event) => {
      if (event.target.tagName !== "FORM" && event.detail.fetchOptions.method === "get") {
        const cached = prefetchCache.get(event.detail.url.toString());

        if (cached) {
          // User clicked link, use cache response
          event.detail.fetchRequest = cached;
        }

        prefetchCache.clear();
      }
    }

    prepareRequest(request) {
      const link = request.target;

      request.headers["X-Sec-Purpose"] = "prefetch";

      const turboFrame = link.closest("turbo-frame");
      const turboFrameTarget = link.getAttribute("data-turbo-frame") || turboFrame?.getAttribute("target") || turboFrame?.id;

      if (turboFrameTarget && turboFrameTarget !== "_top") {
        request.headers["Turbo-Frame"] = turboFrameTarget;
      }
    }

    // Fetch request interface

    requestSucceededWithResponse() {}

    requestStarted(fetchRequest) {}

    requestErrored(fetchRequest) {}

    requestFinished(fetchRequest) {}

    requestPreventedHandlingResponse(fetchRequest, fetchResponse) {}

    requestFailedWithResponse(fetchRequest, fetchResponse) {}

    get #cacheTtl() {
      return Number(getMetaContent("turbo-prefetch-cache-time")) || cacheTtl
    }

    #isPrefetchable(link) {
      const href = link.getAttribute("href");

      if (!href) return false

      if (unfetchableLink(link)) return false
      if (linkToTheSamePage(link)) return false
      if (linkOptsOut(link)) return false
      if (nonSafeLink(link)) return false
      if (eventPrevented(link)) return false

      return true
    }
  }

  const unfetchableLink = (link) => {
    return link.origin !== document.location.origin || !["http:", "https:"].includes(link.protocol) || link.hasAttribute("target")
  };

  const linkToTheSamePage = (link) => {
    return (link.pathname + link.search === document.location.pathname + document.location.search) || link.href.startsWith("#")
  };

  const linkOptsOut = (link) => {
    if (link.getAttribute("data-turbo-prefetch") === "false") return true
    if (link.getAttribute("data-turbo") === "false") return true

    const turboPrefetchParent = findClosestRecursively(link, "[data-turbo-prefetch]");
    if (turboPrefetchParent && turboPrefetchParent.getAttribute("data-turbo-prefetch") === "false") return true

    return false
  };

  const nonSafeLink = (link) => {
    const turboMethod = link.getAttribute("data-turbo-method");
    if (turboMethod && turboMethod.toLowerCase() !== "get") return true

    if (isUJS(link)) return true
    if (link.hasAttribute("data-turbo-confirm")) return true
    if (link.hasAttribute("data-turbo-stream")) return true

    return false
  };

  const isUJS = (link) => {
    return link.hasAttribute("data-remote") || link.hasAttribute("data-behavior") || link.hasAttribute("data-confirm") || link.hasAttribute("data-method")
  };

  const eventPrevented = (link) => {
    const event = dispatch("turbo:before-prefetch", { target: link, cancelable: true });
    return event.defaultPrevented
  };

  class Navigator {
    constructor(delegate) {
      this.delegate = delegate;
    }

    proposeVisit(location, options = {}) {
      if (this.delegate.allowsVisitingLocationWithAction(location, options.action)) {
        this.delegate.visitProposedToLocation(location, options);
      }
    }

    startVisit(locatable, restorationIdentifier, options = {}) {
      this.stop();
      this.currentVisit = new Visit(this, expandURL(locatable), restorationIdentifier, {
        referrer: this.location,
        ...options
      });
      this.currentVisit.start();
    }

    submitForm(form, submitter) {
      this.stop();
      this.formSubmission = new FormSubmission(this, form, submitter, true);

      this.formSubmission.start();
    }

    stop() {
      if (this.formSubmission) {
        this.formSubmission.stop();
        delete this.formSubmission;
      }

      if (this.currentVisit) {
        this.currentVisit.cancel();
        delete this.currentVisit;
      }
    }

    get adapter() {
      return this.delegate.adapter
    }

    get view() {
      return this.delegate.view
    }

    get rootLocation() {
      return this.view.snapshot.rootLocation
    }

    get history() {
      return this.delegate.history
    }

    // Form submission delegate

    formSubmissionStarted(formSubmission) {
      // Not all adapters implement formSubmissionStarted
      if (typeof this.adapter.formSubmissionStarted === "function") {
        this.adapter.formSubmissionStarted(formSubmission);
      }
    }

    async formSubmissionSucceededWithResponse(formSubmission, fetchResponse) {
      if (formSubmission == this.formSubmission) {
        const responseHTML = await fetchResponse.responseHTML;
        if (responseHTML) {
          const shouldCacheSnapshot = formSubmission.isSafe;
          if (!shouldCacheSnapshot) {
            this.view.clearSnapshotCache();
          }

          const { statusCode, redirected } = fetchResponse;
          const action = this.#getActionForFormSubmission(formSubmission, fetchResponse);
          const visitOptions = {
            action,
            shouldCacheSnapshot,
            response: { statusCode, responseHTML, redirected }
          };
          this.proposeVisit(fetchResponse.location, visitOptions);
        }
      }
    }

    async formSubmissionFailedWithResponse(formSubmission, fetchResponse) {
      const responseHTML = await fetchResponse.responseHTML;

      if (responseHTML) {
        const snapshot = PageSnapshot.fromHTMLString(responseHTML);
        if (fetchResponse.serverError) {
          await this.view.renderError(snapshot, this.currentVisit);
        } else {
          await this.view.renderPage(snapshot, false, true, this.currentVisit);
        }
        if(!snapshot.shouldPreserveScrollPosition) {
          this.view.scrollToTop();
        }
        this.view.clearSnapshotCache();
      }
    }

    formSubmissionErrored(formSubmission, error) {
      console.error(error);
    }

    formSubmissionFinished(formSubmission) {
      // Not all adapters implement formSubmissionFinished
      if (typeof this.adapter.formSubmissionFinished === "function") {
        this.adapter.formSubmissionFinished(formSubmission);
      }
    }

    // Visit delegate

    visitStarted(visit) {
      this.delegate.visitStarted(visit);
    }

    visitCompleted(visit) {
      this.delegate.visitCompleted(visit);
    }

    locationWithActionIsSamePage(location, action) {
      const anchor = getAnchor(location);
      const currentAnchor = getAnchor(this.view.lastRenderedLocation);
      const isRestorationToTop = action === "restore" && typeof anchor === "undefined";

      return (
        action !== "replace" &&
        getRequestURL(location) === getRequestURL(this.view.lastRenderedLocation) &&
        (isRestorationToTop || (anchor != null && anchor !== currentAnchor))
      )
    }

    visitScrolledToSamePageLocation(oldURL, newURL) {
      this.delegate.visitScrolledToSamePageLocation(oldURL, newURL);
    }

    // Visits

    get location() {
      return this.history.location
    }

    get restorationIdentifier() {
      return this.history.restorationIdentifier
    }

    #getActionForFormSubmission(formSubmission, fetchResponse) {
      const { submitter, formElement } = formSubmission;
      return getVisitAction(submitter, formElement) || this.#getDefaultAction(fetchResponse)
    }

    #getDefaultAction(fetchResponse) {
      const sameLocationRedirect = fetchResponse.redirected && fetchResponse.location.href === this.location?.href;
      return sameLocationRedirect ? "replace" : "advance"
    }
  }

  const PageStage = {
    initial: 0,
    loading: 1,
    interactive: 2,
    complete: 3
  };

  class PageObserver {
    stage = PageStage.initial
    started = false

    constructor(delegate) {
      this.delegate = delegate;
    }

    start() {
      if (!this.started) {
        if (this.stage == PageStage.initial) {
          this.stage = PageStage.loading;
        }
        document.addEventListener("readystatechange", this.interpretReadyState, false);
        addEventListener("pagehide", this.pageWillUnload, false);
        this.started = true;
      }
    }

    stop() {
      if (this.started) {
        document.removeEventListener("readystatechange", this.interpretReadyState, false);
        removeEventListener("pagehide", this.pageWillUnload, false);
        this.started = false;
      }
    }

    interpretReadyState = () => {
      const { readyState } = this;
      if (readyState == "interactive") {
        this.pageIsInteractive();
      } else if (readyState == "complete") {
        this.pageIsComplete();
      }
    }

    pageIsInteractive() {
      if (this.stage == PageStage.loading) {
        this.stage = PageStage.interactive;
        this.delegate.pageBecameInteractive();
      }
    }

    pageIsComplete() {
      this.pageIsInteractive();
      if (this.stage == PageStage.interactive) {
        this.stage = PageStage.complete;
        this.delegate.pageLoaded();
      }
    }

    pageWillUnload = () => {
      this.delegate.pageWillUnload();
    }

    get readyState() {
      return document.readyState
    }
  }

  class ScrollObserver {
    started = false

    constructor(delegate) {
      this.delegate = delegate;
    }

    start() {
      if (!this.started) {
        addEventListener("scroll", this.onScroll, false);
        this.onScroll();
        this.started = true;
      }
    }

    stop() {
      if (this.started) {
        removeEventListener("scroll", this.onScroll, false);
        this.started = false;
      }
    }

    onScroll = () => {
      this.updatePosition({ x: window.pageXOffset, y: window.pageYOffset });
    }

    // Private

    updatePosition(position) {
      this.delegate.scrollPositionChanged(position);
    }
  }

  class StreamMessageRenderer {
    render({ fragment }) {
      Bardo.preservingPermanentElements(this, getPermanentElementMapForFragment(fragment), () => {
        withAutofocusFromFragment(fragment, () => {
          withPreservedFocus(() => {
            document.documentElement.appendChild(fragment);
          });
        });
      });
    }

    // Bardo delegate

    enteringBardo(currentPermanentElement, newPermanentElement) {
      newPermanentElement.replaceWith(currentPermanentElement.cloneNode(true));
    }

    leavingBardo() {}
  }

  function getPermanentElementMapForFragment(fragment) {
    const permanentElementsInDocument = queryPermanentElementsAll(document.documentElement);
    const permanentElementMap = {};
    for (const permanentElementInDocument of permanentElementsInDocument) {
      const { id } = permanentElementInDocument;

      for (const streamElement of fragment.querySelectorAll("turbo-stream")) {
        const elementInStream = getPermanentElementById(streamElement.templateElement.content, id);

        if (elementInStream) {
          permanentElementMap[id] = [permanentElementInDocument, elementInStream];
        }
      }
    }

    return permanentElementMap
  }

  async function withAutofocusFromFragment(fragment, callback) {
    const generatedID = `turbo-stream-autofocus-${uuid()}`;
    const turboStreams = fragment.querySelectorAll("turbo-stream");
    const elementWithAutofocus = firstAutofocusableElementInStreams(turboStreams);
    let willAutofocusId = null;

    if (elementWithAutofocus) {
      if (elementWithAutofocus.id) {
        willAutofocusId = elementWithAutofocus.id;
      } else {
        willAutofocusId = generatedID;
      }

      elementWithAutofocus.id = willAutofocusId;
    }

    callback();
    await nextRepaint();

    const hasNoActiveElement = document.activeElement == null || document.activeElement == document.body;

    if (hasNoActiveElement && willAutofocusId) {
      const elementToAutofocus = document.getElementById(willAutofocusId);

      if (elementIsFocusable(elementToAutofocus)) {
        elementToAutofocus.focus();
      }
      if (elementToAutofocus && elementToAutofocus.id == generatedID) {
        elementToAutofocus.removeAttribute("id");
      }
    }
  }

  async function withPreservedFocus(callback) {
    const [activeElementBeforeRender, activeElementAfterRender] = await around(callback, () => document.activeElement);

    const restoreFocusTo = activeElementBeforeRender && activeElementBeforeRender.id;

    if (restoreFocusTo) {
      const elementToFocus = document.getElementById(restoreFocusTo);

      if (elementIsFocusable(elementToFocus) && elementToFocus != activeElementAfterRender) {
        elementToFocus.focus();
      }
    }
  }

  function firstAutofocusableElementInStreams(nodeListOfStreamElements) {
    for (const streamElement of nodeListOfStreamElements) {
      const elementWithAutofocus = queryAutofocusableElement(streamElement.templateElement.content);

      if (elementWithAutofocus) return elementWithAutofocus
    }

    return null
  }

  class StreamObserver {
    sources = new Set()
    #started = false

    constructor(delegate) {
      this.delegate = delegate;
    }

    start() {
      if (!this.#started) {
        this.#started = true;
        addEventListener("turbo:before-fetch-response", this.inspectFetchResponse, false);
      }
    }

    stop() {
      if (this.#started) {
        this.#started = false;
        removeEventListener("turbo:before-fetch-response", this.inspectFetchResponse, false);
      }
    }

    connectStreamSource(source) {
      if (!this.streamSourceIsConnected(source)) {
        this.sources.add(source);
        source.addEventListener("message", this.receiveMessageEvent, false);
      }
    }

    disconnectStreamSource(source) {
      if (this.streamSourceIsConnected(source)) {
        this.sources.delete(source);
        source.removeEventListener("message", this.receiveMessageEvent, false);
      }
    }

    streamSourceIsConnected(source) {
      return this.sources.has(source)
    }

    inspectFetchResponse = (event) => {
      const response = fetchResponseFromEvent(event);
      if (response && fetchResponseIsStream(response)) {
        event.preventDefault();
        this.receiveMessageResponse(response);
      }
    }

    receiveMessageEvent = (event) => {
      if (this.#started && typeof event.data == "string") {
        this.receiveMessageHTML(event.data);
      }
    }

    async receiveMessageResponse(response) {
      const html = await response.responseHTML;
      if (html) {
        this.receiveMessageHTML(html);
      }
    }

    receiveMessageHTML(html) {
      this.delegate.receivedMessageFromStream(StreamMessage.wrap(html));
    }
  }

  function fetchResponseFromEvent(event) {
    const fetchResponse = event.detail?.fetchResponse;
    if (fetchResponse instanceof FetchResponse) {
      return fetchResponse
    }
  }

  function fetchResponseIsStream(response) {
    const contentType = response.contentType ?? "";
    return contentType.startsWith(StreamMessage.contentType)
  }

  class ErrorRenderer extends Renderer {
    static renderElement(currentElement, newElement) {
      const { documentElement, body } = document;

      documentElement.replaceChild(newElement, body);
    }

    async render() {
      this.replaceHeadAndBody();
      this.activateScriptElements();
    }

    replaceHeadAndBody() {
      const { documentElement, head } = document;
      documentElement.replaceChild(this.newHead, head);
      this.renderElement(this.currentElement, this.newElement);
    }

    activateScriptElements() {
      for (const replaceableElement of this.scriptElements) {
        const parentNode = replaceableElement.parentNode;
        if (parentNode) {
          const element = activateScriptElement(replaceableElement);
          parentNode.replaceChild(element, replaceableElement);
        }
      }
    }

    get newHead() {
      return this.newSnapshot.headSnapshot.element
    }

    get scriptElements() {
      return document.documentElement.querySelectorAll("script")
    }
  }

  // base IIFE to define idiomorph
  var Idiomorph = (function () {

          //=============================================================================
          // AND NOW IT BEGINS...
          //=============================================================================
          let EMPTY_SET = new Set();

          // default configuration values, updatable by users now
          let defaults = {
              morphStyle: "outerHTML",
              callbacks : {
                  beforeNodeAdded: noOp,
                  afterNodeAdded: noOp,
                  beforeNodeMorphed: noOp,
                  afterNodeMorphed: noOp,
                  beforeNodeRemoved: noOp,
                  afterNodeRemoved: noOp,
                  beforeAttributeUpdated: noOp,

              },
              head: {
                  style: 'merge',
                  shouldPreserve: function (elt) {
                      return elt.getAttribute("im-preserve") === "true";
                  },
                  shouldReAppend: function (elt) {
                      return elt.getAttribute("im-re-append") === "true";
                  },
                  shouldRemove: noOp,
                  afterHeadMorphed: noOp,
              }
          };

          //=============================================================================
          // Core Morphing Algorithm - morph, morphNormalizedContent, morphOldNodeTo, morphChildren
          //=============================================================================
          function morph(oldNode, newContent, config = {}) {

              if (oldNode instanceof Document) {
                  oldNode = oldNode.documentElement;
              }

              if (typeof newContent === 'string') {
                  newContent = parseContent(newContent);
              }

              let normalizedContent = normalizeContent(newContent);

              let ctx = createMorphContext(oldNode, normalizedContent, config);

              return morphNormalizedContent(oldNode, normalizedContent, ctx);
          }

          function morphNormalizedContent(oldNode, normalizedNewContent, ctx) {
              if (ctx.head.block) {
                  let oldHead = oldNode.querySelector('head');
                  let newHead = normalizedNewContent.querySelector('head');
                  if (oldHead && newHead) {
                      let promises = handleHeadElement(newHead, oldHead, ctx);
                      // when head promises resolve, call morph again, ignoring the head tag
                      Promise.all(promises).then(function () {
                          morphNormalizedContent(oldNode, normalizedNewContent, Object.assign(ctx, {
                              head: {
                                  block: false,
                                  ignore: true
                              }
                          }));
                      });
                      return;
                  }
              }

              if (ctx.morphStyle === "innerHTML") {

                  // innerHTML, so we are only updating the children
                  morphChildren(normalizedNewContent, oldNode, ctx);
                  return oldNode.children;

              } else if (ctx.morphStyle === "outerHTML" || ctx.morphStyle == null) {
                  // otherwise find the best element match in the new content, morph that, and merge its siblings
                  // into either side of the best match
                  let bestMatch = findBestNodeMatch(normalizedNewContent, oldNode, ctx);

                  // stash the siblings that will need to be inserted on either side of the best match
                  let previousSibling = bestMatch?.previousSibling;
                  let nextSibling = bestMatch?.nextSibling;

                  // morph it
                  let morphedNode = morphOldNodeTo(oldNode, bestMatch, ctx);

                  if (bestMatch) {
                      // if there was a best match, merge the siblings in too and return the
                      // whole bunch
                      return insertSiblings(previousSibling, morphedNode, nextSibling);
                  } else {
                      // otherwise nothing was added to the DOM
                      return []
                  }
              } else {
                  throw "Do not understand how to morph style " + ctx.morphStyle;
              }
          }


          /**
           * @param possibleActiveElement
           * @param ctx
           * @returns {boolean}
           */
          function ignoreValueOfActiveElement(possibleActiveElement, ctx) {
              return ctx.ignoreActiveValue && possibleActiveElement === document.activeElement && possibleActiveElement !== document.body;
          }

          /**
           * @param oldNode root node to merge content into
           * @param newContent new content to merge
           * @param ctx the merge context
           * @returns {Element} the element that ended up in the DOM
           */
          function morphOldNodeTo(oldNode, newContent, ctx) {
              if (ctx.ignoreActive && oldNode === document.activeElement) ; else if (newContent == null) {
                  if (ctx.callbacks.beforeNodeRemoved(oldNode) === false) return oldNode;

                  oldNode.remove();
                  ctx.callbacks.afterNodeRemoved(oldNode);
                  return null;
              } else if (!isSoftMatch(oldNode, newContent)) {
                  if (ctx.callbacks.beforeNodeRemoved(oldNode) === false) return oldNode;
                  if (ctx.callbacks.beforeNodeAdded(newContent) === false) return oldNode;

                  oldNode.parentElement.replaceChild(newContent, oldNode);
                  ctx.callbacks.afterNodeAdded(newContent);
                  ctx.callbacks.afterNodeRemoved(oldNode);
                  return newContent;
              } else {
                  if (ctx.callbacks.beforeNodeMorphed(oldNode, newContent) === false) return oldNode;

                  if (oldNode instanceof HTMLHeadElement && ctx.head.ignore) ; else if (oldNode instanceof HTMLHeadElement && ctx.head.style !== "morph") {
                      handleHeadElement(newContent, oldNode, ctx);
                  } else {
                      syncNodeFrom(newContent, oldNode, ctx);
                      if (!ignoreValueOfActiveElement(oldNode, ctx)) {
                          morphChildren(newContent, oldNode, ctx);
                      }
                  }
                  ctx.callbacks.afterNodeMorphed(oldNode, newContent);
                  return oldNode;
              }
          }

          /**
           * This is the core algorithm for matching up children.  The idea is to use id sets to try to match up
           * nodes as faithfully as possible.  We greedily match, which allows us to keep the algorithm fast, but
           * by using id sets, we are able to better match up with content deeper in the DOM.
           *
           * Basic algorithm is, for each node in the new content:
           *
           * - if we have reached the end of the old parent, append the new content
           * - if the new content has an id set match with the current insertion point, morph
           * - search for an id set match
           * - if id set match found, morph
           * - otherwise search for a "soft" match
           * - if a soft match is found, morph
           * - otherwise, prepend the new node before the current insertion point
           *
           * The two search algorithms terminate if competing node matches appear to outweigh what can be achieved
           * with the current node.  See findIdSetMatch() and findSoftMatch() for details.
           *
           * @param {Element} newParent the parent element of the new content
           * @param {Element } oldParent the old content that we are merging the new content into
           * @param ctx the merge context
           */
          function morphChildren(newParent, oldParent, ctx) {

              let nextNewChild = newParent.firstChild;
              let insertionPoint = oldParent.firstChild;
              let newChild;

              // run through all the new content
              while (nextNewChild) {

                  newChild = nextNewChild;
                  nextNewChild = newChild.nextSibling;

                  // if we are at the end of the exiting parent's children, just append
                  if (insertionPoint == null) {
                      if (ctx.callbacks.beforeNodeAdded(newChild) === false) return;

                      oldParent.appendChild(newChild);
                      ctx.callbacks.afterNodeAdded(newChild);
                      removeIdsFromConsideration(ctx, newChild);
                      continue;
                  }

                  // if the current node has an id set match then morph
                  if (isIdSetMatch(newChild, insertionPoint, ctx)) {
                      morphOldNodeTo(insertionPoint, newChild, ctx);
                      insertionPoint = insertionPoint.nextSibling;
                      removeIdsFromConsideration(ctx, newChild);
                      continue;
                  }

                  // otherwise search forward in the existing old children for an id set match
                  let idSetMatch = findIdSetMatch(newParent, oldParent, newChild, insertionPoint, ctx);

                  // if we found a potential match, remove the nodes until that point and morph
                  if (idSetMatch) {
                      insertionPoint = removeNodesBetween(insertionPoint, idSetMatch, ctx);
                      morphOldNodeTo(idSetMatch, newChild, ctx);
                      removeIdsFromConsideration(ctx, newChild);
                      continue;
                  }

                  // no id set match found, so scan forward for a soft match for the current node
                  let softMatch = findSoftMatch(newParent, oldParent, newChild, insertionPoint, ctx);

                  // if we found a soft match for the current node, morph
                  if (softMatch) {
                      insertionPoint = removeNodesBetween(insertionPoint, softMatch, ctx);
                      morphOldNodeTo(softMatch, newChild, ctx);
                      removeIdsFromConsideration(ctx, newChild);
                      continue;
                  }

                  // abandon all hope of morphing, just insert the new child before the insertion point
                  // and move on
                  if (ctx.callbacks.beforeNodeAdded(newChild) === false) return;

                  oldParent.insertBefore(newChild, insertionPoint);
                  ctx.callbacks.afterNodeAdded(newChild);
                  removeIdsFromConsideration(ctx, newChild);
              }

              // remove any remaining old nodes that didn't match up with new content
              while (insertionPoint !== null) {

                  let tempNode = insertionPoint;
                  insertionPoint = insertionPoint.nextSibling;
                  removeNode(tempNode, ctx);
              }
          }

          //=============================================================================
          // Attribute Syncing Code
          //=============================================================================

          /**
           * @param attr {String} the attribute to be mutated
           * @param to {Element} the element that is going to be updated
           * @param updateType {("update"|"remove")}
           * @param ctx the merge context
           * @returns {boolean} true if the attribute should be ignored, false otherwise
           */
          function ignoreAttribute(attr, to, updateType, ctx) {
              if(attr === 'value' && ctx.ignoreActiveValue && to === document.activeElement){
                  return true;
              }
              return ctx.callbacks.beforeAttributeUpdated(attr, to, updateType) === false;
          }

          /**
           * syncs a given node with another node, copying over all attributes and
           * inner element state from the 'from' node to the 'to' node
           *
           * @param {Element} from the element to copy attributes & state from
           * @param {Element} to the element to copy attributes & state to
           * @param ctx the merge context
           */
          function syncNodeFrom(from, to, ctx) {
              let type = from.nodeType;

              // if is an element type, sync the attributes from the
              // new node into the new node
              if (type === 1 /* element type */) {
                  const fromAttributes = from.attributes;
                  const toAttributes = to.attributes;
                  for (const fromAttribute of fromAttributes) {
                      if (ignoreAttribute(fromAttribute.name, to, 'update', ctx)) {
                          continue;
                      }
                      if (to.getAttribute(fromAttribute.name) !== fromAttribute.value) {
                          to.setAttribute(fromAttribute.name, fromAttribute.value);
                      }
                  }
                  // iterate backwards to avoid skipping over items when a delete occurs
                  for (let i = toAttributes.length - 1; 0 <= i; i--) {
                      const toAttribute = toAttributes[i];
                      if (ignoreAttribute(toAttribute.name, to, 'remove', ctx)) {
                          continue;
                      }
                      if (!from.hasAttribute(toAttribute.name)) {
                          to.removeAttribute(toAttribute.name);
                      }
                  }
              }

              // sync text nodes
              if (type === 8 /* comment */ || type === 3 /* text */) {
                  if (to.nodeValue !== from.nodeValue) {
                      to.nodeValue = from.nodeValue;
                  }
              }

              if (!ignoreValueOfActiveElement(to, ctx)) {
                  // sync input values
                  syncInputValue(from, to, ctx);
              }
          }

          /**
           * @param from {Element} element to sync the value from
           * @param to {Element} element to sync the value to
           * @param attributeName {String} the attribute name
           * @param ctx the merge context
           */
          function syncBooleanAttribute(from, to, attributeName, ctx) {
              if (from[attributeName] !== to[attributeName]) {
                  let ignoreUpdate = ignoreAttribute(attributeName, to, 'update', ctx);
                  if (!ignoreUpdate) {
                      to[attributeName] = from[attributeName];
                  }
                  if (from[attributeName]) {
                      if (!ignoreUpdate) {
                          to.setAttribute(attributeName, from[attributeName]);
                      }
                  } else {
                      if (!ignoreAttribute(attributeName, to, 'remove', ctx)) {
                          to.removeAttribute(attributeName);
                      }
                  }
              }
          }

          /**
           * NB: many bothans died to bring us information:
           *
           *  https://github.com/patrick-steele-idem/morphdom/blob/master/src/specialElHandlers.js
           *  https://github.com/choojs/nanomorph/blob/master/lib/morph.jsL113
           *
           * @param from {Element} the element to sync the input value from
           * @param to {Element} the element to sync the input value to
           * @param ctx the merge context
           */
          function syncInputValue(from, to, ctx) {
              if (from instanceof HTMLInputElement &&
                  to instanceof HTMLInputElement &&
                  from.type !== 'file') {

                  let fromValue = from.value;
                  let toValue = to.value;

                  // sync boolean attributes
                  syncBooleanAttribute(from, to, 'checked', ctx);
                  syncBooleanAttribute(from, to, 'disabled', ctx);

                  if (!from.hasAttribute('value')) {
                      if (!ignoreAttribute('value', to, 'remove', ctx)) {
                          to.value = '';
                          to.removeAttribute('value');
                      }
                  } else if (fromValue !== toValue) {
                      if (!ignoreAttribute('value', to, 'update', ctx)) {
                          to.setAttribute('value', fromValue);
                          to.value = fromValue;
                      }
                  }
              } else if (from instanceof HTMLOptionElement) {
                  syncBooleanAttribute(from, to, 'selected', ctx);
              } else if (from instanceof HTMLTextAreaElement && to instanceof HTMLTextAreaElement) {
                  let fromValue = from.value;
                  let toValue = to.value;
                  if (ignoreAttribute('value', to, 'update', ctx)) {
                      return;
                  }
                  if (fromValue !== toValue) {
                      to.value = fromValue;
                  }
                  if (to.firstChild && to.firstChild.nodeValue !== fromValue) {
                      to.firstChild.nodeValue = fromValue;
                  }
              }
          }

          //=============================================================================
          // the HEAD tag can be handled specially, either w/ a 'merge' or 'append' style
          //=============================================================================
          function handleHeadElement(newHeadTag, currentHead, ctx) {

              let added = [];
              let removed = [];
              let preserved = [];
              let nodesToAppend = [];

              let headMergeStyle = ctx.head.style;

              // put all new head elements into a Map, by their outerHTML
              let srcToNewHeadNodes = new Map();
              for (const newHeadChild of newHeadTag.children) {
                  srcToNewHeadNodes.set(newHeadChild.outerHTML, newHeadChild);
              }

              // for each elt in the current head
              for (const currentHeadElt of currentHead.children) {

                  // If the current head element is in the map
                  let inNewContent = srcToNewHeadNodes.has(currentHeadElt.outerHTML);
                  let isReAppended = ctx.head.shouldReAppend(currentHeadElt);
                  let isPreserved = ctx.head.shouldPreserve(currentHeadElt);
                  if (inNewContent || isPreserved) {
                      if (isReAppended) {
                          // remove the current version and let the new version replace it and re-execute
                          removed.push(currentHeadElt);
                      } else {
                          // this element already exists and should not be re-appended, so remove it from
                          // the new content map, preserving it in the DOM
                          srcToNewHeadNodes.delete(currentHeadElt.outerHTML);
                          preserved.push(currentHeadElt);
                      }
                  } else {
                      if (headMergeStyle === "append") {
                          // we are appending and this existing element is not new content
                          // so if and only if it is marked for re-append do we do anything
                          if (isReAppended) {
                              removed.push(currentHeadElt);
                              nodesToAppend.push(currentHeadElt);
                          }
                      } else {
                          // if this is a merge, we remove this content since it is not in the new head
                          if (ctx.head.shouldRemove(currentHeadElt) !== false) {
                              removed.push(currentHeadElt);
                          }
                      }
                  }
              }

              // Push the remaining new head elements in the Map into the
              // nodes to append to the head tag
              nodesToAppend.push(...srcToNewHeadNodes.values());

              let promises = [];
              for (const newNode of nodesToAppend) {
                  let newElt = document.createRange().createContextualFragment(newNode.outerHTML).firstChild;
                  if (ctx.callbacks.beforeNodeAdded(newElt) !== false) {
                      if (newElt.href || newElt.src) {
                          let resolve = null;
                          let promise = new Promise(function (_resolve) {
                              resolve = _resolve;
                          });
                          newElt.addEventListener('load', function () {
                              resolve();
                          });
                          promises.push(promise);
                      }
                      currentHead.appendChild(newElt);
                      ctx.callbacks.afterNodeAdded(newElt);
                      added.push(newElt);
                  }
              }

              // remove all removed elements, after we have appended the new elements to avoid
              // additional network requests for things like style sheets
              for (const removedElement of removed) {
                  if (ctx.callbacks.beforeNodeRemoved(removedElement) !== false) {
                      currentHead.removeChild(removedElement);
                      ctx.callbacks.afterNodeRemoved(removedElement);
                  }
              }

              ctx.head.afterHeadMorphed(currentHead, {added: added, kept: preserved, removed: removed});
              return promises;
          }

          function noOp() {
          }

          /*
            Deep merges the config object and the Idiomoroph.defaults object to
            produce a final configuration object
           */
          function mergeDefaults(config) {
              let finalConfig = {};
              // copy top level stuff into final config
              Object.assign(finalConfig, defaults);
              Object.assign(finalConfig, config);

              // copy callbacks into final config (do this to deep merge the callbacks)
              finalConfig.callbacks = {};
              Object.assign(finalConfig.callbacks, defaults.callbacks);
              Object.assign(finalConfig.callbacks, config.callbacks);

              // copy head config into final config  (do this to deep merge the head)
              finalConfig.head = {};
              Object.assign(finalConfig.head, defaults.head);
              Object.assign(finalConfig.head, config.head);
              return finalConfig;
          }

          function createMorphContext(oldNode, newContent, config) {
              config = mergeDefaults(config);
              return {
                  target: oldNode,
                  newContent: newContent,
                  config: config,
                  morphStyle: config.morphStyle,
                  ignoreActive: config.ignoreActive,
                  ignoreActiveValue: config.ignoreActiveValue,
                  idMap: createIdMap(oldNode, newContent),
                  deadIds: new Set(),
                  callbacks: config.callbacks,
                  head: config.head
              }
          }

          function isIdSetMatch(node1, node2, ctx) {
              if (node1 == null || node2 == null) {
                  return false;
              }
              if (node1.nodeType === node2.nodeType && node1.tagName === node2.tagName) {
                  if (node1.id !== "" && node1.id === node2.id) {
                      return true;
                  } else {
                      return getIdIntersectionCount(ctx, node1, node2) > 0;
                  }
              }
              return false;
          }

          function isSoftMatch(node1, node2) {
              if (node1 == null || node2 == null) {
                  return false;
              }
              return node1.nodeType === node2.nodeType && node1.tagName === node2.tagName
          }

          function removeNodesBetween(startInclusive, endExclusive, ctx) {
              while (startInclusive !== endExclusive) {
                  let tempNode = startInclusive;
                  startInclusive = startInclusive.nextSibling;
                  removeNode(tempNode, ctx);
              }
              removeIdsFromConsideration(ctx, endExclusive);
              return endExclusive.nextSibling;
          }

          //=============================================================================
          // Scans forward from the insertionPoint in the old parent looking for a potential id match
          // for the newChild.  We stop if we find a potential id match for the new child OR
          // if the number of potential id matches we are discarding is greater than the
          // potential id matches for the new child
          //=============================================================================
          function findIdSetMatch(newContent, oldParent, newChild, insertionPoint, ctx) {

              // max id matches we are willing to discard in our search
              let newChildPotentialIdCount = getIdIntersectionCount(ctx, newChild, oldParent);

              let potentialMatch = null;

              // only search forward if there is a possibility of an id match
              if (newChildPotentialIdCount > 0) {
                  let potentialMatch = insertionPoint;
                  // if there is a possibility of an id match, scan forward
                  // keep track of the potential id match count we are discarding (the
                  // newChildPotentialIdCount must be greater than this to make it likely
                  // worth it)
                  let otherMatchCount = 0;
                  while (potentialMatch != null) {

                      // If we have an id match, return the current potential match
                      if (isIdSetMatch(newChild, potentialMatch, ctx)) {
                          return potentialMatch;
                      }

                      // computer the other potential matches of this new content
                      otherMatchCount += getIdIntersectionCount(ctx, potentialMatch, newContent);
                      if (otherMatchCount > newChildPotentialIdCount) {
                          // if we have more potential id matches in _other_ content, we
                          // do not have a good candidate for an id match, so return null
                          return null;
                      }

                      // advanced to the next old content child
                      potentialMatch = potentialMatch.nextSibling;
                  }
              }
              return potentialMatch;
          }

          //=============================================================================
          // Scans forward from the insertionPoint in the old parent looking for a potential soft match
          // for the newChild.  We stop if we find a potential soft match for the new child OR
          // if we find a potential id match in the old parents children OR if we find two
          // potential soft matches for the next two pieces of new content
          //=============================================================================
          function findSoftMatch(newContent, oldParent, newChild, insertionPoint, ctx) {

              let potentialSoftMatch = insertionPoint;
              let nextSibling = newChild.nextSibling;
              let siblingSoftMatchCount = 0;

              while (potentialSoftMatch != null) {

                  if (getIdIntersectionCount(ctx, potentialSoftMatch, newContent) > 0) {
                      // the current potential soft match has a potential id set match with the remaining new
                      // content so bail out of looking
                      return null;
                  }

                  // if we have a soft match with the current node, return it
                  if (isSoftMatch(newChild, potentialSoftMatch)) {
                      return potentialSoftMatch;
                  }

                  if (isSoftMatch(nextSibling, potentialSoftMatch)) {
                      // the next new node has a soft match with this node, so
                      // increment the count of future soft matches
                      siblingSoftMatchCount++;
                      nextSibling = nextSibling.nextSibling;

                      // If there are two future soft matches, bail to allow the siblings to soft match
                      // so that we don't consume future soft matches for the sake of the current node
                      if (siblingSoftMatchCount >= 2) {
                          return null;
                      }
                  }

                  // advanced to the next old content child
                  potentialSoftMatch = potentialSoftMatch.nextSibling;
              }

              return potentialSoftMatch;
          }

          function parseContent(newContent) {
              let parser = new DOMParser();

              // remove svgs to avoid false-positive matches on head, etc.
              let contentWithSvgsRemoved = newContent.replace(/<svg(\s[^>]*>|>)([\s\S]*?)<\/svg>/gim, '');

              // if the newContent contains a html, head or body tag, we can simply parse it w/o wrapping
              if (contentWithSvgsRemoved.match(/<\/html>/) || contentWithSvgsRemoved.match(/<\/head>/) || contentWithSvgsRemoved.match(/<\/body>/)) {
                  let content = parser.parseFromString(newContent, "text/html");
                  // if it is a full HTML document, return the document itself as the parent container
                  if (contentWithSvgsRemoved.match(/<\/html>/)) {
                      content.generatedByIdiomorph = true;
                      return content;
                  } else {
                      // otherwise return the html element as the parent container
                      let htmlElement = content.firstChild;
                      if (htmlElement) {
                          htmlElement.generatedByIdiomorph = true;
                          return htmlElement;
                      } else {
                          return null;
                      }
                  }
              } else {
                  // if it is partial HTML, wrap it in a template tag to provide a parent element and also to help
                  // deal with touchy tags like tr, tbody, etc.
                  let responseDoc = parser.parseFromString("<body><template>" + newContent + "</template></body>", "text/html");
                  let content = responseDoc.body.querySelector('template').content;
                  content.generatedByIdiomorph = true;
                  return content
              }
          }

          function normalizeContent(newContent) {
              if (newContent == null) {
                  // noinspection UnnecessaryLocalVariableJS
                  const dummyParent = document.createElement('div');
                  return dummyParent;
              } else if (newContent.generatedByIdiomorph) {
                  // the template tag created by idiomorph parsing can serve as a dummy parent
                  return newContent;
              } else if (newContent instanceof Node) {
                  // a single node is added as a child to a dummy parent
                  const dummyParent = document.createElement('div');
                  dummyParent.append(newContent);
                  return dummyParent;
              } else {
                  // all nodes in the array or HTMLElement collection are consolidated under
                  // a single dummy parent element
                  const dummyParent = document.createElement('div');
                  for (const elt of [...newContent]) {
                      dummyParent.append(elt);
                  }
                  return dummyParent;
              }
          }

          function insertSiblings(previousSibling, morphedNode, nextSibling) {
              let stack = [];
              let added = [];
              while (previousSibling != null) {
                  stack.push(previousSibling);
                  previousSibling = previousSibling.previousSibling;
              }
              while (stack.length > 0) {
                  let node = stack.pop();
                  added.push(node); // push added preceding siblings on in order and insert
                  morphedNode.parentElement.insertBefore(node, morphedNode);
              }
              added.push(morphedNode);
              while (nextSibling != null) {
                  stack.push(nextSibling);
                  added.push(nextSibling); // here we are going in order, so push on as we scan, rather than add
                  nextSibling = nextSibling.nextSibling;
              }
              while (stack.length > 0) {
                  morphedNode.parentElement.insertBefore(stack.pop(), morphedNode.nextSibling);
              }
              return added;
          }

          function findBestNodeMatch(newContent, oldNode, ctx) {
              let currentElement;
              currentElement = newContent.firstChild;
              let bestElement = currentElement;
              let score = 0;
              while (currentElement) {
                  let newScore = scoreElement(currentElement, oldNode, ctx);
                  if (newScore > score) {
                      bestElement = currentElement;
                      score = newScore;
                  }
                  currentElement = currentElement.nextSibling;
              }
              return bestElement;
          }

          function scoreElement(node1, node2, ctx) {
              if (isSoftMatch(node1, node2)) {
                  return .5 + getIdIntersectionCount(ctx, node1, node2);
              }
              return 0;
          }

          function removeNode(tempNode, ctx) {
              removeIdsFromConsideration(ctx, tempNode);
              if (ctx.callbacks.beforeNodeRemoved(tempNode) === false) return;

              tempNode.remove();
              ctx.callbacks.afterNodeRemoved(tempNode);
          }

          //=============================================================================
          // ID Set Functions
          //=============================================================================

          function isIdInConsideration(ctx, id) {
              return !ctx.deadIds.has(id);
          }

          function idIsWithinNode(ctx, id, targetNode) {
              let idSet = ctx.idMap.get(targetNode) || EMPTY_SET;
              return idSet.has(id);
          }

          function removeIdsFromConsideration(ctx, node) {
              let idSet = ctx.idMap.get(node) || EMPTY_SET;
              for (const id of idSet) {
                  ctx.deadIds.add(id);
              }
          }

          function getIdIntersectionCount(ctx, node1, node2) {
              let sourceSet = ctx.idMap.get(node1) || EMPTY_SET;
              let matchCount = 0;
              for (const id of sourceSet) {
                  // a potential match is an id in the source and potentialIdsSet, but
                  // that has not already been merged into the DOM
                  if (isIdInConsideration(ctx, id) && idIsWithinNode(ctx, id, node2)) {
                      ++matchCount;
                  }
              }
              return matchCount;
          }

          /**
           * A bottom up algorithm that finds all elements with ids inside of the node
           * argument and populates id sets for those nodes and all their parents, generating
           * a set of ids contained within all nodes for the entire hierarchy in the DOM
           *
           * @param node {Element}
           * @param {Map<Node, Set<String>>} idMap
           */
          function populateIdMapForNode(node, idMap) {
              let nodeParent = node.parentElement;
              // find all elements with an id property
              let idElements = node.querySelectorAll('[id]');
              for (const elt of idElements) {
                  let current = elt;
                  // walk up the parent hierarchy of that element, adding the id
                  // of element to the parent's id set
                  while (current !== nodeParent && current != null) {
                      let idSet = idMap.get(current);
                      // if the id set doesn't exist, create it and insert it in the  map
                      if (idSet == null) {
                          idSet = new Set();
                          idMap.set(current, idSet);
                      }
                      idSet.add(elt.id);
                      current = current.parentElement;
                  }
              }
          }

          /**
           * This function computes a map of nodes to all ids contained within that node (inclusive of the
           * node).  This map can be used to ask if two nodes have intersecting sets of ids, which allows
           * for a looser definition of "matching" than tradition id matching, and allows child nodes
           * to contribute to a parent nodes matching.
           *
           * @param {Element} oldContent  the old content that will be morphed
           * @param {Element} newContent  the new content to morph to
           * @returns {Map<Node, Set<String>>} a map of nodes to id sets for the
           */
          function createIdMap(oldContent, newContent) {
              let idMap = new Map();
              populateIdMapForNode(oldContent, idMap);
              populateIdMapForNode(newContent, idMap);
              return idMap;
          }

          //=============================================================================
          // This is what ends up becoming the Idiomorph global object
          //=============================================================================
          return {
              morph,
              defaults
          }
      })();

  class PageRenderer extends Renderer {
    static renderElement(currentElement, newElement) {
      if (document.body && newElement instanceof HTMLBodyElement) {
        document.body.replaceWith(newElement);
      } else {
        document.documentElement.appendChild(newElement);
      }
    }

    get shouldRender() {
      return this.newSnapshot.isVisitable && this.trackedElementsAreIdentical
    }

    get reloadReason() {
      if (!this.newSnapshot.isVisitable) {
        return {
          reason: "turbo_visit_control_is_reload"
        }
      }

      if (!this.trackedElementsAreIdentical) {
        return {
          reason: "tracked_element_mismatch"
        }
      }
    }

    async prepareToRender() {
      this.#setLanguage();
      await this.mergeHead();
    }

    async render() {
      if (this.willRender) {
        await this.replaceBody();
      }
    }

    finishRendering() {
      super.finishRendering();
      if (!this.isPreview) {
        this.focusFirstAutofocusableElement();
      }
    }

    get currentHeadSnapshot() {
      return this.currentSnapshot.headSnapshot
    }

    get newHeadSnapshot() {
      return this.newSnapshot.headSnapshot
    }

    get newElement() {
      return this.newSnapshot.element
    }

    #setLanguage() {
      const { documentElement } = this.currentSnapshot;
      const { lang } = this.newSnapshot;

      if (lang) {
        documentElement.setAttribute("lang", lang);
      } else {
        documentElement.removeAttribute("lang");
      }
    }

    async mergeHead() {
      const mergedHeadElements = this.mergeProvisionalElements();
      const newStylesheetElements = this.copyNewHeadStylesheetElements();
      this.copyNewHeadScriptElements();

      await mergedHeadElements;
      await newStylesheetElements;

      if (this.willRender) {
        this.removeUnusedDynamicStylesheetElements();
      }
    }

    async replaceBody() {
      await this.preservingPermanentElements(async () => {
        this.activateNewBody();
        await this.assignNewBody();
      });
    }

    get trackedElementsAreIdentical() {
      return this.currentHeadSnapshot.trackedElementSignature == this.newHeadSnapshot.trackedElementSignature
    }

    async copyNewHeadStylesheetElements() {
      const loadingElements = [];

      for (const element of this.newHeadStylesheetElements) {
        loadingElements.push(waitForLoad(element));

        document.head.appendChild(element);
      }

      await Promise.all(loadingElements);
    }

    copyNewHeadScriptElements() {
      for (const element of this.newHeadScriptElements) {
        document.head.appendChild(activateScriptElement(element));
      }
    }

    removeUnusedDynamicStylesheetElements() {
      for (const element of this.unusedDynamicStylesheetElements) {
        document.head.removeChild(element);
      }
    }

    async mergeProvisionalElements() {
      const newHeadElements = [...this.newHeadProvisionalElements];

      for (const element of this.currentHeadProvisionalElements) {
        if (!this.isCurrentElementInElementList(element, newHeadElements)) {
          document.head.removeChild(element);
        }
      }

      for (const element of newHeadElements) {
        document.head.appendChild(element);
      }
    }

    isCurrentElementInElementList(element, elementList) {
      for (const [index, newElement] of elementList.entries()) {
        // if title element...
        if (element.tagName == "TITLE") {
          if (newElement.tagName != "TITLE") {
            continue
          }
          if (element.innerHTML == newElement.innerHTML) {
            elementList.splice(index, 1);
            return true
          }
        }

        // if any other element...
        if (newElement.isEqualNode(element)) {
          elementList.splice(index, 1);
          return true
        }
      }

      return false
    }

    removeCurrentHeadProvisionalElements() {
      for (const element of this.currentHeadProvisionalElements) {
        document.head.removeChild(element);
      }
    }

    copyNewHeadProvisionalElements() {
      for (const element of this.newHeadProvisionalElements) {
        document.head.appendChild(element);
      }
    }

    activateNewBody() {
      document.adoptNode(this.newElement);
      this.activateNewBodyScriptElements();
    }

    activateNewBodyScriptElements() {
      for (const inertScriptElement of this.newBodyScriptElements) {
        const activatedScriptElement = activateScriptElement(inertScriptElement);
        inertScriptElement.replaceWith(activatedScriptElement);
      }
    }

    async assignNewBody() {
      await this.renderElement(this.currentElement, this.newElement);
    }

    get unusedDynamicStylesheetElements() {
      return this.oldHeadStylesheetElements.filter((element) => {
        return element.getAttribute("data-turbo-track") === "dynamic"
      })
    }

    get oldHeadStylesheetElements() {
      return this.currentHeadSnapshot.getStylesheetElementsNotInSnapshot(this.newHeadSnapshot)
    }

    get newHeadStylesheetElements() {
      return this.newHeadSnapshot.getStylesheetElementsNotInSnapshot(this.currentHeadSnapshot)
    }

    get newHeadScriptElements() {
      return this.newHeadSnapshot.getScriptElementsNotInSnapshot(this.currentHeadSnapshot)
    }

    get currentHeadProvisionalElements() {
      return this.currentHeadSnapshot.provisionalElements
    }

    get newHeadProvisionalElements() {
      return this.newHeadSnapshot.provisionalElements
    }

    get newBodyScriptElements() {
      return this.newElement.querySelectorAll("script")
    }
  }

  class MorphRenderer extends PageRenderer {
    async render() {
      if (this.willRender) await this.#morphBody();
    }

    get renderMethod() {
      return "morph"
    }

    // Private

    async #morphBody() {
      this.#morphElements(this.currentElement, this.newElement);
      this.#reloadRemoteFrames();

      dispatch("turbo:morph", {
        detail: {
          currentElement: this.currentElement,
          newElement: this.newElement
        }
      });
    }

    #morphElements(currentElement, newElement, morphStyle = "outerHTML") {
      this.isMorphingTurboFrame = this.#isFrameReloadedWithMorph(currentElement);

      Idiomorph.morph(currentElement, newElement, {
        morphStyle: morphStyle,
        callbacks: {
          beforeNodeAdded: this.#shouldAddElement,
          beforeNodeMorphed: this.#shouldMorphElement,
          beforeAttributeUpdated: this.#shouldUpdateAttribute,
          beforeNodeRemoved: this.#shouldRemoveElement,
          afterNodeMorphed: this.#didMorphElement
        }
      });
    }

    #shouldAddElement = (node) => {
      return !(node.id && node.hasAttribute("data-turbo-permanent") && document.getElementById(node.id))
    }

    #shouldMorphElement = (oldNode, newNode) => {
      if (oldNode instanceof HTMLElement) {
        if (!oldNode.hasAttribute("data-turbo-permanent") && (this.isMorphingTurboFrame || !this.#isFrameReloadedWithMorph(oldNode))) {
          const event = dispatch("turbo:before-morph-element", {
            cancelable: true,
            target: oldNode,
            detail: {
              newElement: newNode
            }
          });

          return !event.defaultPrevented
        } else {
          return false
        }
      }
    }

    #shouldUpdateAttribute = (attributeName, target, mutationType) => {
      const event = dispatch("turbo:before-morph-attribute", { cancelable: true, target, detail: { attributeName, mutationType } });

      return !event.defaultPrevented
    }

    #didMorphElement = (oldNode, newNode) => {
      if (newNode instanceof HTMLElement) {
        dispatch("turbo:morph-element", {
          target: oldNode,
          detail: {
            newElement: newNode
          }
        });
      }
    }

    #shouldRemoveElement = (node) => {
      return this.#shouldMorphElement(node)
    }

    #reloadRemoteFrames() {
      this.#remoteFrames().forEach((frame) => {
        if (this.#isFrameReloadedWithMorph(frame)) {
          this.#renderFrameWithMorph(frame);
          frame.reload();
        }
      });
    }

    #renderFrameWithMorph(frame) {
      frame.addEventListener("turbo:before-frame-render", (event) => {
        event.detail.render = this.#morphFrameUpdate;
      }, { once: true });
    }

    #morphFrameUpdate = (currentElement, newElement) => {
      dispatch("turbo:before-frame-morph", {
        target: currentElement,
        detail: { currentElement, newElement }
      });
      this.#morphElements(currentElement, newElement.children, "innerHTML");
    }

    #isFrameReloadedWithMorph(element) {
      return element.src && element.refresh === "morph"
    }

    #remoteFrames() {
      return Array.from(document.querySelectorAll('turbo-frame[src]')).filter(frame => {
        return !frame.closest('[data-turbo-permanent]')
      })
    }
  }

  class SnapshotCache {
    keys = []
    snapshots = {}

    constructor(size) {
      this.size = size;
    }

    has(location) {
      return toCacheKey(location) in this.snapshots
    }

    get(location) {
      if (this.has(location)) {
        const snapshot = this.read(location);
        this.touch(location);
        return snapshot
      }
    }

    put(location, snapshot) {
      this.write(location, snapshot);
      this.touch(location);
      return snapshot
    }

    clear() {
      this.snapshots = {};
    }

    // Private

    read(location) {
      return this.snapshots[toCacheKey(location)]
    }

    write(location, snapshot) {
      this.snapshots[toCacheKey(location)] = snapshot;
    }

    touch(location) {
      const key = toCacheKey(location);
      const index = this.keys.indexOf(key);
      if (index > -1) this.keys.splice(index, 1);
      this.keys.unshift(key);
      this.trim();
    }

    trim() {
      for (const key of this.keys.splice(this.size)) {
        delete this.snapshots[key];
      }
    }
  }

  class PageView extends View {
    snapshotCache = new SnapshotCache(10)
    lastRenderedLocation = new URL(location.href)
    forceReloaded = false

    shouldTransitionTo(newSnapshot) {
      return this.snapshot.prefersViewTransitions && newSnapshot.prefersViewTransitions
    }

    renderPage(snapshot, isPreview = false, willRender = true, visit) {
      const shouldMorphPage = this.isPageRefresh(visit) && this.snapshot.shouldMorphPage;
      const rendererClass = shouldMorphPage ? MorphRenderer : PageRenderer;

      const renderer = new rendererClass(this.snapshot, snapshot, PageRenderer.renderElement, isPreview, willRender);

      if (!renderer.shouldRender) {
        this.forceReloaded = true;
      } else {
        visit?.changeHistory();
      }

      return this.render(renderer)
    }

    renderError(snapshot, visit) {
      visit?.changeHistory();
      const renderer = new ErrorRenderer(this.snapshot, snapshot, ErrorRenderer.renderElement, false);
      return this.render(renderer)
    }

    clearSnapshotCache() {
      this.snapshotCache.clear();
    }

    async cacheSnapshot(snapshot = this.snapshot) {
      if (snapshot.isCacheable) {
        this.delegate.viewWillCacheSnapshot();
        const { lastRenderedLocation: location } = this;
        await nextEventLoopTick();
        const cachedSnapshot = snapshot.clone();
        this.snapshotCache.put(location, cachedSnapshot);
        return cachedSnapshot
      }
    }

    getCachedSnapshotForLocation(location) {
      return this.snapshotCache.get(location)
    }

    isPageRefresh(visit) {
      return !visit || (this.lastRenderedLocation.pathname === visit.location.pathname && visit.action === "replace")
    }

    shouldPreserveScrollPosition(visit) {
      return this.isPageRefresh(visit) && this.snapshot.shouldPreserveScrollPosition
    }

    get snapshot() {
      return PageSnapshot.fromElement(this.element)
    }
  }

  class Preloader {
    selector = "a[data-turbo-preload]"

    constructor(delegate, snapshotCache) {
      this.delegate = delegate;
      this.snapshotCache = snapshotCache;
    }

    start() {
      if (document.readyState === "loading") {
        document.addEventListener("DOMContentLoaded", this.#preloadAll);
      } else {
        this.preloadOnLoadLinksForView(document.body);
      }
    }

    stop() {
      document.removeEventListener("DOMContentLoaded", this.#preloadAll);
    }

    preloadOnLoadLinksForView(element) {
      for (const link of element.querySelectorAll(this.selector)) {
        if (this.delegate.shouldPreloadLink(link)) {
          this.preloadURL(link);
        }
      }
    }

    async preloadURL(link) {
      const location = new URL(link.href);

      if (this.snapshotCache.has(location)) {
        return
      }

      const fetchRequest = new FetchRequest(this, FetchMethod.get, location, new URLSearchParams(), link);
      await fetchRequest.perform();
    }

    // Fetch request delegate

    prepareRequest(fetchRequest) {
      fetchRequest.headers["X-Sec-Purpose"] = "prefetch";
    }

    async requestSucceededWithResponse(fetchRequest, fetchResponse) {
      try {
        const responseHTML = await fetchResponse.responseHTML;
        const snapshot = PageSnapshot.fromHTMLString(responseHTML);

        this.snapshotCache.put(fetchRequest.url, snapshot);
      } catch (_) {
        // If we cannot preload that is ok!
      }
    }

    requestStarted(fetchRequest) {}

    requestErrored(fetchRequest) {}

    requestFinished(fetchRequest) {}

    requestPreventedHandlingResponse(fetchRequest, fetchResponse) {}

    requestFailedWithResponse(fetchRequest, fetchResponse) {}

    #preloadAll = () => {
      this.preloadOnLoadLinksForView(document.body);
    }
  }

  class Cache {
    constructor(session) {
      this.session = session;
    }

    clear() {
      this.session.clearCache();
    }

    resetCacheControl() {
      this.#setCacheControl("");
    }

    exemptPageFromCache() {
      this.#setCacheControl("no-cache");
    }

    exemptPageFromPreview() {
      this.#setCacheControl("no-preview");
    }

    #setCacheControl(value) {
      setMetaContent("turbo-cache-control", value);
    }
  }

  class Session {
    navigator = new Navigator(this)
    history = new History(this)
    view = new PageView(this, document.documentElement)
    adapter = new BrowserAdapter(this)

    pageObserver = new PageObserver(this)
    cacheObserver = new CacheObserver()
    linkPrefetchObserver = new LinkPrefetchObserver(this, document)
    linkClickObserver = new LinkClickObserver(this, window)
    formSubmitObserver = new FormSubmitObserver(this, document)
    scrollObserver = new ScrollObserver(this)
    streamObserver = new StreamObserver(this)
    formLinkClickObserver = new FormLinkClickObserver(this, document.documentElement)
    frameRedirector = new FrameRedirector(this, document.documentElement)
    streamMessageRenderer = new StreamMessageRenderer()
    cache = new Cache(this)

    drive = true
    enabled = true
    progressBarDelay = 500
    started = false
    formMode = "on"
    #pageRefreshDebouncePeriod = 150

    constructor(recentRequests) {
      this.recentRequests = recentRequests;
      this.preloader = new Preloader(this, this.view.snapshotCache);
      this.debouncedRefresh = this.refresh;
      this.pageRefreshDebouncePeriod = this.pageRefreshDebouncePeriod;
    }

    start() {
      if (!this.started) {
        this.pageObserver.start();
        this.cacheObserver.start();
        this.linkPrefetchObserver.start();
        this.formLinkClickObserver.start();
        this.linkClickObserver.start();
        this.formSubmitObserver.start();
        this.scrollObserver.start();
        this.streamObserver.start();
        this.frameRedirector.start();
        this.history.start();
        this.preloader.start();
        this.started = true;
        this.enabled = true;
      }
    }

    disable() {
      this.enabled = false;
    }

    stop() {
      if (this.started) {
        this.pageObserver.stop();
        this.cacheObserver.stop();
        this.linkPrefetchObserver.stop();
        this.formLinkClickObserver.stop();
        this.linkClickObserver.stop();
        this.formSubmitObserver.stop();
        this.scrollObserver.stop();
        this.streamObserver.stop();
        this.frameRedirector.stop();
        this.history.stop();
        this.preloader.stop();
        this.started = false;
      }
    }

    registerAdapter(adapter) {
      this.adapter = adapter;
    }

    visit(location, options = {}) {
      const frameElement = options.frame ? document.getElementById(options.frame) : null;

      if (frameElement instanceof FrameElement) {
        const action = options.action || getVisitAction(frameElement);

        frameElement.delegate.proposeVisitIfNavigatedWithAction(frameElement, action);
        frameElement.src = location.toString();
      } else {
        this.navigator.proposeVisit(expandURL(location), options);
      }
    }

    refresh(url, requestId) {
      const isRecentRequest = requestId && this.recentRequests.has(requestId);
      if (!isRecentRequest) {
        this.visit(url, { action: "replace", shouldCacheSnapshot: false });
      }
    }

    connectStreamSource(source) {
      this.streamObserver.connectStreamSource(source);
    }

    disconnectStreamSource(source) {
      this.streamObserver.disconnectStreamSource(source);
    }

    renderStreamMessage(message) {
      this.streamMessageRenderer.render(StreamMessage.wrap(message));
    }

    clearCache() {
      this.view.clearSnapshotCache();
    }

    setProgressBarDelay(delay) {
      this.progressBarDelay = delay;
    }

    setFormMode(mode) {
      this.formMode = mode;
    }

    get location() {
      return this.history.location
    }

    get restorationIdentifier() {
      return this.history.restorationIdentifier
    }

    get pageRefreshDebouncePeriod() {
      return this.#pageRefreshDebouncePeriod
    }

    set pageRefreshDebouncePeriod(value) {
      this.refresh = debounce(this.debouncedRefresh.bind(this), value);
      this.#pageRefreshDebouncePeriod = value;
    }

    // Preloader delegate

    shouldPreloadLink(element) {
      const isUnsafe = element.hasAttribute("data-turbo-method");
      const isStream = element.hasAttribute("data-turbo-stream");
      const frameTarget = element.getAttribute("data-turbo-frame");
      const frame = frameTarget == "_top" ?
        null :
        document.getElementById(frameTarget) || findClosestRecursively(element, "turbo-frame:not([disabled])");

      if (isUnsafe || isStream || frame instanceof FrameElement) {
        return false
      } else {
        const location = new URL(element.href);

        return this.elementIsNavigatable(element) && locationIsVisitable(location, this.snapshot.rootLocation)
      }
    }

    // History delegate

    historyPoppedToLocationWithRestorationIdentifierAndDirection(location, restorationIdentifier, direction) {
      if (this.enabled) {
        this.navigator.startVisit(location, restorationIdentifier, {
          action: "restore",
          historyChanged: true,
          direction
        });
      } else {
        this.adapter.pageInvalidated({
          reason: "turbo_disabled"
        });
      }
    }

    // Scroll observer delegate

    scrollPositionChanged(position) {
      this.history.updateRestorationData({ scrollPosition: position });
    }

    // Form click observer delegate

    willSubmitFormLinkToLocation(link, location) {
      return this.elementIsNavigatable(link) && locationIsVisitable(location, this.snapshot.rootLocation)
    }

    submittedFormLinkToLocation() {}

    // Link hover observer delegate

    canPrefetchRequestToLocation(link, location) {
      return (
        this.elementIsNavigatable(link) &&
          locationIsVisitable(location, this.snapshot.rootLocation)
      )
    }

    // Link click observer delegate

    willFollowLinkToLocation(link, location, event) {
      return (
        this.elementIsNavigatable(link) &&
        locationIsVisitable(location, this.snapshot.rootLocation) &&
        this.applicationAllowsFollowingLinkToLocation(link, location, event)
      )
    }

    followedLinkToLocation(link, location) {
      const action = this.getActionForLink(link);
      const acceptsStreamResponse = link.hasAttribute("data-turbo-stream");

      this.visit(location.href, { action, acceptsStreamResponse });
    }

    // Navigator delegate

    allowsVisitingLocationWithAction(location, action) {
      return this.locationWithActionIsSamePage(location, action) || this.applicationAllowsVisitingLocation(location)
    }

    visitProposedToLocation(location, options) {
      extendURLWithDeprecatedProperties(location);
      this.adapter.visitProposedToLocation(location, options);
    }

    // Visit delegate

    visitStarted(visit) {
      if (!visit.acceptsStreamResponse) {
        markAsBusy(document.documentElement);
        this.view.markVisitDirection(visit.direction);
      }
      extendURLWithDeprecatedProperties(visit.location);
      if (!visit.silent) {
        this.notifyApplicationAfterVisitingLocation(visit.location, visit.action);
      }
    }

    visitCompleted(visit) {
      this.view.unmarkVisitDirection();
      clearBusyState(document.documentElement);
      this.notifyApplicationAfterPageLoad(visit.getTimingMetrics());
    }

    locationWithActionIsSamePage(location, action) {
      return this.navigator.locationWithActionIsSamePage(location, action)
    }

    visitScrolledToSamePageLocation(oldURL, newURL) {
      this.notifyApplicationAfterVisitingSamePageLocation(oldURL, newURL);
    }

    // Form submit observer delegate

    willSubmitForm(form, submitter) {
      const action = getAction$1(form, submitter);

      return (
        this.submissionIsNavigatable(form, submitter) &&
        locationIsVisitable(expandURL(action), this.snapshot.rootLocation)
      )
    }

    formSubmitted(form, submitter) {
      this.navigator.submitForm(form, submitter);
    }

    // Page observer delegate

    pageBecameInteractive() {
      this.view.lastRenderedLocation = this.location;
      this.notifyApplicationAfterPageLoad();
    }

    pageLoaded() {
      this.history.assumeControlOfScrollRestoration();
    }

    pageWillUnload() {
      this.history.relinquishControlOfScrollRestoration();
    }

    // Stream observer delegate

    receivedMessageFromStream(message) {
      this.renderStreamMessage(message);
    }

    // Page view delegate

    viewWillCacheSnapshot() {
      if (!this.navigator.currentVisit?.silent) {
        this.notifyApplicationBeforeCachingSnapshot();
      }
    }

    allowsImmediateRender({ element }, options) {
      const event = this.notifyApplicationBeforeRender(element, options);
      const {
        defaultPrevented,
        detail: { render }
      } = event;

      if (this.view.renderer && render) {
        this.view.renderer.renderElement = render;
      }

      return !defaultPrevented
    }

    viewRenderedSnapshot(_snapshot, _isPreview, renderMethod) {
      this.view.lastRenderedLocation = this.history.location;
      this.notifyApplicationAfterRender(renderMethod);
    }

    preloadOnLoadLinksForView(element) {
      this.preloader.preloadOnLoadLinksForView(element);
    }

    viewInvalidated(reason) {
      this.adapter.pageInvalidated(reason);
    }

    // Frame element

    frameLoaded(frame) {
      this.notifyApplicationAfterFrameLoad(frame);
    }

    frameRendered(fetchResponse, frame) {
      this.notifyApplicationAfterFrameRender(fetchResponse, frame);
    }

    // Application events

    applicationAllowsFollowingLinkToLocation(link, location, ev) {
      const event = this.notifyApplicationAfterClickingLinkToLocation(link, location, ev);
      return !event.defaultPrevented
    }

    applicationAllowsVisitingLocation(location) {
      const event = this.notifyApplicationBeforeVisitingLocation(location);
      return !event.defaultPrevented
    }

    notifyApplicationAfterClickingLinkToLocation(link, location, event) {
      return dispatch("turbo:click", {
        target: link,
        detail: { url: location.href, originalEvent: event },
        cancelable: true
      })
    }

    notifyApplicationBeforeVisitingLocation(location) {
      return dispatch("turbo:before-visit", {
        detail: { url: location.href },
        cancelable: true
      })
    }

    notifyApplicationAfterVisitingLocation(location, action) {
      return dispatch("turbo:visit", { detail: { url: location.href, action } })
    }

    notifyApplicationBeforeCachingSnapshot() {
      return dispatch("turbo:before-cache")
    }

    notifyApplicationBeforeRender(newBody, options) {
      return dispatch("turbo:before-render", {
        detail: { newBody, ...options },
        cancelable: true
      })
    }

    notifyApplicationAfterRender(renderMethod) {
      return dispatch("turbo:render", { detail: { renderMethod } })
    }

    notifyApplicationAfterPageLoad(timing = {}) {
      return dispatch("turbo:load", {
        detail: { url: this.location.href, timing }
      })
    }

    notifyApplicationAfterVisitingSamePageLocation(oldURL, newURL) {
      dispatchEvent(
        new HashChangeEvent("hashchange", {
          oldURL: oldURL.toString(),
          newURL: newURL.toString()
        })
      );
    }

    notifyApplicationAfterFrameLoad(frame) {
      return dispatch("turbo:frame-load", { target: frame })
    }

    notifyApplicationAfterFrameRender(fetchResponse, frame) {
      return dispatch("turbo:frame-render", {
        detail: { fetchResponse },
        target: frame,
        cancelable: true
      })
    }

    // Helpers

    submissionIsNavigatable(form, submitter) {
      if (this.formMode == "off") {
        return false
      } else {
        const submitterIsNavigatable = submitter ? this.elementIsNavigatable(submitter) : true;

        if (this.formMode == "optin") {
          return submitterIsNavigatable && form.closest('[data-turbo="true"]') != null
        } else {
          return submitterIsNavigatable && this.elementIsNavigatable(form)
        }
      }
    }

    elementIsNavigatable(element) {
      const container = findClosestRecursively(element, "[data-turbo]");
      const withinFrame = findClosestRecursively(element, "turbo-frame");

      // Check if Drive is enabled on the session or we're within a Frame.
      if (this.drive || withinFrame) {
        // Element is navigatable by default, unless `data-turbo="false"`.
        if (container) {
          return container.getAttribute("data-turbo") != "false"
        } else {
          return true
        }
      } else {
        // Element isn't navigatable by default, unless `data-turbo="true"`.
        if (container) {
          return container.getAttribute("data-turbo") == "true"
        } else {
          return false
        }
      }
    }

    // Private

    getActionForLink(link) {
      return getVisitAction(link) || "advance"
    }

    get snapshot() {
      return this.view.snapshot
    }
  }

  // Older versions of the Turbo Native adapters referenced the
  // `Location#absoluteURL` property in their implementations of
  // the `Adapter#visitProposedToLocation()` and `#visitStarted()`
  // methods. The Location class has since been removed in favor
  // of the DOM URL API, and accordingly all Adapter methods now
  // receive URL objects.
  //
  // We alias #absoluteURL to #toString() here to avoid crashing
  // older adapters which do not expect URL objects. We should
  // consider removing this support at some point in the future.

  function extendURLWithDeprecatedProperties(url) {
    Object.defineProperties(url, deprecatedLocationPropertyDescriptors);
  }

  const deprecatedLocationPropertyDescriptors = {
    absoluteURL: {
      get() {
        return this.toString()
      }
    }
  };

  const session = new Session(recentRequests);
  const { cache, navigator: navigator$1 } = session;

  /**
   * Starts the main session.
   * This initialises any necessary observers such as those to monitor
   * link interactions.
   */
  function start() {
    session.start();
  }

  /**
   * Registers an adapter for the main session.
   *
   * @param adapter Adapter to register
   */
  function registerAdapter(adapter) {
    session.registerAdapter(adapter);
  }

  /**
   * Performs an application visit to the given location.
   *
   * @param location Location to visit (a URL or path)
   * @param options Options to apply
   * @param options.action Type of history navigation to apply ("restore",
   * "replace" or "advance")
   * @param options.historyChanged Specifies whether the browser history has
   * already been changed for this visit or not
   * @param options.referrer Specifies the referrer of this visit such that
   * navigations to the same page will not result in a new history entry.
   * @param options.snapshotHTML Cached snapshot to render
   * @param options.response Response of the specified location
   */
  function visit(location, options) {
    session.visit(location, options);
  }

  /**
   * Connects a stream source to the main session.
   *
   * @param source Stream source to connect
   */
  function connectStreamSource(source) {
    session.connectStreamSource(source);
  }

  /**
   * Disconnects a stream source from the main session.
   *
   * @param source Stream source to disconnect
   */
  function disconnectStreamSource(source) {
    session.disconnectStreamSource(source);
  }

  /**
   * Renders a stream message to the main session by appending it to the
   * current document.
   *
   * @param message Message to render
   */
  function renderStreamMessage(message) {
    session.renderStreamMessage(message);
  }

  /**
   * Removes all entries from the Turbo Drive page cache.
   * Call this when state has changed on the server that may affect cached pages.
   *
   * @deprecated since version 7.2.0 in favor of `Turbo.cache.clear()`
   */
  function clearCache() {
    console.warn(
      "Please replace `Turbo.clearCache()` with `Turbo.cache.clear()`. The top-level function is deprecated and will be removed in a future version of Turbo.`"
    );
    session.clearCache();
  }

  /**
   * Sets the delay after which the progress bar will appear during navigation.
   *
   * The progress bar appears after 500ms by default.
   *
   * Note that this method has no effect when used with the iOS or Android
   * adapters.
   *
   * @param delay Time to delay in milliseconds
   */
  function setProgressBarDelay(delay) {
    session.setProgressBarDelay(delay);
  }

  function setConfirmMethod(confirmMethod) {
    FormSubmission.confirmMethod = confirmMethod;
  }

  function setFormMode(mode) {
    session.setFormMode(mode);
  }

  var Turbo = /*#__PURE__*/Object.freeze({
    __proto__: null,
    navigator: navigator$1,
    session: session,
    cache: cache,
    PageRenderer: PageRenderer,
    PageSnapshot: PageSnapshot,
    FrameRenderer: FrameRenderer,
    fetch: fetchWithTurboHeaders,
    start: start,
    registerAdapter: registerAdapter,
    visit: visit,
    connectStreamSource: connectStreamSource,
    disconnectStreamSource: disconnectStreamSource,
    renderStreamMessage: renderStreamMessage,
    clearCache: clearCache,
    setProgressBarDelay: setProgressBarDelay,
    setConfirmMethod: setConfirmMethod,
    setFormMode: setFormMode
  });

  class TurboFrameMissingError extends Error {}

  class FrameController {
    fetchResponseLoaded = (_fetchResponse) => Promise.resolve()
    #currentFetchRequest = null
    #resolveVisitPromise = () => {}
    #connected = false
    #hasBeenLoaded = false
    #ignoredAttributes = new Set()
    action = null

    constructor(element) {
      this.element = element;
      this.view = new FrameView(this, this.element);
      this.appearanceObserver = new AppearanceObserver(this, this.element);
      this.formLinkClickObserver = new FormLinkClickObserver(this, this.element);
      this.linkInterceptor = new LinkInterceptor(this, this.element);
      this.restorationIdentifier = uuid();
      this.formSubmitObserver = new FormSubmitObserver(this, this.element);
    }

    // Frame delegate

    connect() {
      if (!this.#connected) {
        this.#connected = true;
        if (this.loadingStyle == FrameLoadingStyle.lazy) {
          this.appearanceObserver.start();
        } else {
          this.#loadSourceURL();
        }
        this.formLinkClickObserver.start();
        this.linkInterceptor.start();
        this.formSubmitObserver.start();
      }
    }

    disconnect() {
      if (this.#connected) {
        this.#connected = false;
        this.appearanceObserver.stop();
        this.formLinkClickObserver.stop();
        this.linkInterceptor.stop();
        this.formSubmitObserver.stop();
      }
    }

    disabledChanged() {
      if (this.loadingStyle == FrameLoadingStyle.eager) {
        this.#loadSourceURL();
      }
    }

    sourceURLChanged() {
      if (this.#isIgnoringChangesTo("src")) return

      if (this.element.isConnected) {
        this.complete = false;
      }

      if (this.loadingStyle == FrameLoadingStyle.eager || this.#hasBeenLoaded) {
        this.#loadSourceURL();
      }
    }

    sourceURLReloaded() {
      const { src } = this.element;
      this.element.removeAttribute("complete");
      this.element.src = null;
      this.element.src = src;
      return this.element.loaded
    }

    loadingStyleChanged() {
      if (this.loadingStyle == FrameLoadingStyle.lazy) {
        this.appearanceObserver.start();
      } else {
        this.appearanceObserver.stop();
        this.#loadSourceURL();
      }
    }

    async #loadSourceURL() {
      if (this.enabled && this.isActive && !this.complete && this.sourceURL) {
        this.element.loaded = this.#visit(expandURL(this.sourceURL));
        this.appearanceObserver.stop();
        await this.element.loaded;
        this.#hasBeenLoaded = true;
      }
    }

    async loadResponse(fetchResponse) {
      if (fetchResponse.redirected || (fetchResponse.succeeded && fetchResponse.isHTML)) {
        this.sourceURL = fetchResponse.response.url;
      }

      try {
        const html = await fetchResponse.responseHTML;
        if (html) {
          const document = parseHTMLDocument(html);
          const pageSnapshot = PageSnapshot.fromDocument(document);

          if (pageSnapshot.isVisitable) {
            await this.#loadFrameResponse(fetchResponse, document);
          } else {
            await this.#handleUnvisitableFrameResponse(fetchResponse);
          }
        }
      } finally {
        this.fetchResponseLoaded = () => Promise.resolve();
      }
    }

    // Appearance observer delegate

    elementAppearedInViewport(element) {
      this.proposeVisitIfNavigatedWithAction(element, getVisitAction(element));
      this.#loadSourceURL();
    }

    // Form link click observer delegate

    willSubmitFormLinkToLocation(link) {
      return this.#shouldInterceptNavigation(link)
    }

    submittedFormLinkToLocation(link, _location, form) {
      const frame = this.#findFrameElement(link);
      if (frame) form.setAttribute("data-turbo-frame", frame.id);
    }

    // Link interceptor delegate

    shouldInterceptLinkClick(element, _location, _event) {
      return this.#shouldInterceptNavigation(element)
    }

    linkClickIntercepted(element, location) {
      this.#navigateFrame(element, location);
    }

    // Form submit observer delegate

    willSubmitForm(element, submitter) {
      return element.closest("turbo-frame") == this.element && this.#shouldInterceptNavigation(element, submitter)
    }

    formSubmitted(element, submitter) {
      if (this.formSubmission) {
        this.formSubmission.stop();
      }

      this.formSubmission = new FormSubmission(this, element, submitter);
      const { fetchRequest } = this.formSubmission;
      this.prepareRequest(fetchRequest);
      this.formSubmission.start();
    }

    // Fetch request delegate

    prepareRequest(request) {
      request.headers["Turbo-Frame"] = this.id;

      if (this.currentNavigationElement?.hasAttribute("data-turbo-stream")) {
        request.acceptResponseType(StreamMessage.contentType);
      }
    }

    requestStarted(_request) {
      markAsBusy(this.element);
    }

    requestPreventedHandlingResponse(_request, _response) {
      this.#resolveVisitPromise();
    }

    async requestSucceededWithResponse(request, response) {
      await this.loadResponse(response);
      this.#resolveVisitPromise();
    }

    async requestFailedWithResponse(request, response) {
      await this.loadResponse(response);
      this.#resolveVisitPromise();
    }

    requestErrored(request, error) {
      console.error(error);
      this.#resolveVisitPromise();
    }

    requestFinished(_request) {
      clearBusyState(this.element);
    }

    // Form submission delegate

    formSubmissionStarted({ formElement }) {
      markAsBusy(formElement, this.#findFrameElement(formElement));
    }

    formSubmissionSucceededWithResponse(formSubmission, response) {
      const frame = this.#findFrameElement(formSubmission.formElement, formSubmission.submitter);

      frame.delegate.proposeVisitIfNavigatedWithAction(frame, getVisitAction(formSubmission.submitter, formSubmission.formElement, frame));
      frame.delegate.loadResponse(response);

      if (!formSubmission.isSafe) {
        session.clearCache();
      }
    }

    formSubmissionFailedWithResponse(formSubmission, fetchResponse) {
      this.element.delegate.loadResponse(fetchResponse);
      session.clearCache();
    }

    formSubmissionErrored(formSubmission, error) {
      console.error(error);
    }

    formSubmissionFinished({ formElement }) {
      clearBusyState(formElement, this.#findFrameElement(formElement));
    }

    // View delegate

    allowsImmediateRender({ element: newFrame }, options) {
      const event = dispatch("turbo:before-frame-render", {
        target: this.element,
        detail: { newFrame, ...options },
        cancelable: true
      });
      const {
        defaultPrevented,
        detail: { render }
      } = event;

      if (this.view.renderer && render) {
        this.view.renderer.renderElement = render;
      }

      return !defaultPrevented
    }

    viewRenderedSnapshot(_snapshot, _isPreview, _renderMethod) {}

    preloadOnLoadLinksForView(element) {
      session.preloadOnLoadLinksForView(element);
    }

    viewInvalidated() {}

    // Frame renderer delegate

    willRenderFrame(currentElement, _newElement) {
      this.previousFrameElement = currentElement.cloneNode(true);
    }

    visitCachedSnapshot = ({ element }) => {
      const frame = element.querySelector("#" + this.element.id);

      if (frame && this.previousFrameElement) {
        frame.replaceChildren(...this.previousFrameElement.children);
      }

      delete this.previousFrameElement;
    }

    // Private

    async #loadFrameResponse(fetchResponse, document) {
      const newFrameElement = await this.extractForeignFrameElement(document.body);

      if (newFrameElement) {
        const snapshot = new Snapshot(newFrameElement);
        const renderer = new FrameRenderer(this, this.view.snapshot, snapshot, FrameRenderer.renderElement, false, false);
        if (this.view.renderPromise) await this.view.renderPromise;
        this.changeHistory();

        await this.view.render(renderer);
        this.complete = true;
        session.frameRendered(fetchResponse, this.element);
        session.frameLoaded(this.element);
        await this.fetchResponseLoaded(fetchResponse);
      } else if (this.#willHandleFrameMissingFromResponse(fetchResponse)) {
        this.#handleFrameMissingFromResponse(fetchResponse);
      }
    }

    async #visit(url) {
      const request = new FetchRequest(this, FetchMethod.get, url, new URLSearchParams(), this.element);

      this.#currentFetchRequest?.cancel();
      this.#currentFetchRequest = request;

      return new Promise((resolve) => {
        this.#resolveVisitPromise = () => {
          this.#resolveVisitPromise = () => {};
          this.#currentFetchRequest = null;
          resolve();
        };
        request.perform();
      })
    }

    #navigateFrame(element, url, submitter) {
      const frame = this.#findFrameElement(element, submitter);

      frame.delegate.proposeVisitIfNavigatedWithAction(frame, getVisitAction(submitter, element, frame));

      this.#withCurrentNavigationElement(element, () => {
        frame.src = url;
      });
    }

    proposeVisitIfNavigatedWithAction(frame, action = null) {
      this.action = action;

      if (this.action) {
        const pageSnapshot = PageSnapshot.fromElement(frame).clone();
        const { visitCachedSnapshot } = frame.delegate;

        frame.delegate.fetchResponseLoaded = async (fetchResponse) => {
          if (frame.src) {
            const { statusCode, redirected } = fetchResponse;
            const responseHTML = await fetchResponse.responseHTML;
            const response = { statusCode, redirected, responseHTML };
            const options = {
              response,
              visitCachedSnapshot,
              willRender: false,
              updateHistory: false,
              restorationIdentifier: this.restorationIdentifier,
              snapshot: pageSnapshot
            };

            if (this.action) options.action = this.action;

            session.visit(frame.src, options);
          }
        };
      }
    }

    changeHistory() {
      if (this.action) {
        const method = getHistoryMethodForAction(this.action);
        session.history.update(method, expandURL(this.element.src || ""), this.restorationIdentifier);
      }
    }

    async #handleUnvisitableFrameResponse(fetchResponse) {
      console.warn(
        `The response (${fetchResponse.statusCode}) from <turbo-frame id="${this.element.id}"> is performing a full page visit due to turbo-visit-control.`
      );

      await this.#visitResponse(fetchResponse.response);
    }

    #willHandleFrameMissingFromResponse(fetchResponse) {
      this.element.setAttribute("complete", "");

      const response = fetchResponse.response;
      const visit = async (url, options) => {
        if (url instanceof Response) {
          this.#visitResponse(url);
        } else {
          session.visit(url, options);
        }
      };

      const event = dispatch("turbo:frame-missing", {
        target: this.element,
        detail: { response, visit },
        cancelable: true
      });

      return !event.defaultPrevented
    }

    #handleFrameMissingFromResponse(fetchResponse) {
      this.view.missing();
      this.#throwFrameMissingError(fetchResponse);
    }

    #throwFrameMissingError(fetchResponse) {
      const message = `The response (${fetchResponse.statusCode}) did not contain the expected <turbo-frame id="${this.element.id}"> and will be ignored. To perform a full page visit instead, set turbo-visit-control to reload.`;
      throw new TurboFrameMissingError(message)
    }

    async #visitResponse(response) {
      const wrapped = new FetchResponse(response);
      const responseHTML = await wrapped.responseHTML;
      const { location, redirected, statusCode } = wrapped;

      return session.visit(location, { response: { redirected, statusCode, responseHTML } })
    }

    #findFrameElement(element, submitter) {
      const id = getAttribute("data-turbo-frame", submitter, element) || this.element.getAttribute("target");
      return getFrameElementById(id) ?? this.element
    }

    async extractForeignFrameElement(container) {
      let element;
      const id = CSS.escape(this.id);

      try {
        element = activateElement(container.querySelector(`turbo-frame#${id}`), this.sourceURL);
        if (element) {
          return element
        }

        element = activateElement(container.querySelector(`turbo-frame[src][recurse~=${id}]`), this.sourceURL);
        if (element) {
          await element.loaded;
          return await this.extractForeignFrameElement(element)
        }
      } catch (error) {
        console.error(error);
        return new FrameElement()
      }

      return null
    }

    #formActionIsVisitable(form, submitter) {
      const action = getAction$1(form, submitter);

      return locationIsVisitable(expandURL(action), this.rootLocation)
    }

    #shouldInterceptNavigation(element, submitter) {
      const id = getAttribute("data-turbo-frame", submitter, element) || this.element.getAttribute("target");

      if (element instanceof HTMLFormElement && !this.#formActionIsVisitable(element, submitter)) {
        return false
      }

      if (!this.enabled || id == "_top") {
        return false
      }

      if (id) {
        const frameElement = getFrameElementById(id);
        if (frameElement) {
          return !frameElement.disabled
        }
      }

      if (!session.elementIsNavigatable(element)) {
        return false
      }

      if (submitter && !session.elementIsNavigatable(submitter)) {
        return false
      }

      return true
    }

    // Computed properties

    get id() {
      return this.element.id
    }

    get enabled() {
      return !this.element.disabled
    }

    get sourceURL() {
      if (this.element.src) {
        return this.element.src
      }
    }

    set sourceURL(sourceURL) {
      this.#ignoringChangesToAttribute("src", () => {
        this.element.src = sourceURL ?? null;
      });
    }

    get loadingStyle() {
      return this.element.loading
    }

    get isLoading() {
      return this.formSubmission !== undefined || this.#resolveVisitPromise() !== undefined
    }

    get complete() {
      return this.element.hasAttribute("complete")
    }

    set complete(value) {
      if (value) {
        this.element.setAttribute("complete", "");
      } else {
        this.element.removeAttribute("complete");
      }
    }

    get isActive() {
      return this.element.isActive && this.#connected
    }

    get rootLocation() {
      const meta = this.element.ownerDocument.querySelector(`meta[name="turbo-root"]`);
      const root = meta?.content ?? "/";
      return expandURL(root)
    }

    #isIgnoringChangesTo(attributeName) {
      return this.#ignoredAttributes.has(attributeName)
    }

    #ignoringChangesToAttribute(attributeName, callback) {
      this.#ignoredAttributes.add(attributeName);
      callback();
      this.#ignoredAttributes.delete(attributeName);
    }

    #withCurrentNavigationElement(element, callback) {
      this.currentNavigationElement = element;
      callback();
      delete this.currentNavigationElement;
    }
  }

  function getFrameElementById(id) {
    if (id != null) {
      const element = document.getElementById(id);
      if (element instanceof FrameElement) {
        return element
      }
    }
  }

  function activateElement(element, currentURL) {
    if (element) {
      const src = element.getAttribute("src");
      if (src != null && currentURL != null && urlsAreEqual(src, currentURL)) {
        throw new Error(`Matching <turbo-frame id="${element.id}"> element has a source URL which references itself`)
      }
      if (element.ownerDocument !== document) {
        element = document.importNode(element, true);
      }

      if (element instanceof FrameElement) {
        element.connectedCallback();
        element.disconnectedCallback();
        return element
      }
    }
  }

  const StreamActions = {
    after() {
      this.targetElements.forEach((e) => e.parentElement?.insertBefore(this.templateContent, e.nextSibling));
    },

    append() {
      this.removeDuplicateTargetChildren();
      this.targetElements.forEach((e) => e.append(this.templateContent));
    },

    before() {
      this.targetElements.forEach((e) => e.parentElement?.insertBefore(this.templateContent, e));
    },

    prepend() {
      this.removeDuplicateTargetChildren();
      this.targetElements.forEach((e) => e.prepend(this.templateContent));
    },

    remove() {
      this.targetElements.forEach((e) => e.remove());
    },

    replace() {
      this.targetElements.forEach((e) => e.replaceWith(this.templateContent));
    },

    update() {
      this.targetElements.forEach((targetElement) => {
        targetElement.innerHTML = "";
        targetElement.append(this.templateContent);
      });
    },

    refresh() {
      session.refresh(this.baseURI, this.requestId);
    }
  };

  // <turbo-stream action=replace target=id><template>...

  /**
   * Renders updates to the page from a stream of messages.
   *
   * Using the `action` attribute, this can be configured one of four ways:
   *
   * - `append` - appends the result to the container
   * - `prepend` - prepends the result to the container
   * - `replace` - replaces the contents of the container
   * - `remove` - removes the container
   * - `before` - inserts the result before the target
   * - `after` - inserts the result after the target
   *
   * @customElement turbo-stream
   * @example
   *   <turbo-stream action="append" target="dom_id">
   *     <template>
   *       Content to append to container designated with the dom_id.
   *     </template>
   *   </turbo-stream>
   */
  class StreamElement extends HTMLElement {
    static async renderElement(newElement) {
      await newElement.performAction();
    }

    async connectedCallback() {
      try {
        await this.render();
      } catch (error) {
        console.error(error);
      } finally {
        this.disconnect();
      }
    }

    async render() {
      return (this.renderPromise ??= (async () => {
        const event = this.beforeRenderEvent;

        if (this.dispatchEvent(event)) {
          await nextRepaint();
          await event.detail.render(this);
        }
      })())
    }

    disconnect() {
      try {
        this.remove();
        // eslint-disable-next-line no-empty
      } catch {}
    }

    /**
     * Removes duplicate children (by ID)
     */
    removeDuplicateTargetChildren() {
      this.duplicateChildren.forEach((c) => c.remove());
    }

    /**
     * Gets the list of duplicate children (i.e. those with the same ID)
     */
    get duplicateChildren() {
      const existingChildren = this.targetElements.flatMap((e) => [...e.children]).filter((c) => !!c.id);
      const newChildrenIds = [...(this.templateContent?.children || [])].filter((c) => !!c.id).map((c) => c.id);

      return existingChildren.filter((c) => newChildrenIds.includes(c.id))
    }

    /**
     * Gets the action function to be performed.
     */
    get performAction() {
      if (this.action) {
        const actionFunction = StreamActions[this.action];
        if (actionFunction) {
          return actionFunction
        }
        this.#raise("unknown action");
      }
      this.#raise("action attribute is missing");
    }

    /**
     * Gets the target elements which the template will be rendered to.
     */
    get targetElements() {
      if (this.target) {
        return this.targetElementsById
      } else if (this.targets) {
        return this.targetElementsByQuery
      } else {
        this.#raise("target or targets attribute is missing");
      }
    }

    /**
     * Gets the contents of the main `<template>`.
     */
    get templateContent() {
      return this.templateElement.content.cloneNode(true)
    }

    /**
     * Gets the main `<template>` used for rendering
     */
    get templateElement() {
      if (this.firstElementChild === null) {
        const template = this.ownerDocument.createElement("template");
        this.appendChild(template);
        return template
      } else if (this.firstElementChild instanceof HTMLTemplateElement) {
        return this.firstElementChild
      }
      this.#raise("first child element must be a <template> element");
    }

    /**
     * Gets the current action.
     */
    get action() {
      return this.getAttribute("action")
    }

    /**
     * Gets the current target (an element ID) to which the result will
     * be rendered.
     */
    get target() {
      return this.getAttribute("target")
    }

    /**
     * Gets the current "targets" selector (a CSS selector)
     */
    get targets() {
      return this.getAttribute("targets")
    }

    /**
     * Reads the request-id attribute
     */
    get requestId() {
      return this.getAttribute("request-id")
    }

    #raise(message) {
      throw new Error(`${this.description}: ${message}`)
    }

    get description() {
      return (this.outerHTML.match(/<[^>]+>/) ?? [])[0] ?? "<turbo-stream>"
    }

    get beforeRenderEvent() {
      return new CustomEvent("turbo:before-stream-render", {
        bubbles: true,
        cancelable: true,
        detail: { newStream: this, render: StreamElement.renderElement }
      })
    }

    get targetElementsById() {
      const element = this.ownerDocument?.getElementById(this.target);

      if (element !== null) {
        return [element]
      } else {
        return []
      }
    }

    get targetElementsByQuery() {
      const elements = this.ownerDocument?.querySelectorAll(this.targets);

      if (elements.length !== 0) {
        return Array.prototype.slice.call(elements)
      } else {
        return []
      }
    }
  }

  class StreamSourceElement extends HTMLElement {
    streamSource = null

    connectedCallback() {
      this.streamSource = this.src.match(/^ws{1,2}:/) ? new WebSocket(this.src) : new EventSource(this.src);

      connectStreamSource(this.streamSource);
    }

    disconnectedCallback() {
      if (this.streamSource) {
        this.streamSource.close();

        disconnectStreamSource(this.streamSource);
      }
    }

    get src() {
      return this.getAttribute("src") || ""
    }
  }

  FrameElement.delegateConstructor = FrameController;

  if (customElements.get("turbo-frame") === undefined) {
    customElements.define("turbo-frame", FrameElement);
  }

  if (customElements.get("turbo-stream") === undefined) {
    customElements.define("turbo-stream", StreamElement);
  }

  if (customElements.get("turbo-stream-source") === undefined) {
    customElements.define("turbo-stream-source", StreamSourceElement);
  }

  (() => {
    let element = document.currentScript;
    if (!element) return
    if (element.hasAttribute("data-turbo-suppress-warning")) return

    element = element.parentElement;
    while (element) {
      if (element == document.body) {
        return console.warn(
          unindent`
        You are loading Turbo from a <script> element inside the <body> element. This is probably not what you meant to do!

        Load your application’s JavaScript bundle inside the <head> element instead. <script> elements in <body> are evaluated with each page change.

        For more information, see: https://turbo.hotwired.dev/handbook/building#working-with-script-elements

        ——
        Suppress this warning by adding a "data-turbo-suppress-warning" attribute to: %s
      `,
          element.outerHTML
        )
      }

      element = element.parentElement;
    }
  })();

  window.Turbo = { ...Turbo, StreamActions };
  start();

  exports.FetchEnctype = FetchEnctype;
  exports.FetchMethod = FetchMethod;
  exports.FetchRequest = FetchRequest;
  exports.FetchResponse = FetchResponse;
  exports.FrameElement = FrameElement;
  exports.FrameLoadingStyle = FrameLoadingStyle;
  exports.FrameRenderer = FrameRenderer;
  exports.PageRenderer = PageRenderer;
  exports.PageSnapshot = PageSnapshot;
  exports.StreamActions = StreamActions;
  exports.StreamElement = StreamElement;
  exports.StreamSourceElement = StreamSourceElement;
  exports.cache = cache;
  exports.clearCache = clearCache;
  exports.connectStreamSource = connectStreamSource;
  exports.disconnectStreamSource = disconnectStreamSource;
  exports.fetch = fetchWithTurboHeaders;
  exports.fetchEnctypeFromString = fetchEnctypeFromString;
  exports.fetchMethodFromString = fetchMethodFromString;
  exports.isSafe = isSafe;
  exports.navigator = navigator$1;
  exports.registerAdapter = registerAdapter;
  exports.renderStreamMessage = renderStreamMessage;
  exports.session = session;
  exports.setConfirmMethod = setConfirmMethod;
  exports.setFormMode = setFormMode;
  exports.setProgressBarDelay = setProgressBarDelay;
  exports.start = start;
  exports.visit = visit;

  Object.defineProperty(exports, '__esModule', { value: true });

}));