webpack-dev-server/client/overlay.js

// The error overlay is inspired (and mostly copied) from Create React App (https://github.com/facebookincubator/create-react-app)
// They, in turn, got inspired by webpack-hot-middleware (https://github.com/glenjamin/webpack-hot-middleware).
import ansiHTML from "ansi-html-community";
import { encode } from "html-entities";
var colors = {
  reset: ["transparent", "transparent"],
  black: "181818",
  red: "E36049",
  green: "B3CB74",
  yellow: "FFD080",
  blue: "7CAFC2",
  magenta: "7FACCA",
  cyan: "C3C2EF",
  lightgrey: "EBE7E3",
  darkgrey: "6D7891"
};
/** @type {HTMLIFrameElement | null | undefined} */

var iframeContainerElement;
/** @type {HTMLDivElement | null | undefined} */

var containerElement;
/** @type {Array<(element: HTMLDivElement) => void>} */

var onLoadQueue = [];
/** @type {TrustedTypePolicy | undefined} */

var overlayTrustedTypesPolicy;
ansiHTML.setColors(colors);
/**
 * @param {string | null} trustedTypesPolicyName
 */

function createContainer(trustedTypesPolicyName) {
  // Enable Trusted Types if they are available in the current browser.
  if (window.trustedTypes) {
    overlayTrustedTypesPolicy = window.trustedTypes.createPolicy(trustedTypesPolicyName || "webpack-dev-server#overlay", {
      createHTML: function createHTML(value) {
        return value;
      }
    });
  }

  iframeContainerElement = document.createElement("iframe");
  iframeContainerElement.id = "webpack-dev-server-client-overlay";
  iframeContainerElement.src = "about:blank";
  iframeContainerElement.style.position = "fixed";
  iframeContainerElement.style.left = 0;
  iframeContainerElement.style.top = 0;
  iframeContainerElement.style.right = 0;
  iframeContainerElement.style.bottom = 0;
  iframeContainerElement.style.width = "100vw";
  iframeContainerElement.style.height = "100vh";
  iframeContainerElement.style.border = "none";
  iframeContainerElement.style.zIndex = 9999999999;

  iframeContainerElement.onload = function () {
    containerElement =
    /** @type {Document} */

    /** @type {HTMLIFrameElement} */
    iframeContainerElement.contentDocument.createElement("div");
    containerElement.id = "webpack-dev-server-client-overlay-div";
    containerElement.style.position = "fixed";
    containerElement.style.boxSizing = "border-box";
    containerElement.style.left = 0;
    containerElement.style.top = 0;
    containerElement.style.right = 0;
    containerElement.style.bottom = 0;
    containerElement.style.width = "100vw";
    containerElement.style.height = "100vh";
    containerElement.style.backgroundColor = "rgba(0, 0, 0, 0.85)";
    containerElement.style.color = "#E8E8E8";
    containerElement.style.fontFamily = "Menlo, Consolas, monospace";
    containerElement.style.fontSize = "large";
    containerElement.style.padding = "2rem";
    containerElement.style.lineHeight = "1.2";
    containerElement.style.whiteSpace = "pre-wrap";
    containerElement.style.overflow = "auto";
    var headerElement = document.createElement("span");
    headerElement.innerText = "Compiled with problems:";
    var closeButtonElement = document.createElement("button");
    closeButtonElement.innerText = "X";
    closeButtonElement.style.background = "transparent";
    closeButtonElement.style.border = "none";
    closeButtonElement.style.fontSize = "20px";
    closeButtonElement.style.fontWeight = "bold";
    closeButtonElement.style.color = "white";
    closeButtonElement.style.cursor = "pointer";
    closeButtonElement.style.cssFloat = "right"; // @ts-ignore

    closeButtonElement.style.styleFloat = "right";
    closeButtonElement.addEventListener("click", function () {
      hide();
    });
    containerElement.appendChild(headerElement);
    containerElement.appendChild(closeButtonElement);
    containerElement.appendChild(document.createElement("br"));
    containerElement.appendChild(document.createElement("br"));
    /** @type {Document} */

    /** @type {HTMLIFrameElement} */
    iframeContainerElement.contentDocument.body.appendChild(containerElement);
    onLoadQueue.forEach(function (onLoad) {
      onLoad(
      /** @type {HTMLDivElement} */
      containerElement);
    });
    onLoadQueue = [];
    /** @type {HTMLIFrameElement} */

    iframeContainerElement.onload = null;
  };

  document.body.appendChild(iframeContainerElement);
}
/**
 * @param {(element: HTMLDivElement) => void} callback
 * @param {string | null} trustedTypesPolicyName
 */


function ensureOverlayExists(callback, trustedTypesPolicyName) {
  if (containerElement) {
    // Everything is ready, call the callback right away.
    callback(containerElement);
    return;
  }

  onLoadQueue.push(callback);

  if (iframeContainerElement) {
    return;
  }

  createContainer(trustedTypesPolicyName);
} // Successful compilation.


function hide() {
  if (!iframeContainerElement) {
    return;
  } // Clean up and reset internal state.


  document.body.removeChild(iframeContainerElement);
  iframeContainerElement = null;
  containerElement = null;
}
/**
 * @param {string} type
 * @param {string  | { file?: string, moduleName?: string, loc?: string, message?: string }} item
 * @returns {{ header: string, body: string }}
 */


function formatProblem(type, item) {
  var header = type === "warning" ? "WARNING" : "ERROR";
  var body = "";

  if (typeof item === "string") {
    body += item;
  } else {
    var file = item.file || ""; // eslint-disable-next-line no-nested-ternary

    var moduleName = item.moduleName ? item.moduleName.indexOf("!") !== -1 ? "".concat(item.moduleName.replace(/^(\s|\S)*!/, ""), " (").concat(item.moduleName, ")") : "".concat(item.moduleName) : "";
    var loc = item.loc;
    header += "".concat(moduleName || file ? " in ".concat(moduleName ? "".concat(moduleName).concat(file ? " (".concat(file, ")") : "") : file).concat(loc ? " ".concat(loc) : "") : "");
    body += item.message || "";
  }

  return {
    header: header,
    body: body
  };
} // Compilation with errors (e.g. syntax error or missing modules).

/**
 * @param {string} type
 * @param {Array<string  | { file?: string, moduleName?: string, loc?: string, message?: string }>} messages
 * @param {string | null} trustedTypesPolicyName
 */


function show(type, messages, trustedTypesPolicyName) {
  ensureOverlayExists(function () {
    messages.forEach(function (message) {
      var entryElement = document.createElement("div");
      var typeElement = document.createElement("span");

      var _formatProblem = formatProblem(type, message),
          header = _formatProblem.header,
          body = _formatProblem.body;

      typeElement.innerText = header;
      typeElement.style.color = "#".concat(colors.red); // Make it look similar to our terminal.

      var text = ansiHTML(encode(body));
      var messageTextNode = document.createElement("div");
      messageTextNode.innerHTML = overlayTrustedTypesPolicy ? overlayTrustedTypesPolicy.createHTML(text) : text;
      entryElement.appendChild(typeElement);
      entryElement.appendChild(document.createElement("br"));
      entryElement.appendChild(document.createElement("br"));
      entryElement.appendChild(messageTextNode);
      entryElement.appendChild(document.createElement("br"));
      entryElement.appendChild(document.createElement("br"));
      /** @type {HTMLDivElement} */

      containerElement.appendChild(entryElement);
    });
  }, trustedTypesPolicyName);
}

export { formatProblem, show, hide };