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* @license\n * Copyright (c) 2016 The Polymer Project Authors. All rights reserved.\n * This code may only be used under the BSD style license found at\n * http://polymer.github.io/LICENSE.txt The complete set of authors may be found\n * at http://polymer.github.io/AUTHORS.txt The complete set of contributors may\n * be found at http://polymer.github.io/CONTRIBUTORS.txt Code distributed by\n * Google as part of the polymer project is also subject to an additional IP\n * rights grant found at http://polymer.github.io/PATENTS.txt\n */\n\nexport const Document_createElement = window.Document.prototype.createElement;\nexport const Document_createElementNS =\n window.Document.prototype.createElementNS;\nexport const Document_importNode = window.Document.prototype.importNode;\n\nexport const Document_prepend = window.Document.prototype['prepend'];\nexport const Document_append = window.Document.prototype['append'];\nexport const DocumentFragment_prepend =\n window.DocumentFragment.prototype['prepend'];\nexport const DocumentFragment_append =\n window.DocumentFragment.prototype['append'];\nexport const Node_cloneNode = window.Node.prototype.cloneNode;\nexport const Node_appendChild = window.Node.prototype.appendChild;\nexport const Node_insertBefore = window.Node.prototype.insertBefore;\nexport const Node_removeChild = window.Node.prototype.removeChild;\nexport const Node_replaceChild = window.Node.prototype.replaceChild;\nexport const Node_textContent =\n Object.getOwnPropertyDescriptor(window.Node.prototype, 'textContent');\nexport const Element_attachShadow = window.Element.prototype['attachShadow'];\nexport const Element_innerHTML =\n Object.getOwnPropertyDescriptor(window.Element.prototype, 'innerHTML');\nexport const Element_getAttribute = window.Element.prototype.getAttribute;\nexport const Element_setAttribute = window.Element.prototype.setAttribute;\nexport const Element_removeAttribute = window.Element.prototype.removeAttribute;\nexport const Element_getAttributeNS = window.Element.prototype.getAttributeNS;\nexport const Element_setAttributeNS = window.Element.prototype.setAttributeNS;\nexport const Element_removeAttributeNS =\n window.Element.prototype.removeAttributeNS;\nexport const Element_insertAdjacentElement =\n window.Element.prototype['insertAdjacentElement'];\nexport const Element_insertAdjacentHTML =\n window.Element.prototype['insertAdjacentHTML'];\nexport const Element_prepend = window.Element.prototype['prepend'];\nexport const Element_append = window.Element.prototype['append'];\nexport const Element_before = window.Element.prototype['before'];\nexport const Element_after = window.Element.prototype['after'];\nexport const Element_replaceWith = window.Element.prototype['replaceWith'];\nexport const Element_remove = window.Element.prototype['remove'];\nexport const HTMLElement = window.HTMLElement;\nexport const HTMLElement_innerHTML =\n Object.getOwnPropertyDescriptor(window.HTMLElement.prototype, 'innerHTML');\nexport const HTMLElement_insertAdjacentElement =\n window.HTMLElement.prototype['insertAdjacentElement'];\nexport const HTMLElement_insertAdjacentHTML =\n window.HTMLElement.prototype['insertAdjacentHTML'];\n","/**\n * @license\n * Copyright (c) 2016 The Polymer Project Authors. All rights reserved.\n * This code may only be used under the BSD style license found at\n * http://polymer.github.io/LICENSE.txt The complete set of authors may be found\n * at http://polymer.github.io/AUTHORS.txt The complete set of contributors may\n * be found at http://polymer.github.io/CONTRIBUTORS.txt Code distributed by\n * Google as part of the polymer project is also subject to an additional IP\n * rights grant found at http://polymer.github.io/PATENTS.txt\n */\n\nimport {HTMLImportElement} from './Externs.js';\n\nconst reservedElementNameSet = new Set<string>();\n// IE11 does not support constructing a set using an iterable.\n['annotation-xml',\n 'color-profile',\n 'font-face',\n 'font-face-src',\n 'font-face-uri',\n 'font-face-format',\n 'font-face-name',\n 'missing-glyph',\n].forEach(item => reservedElementNameSet.add(item));\n\nexport function isValidCustomElementName(localName: string) {\n const reserved = reservedElementNameSet.has(localName);\n const validForm = /^[a-z][.0-9_a-z]*-[-.0-9_a-z]*$/.test(localName);\n return !reserved && validForm;\n}\n\n// Note, IE11 doesn't have `document.contains`.\nconst nativeContains = document.contains ?\n document.contains.bind(document) :\n document.documentElement.contains.bind(document.documentElement);\n\nexport function isConnected(node: Node) {\n // Use `Node#isConnected`, if defined.\n const nativeValue = node.isConnected;\n if (nativeValue !== undefined) {\n return nativeValue;\n }\n // Optimization: It's significantly faster here to try to use `contains`,\n // especially on Edge/IE/\n if (nativeContains(node)) {\n return true;\n }\n\n let current: Node|undefined = node;\n while (current &&\n !(current.__CE_isImportDocument || current instanceof Document)) {\n current = current.parentNode ||\n (window.ShadowRoot && current instanceof ShadowRoot ? current.host :\n undefined);\n }\n return !!(\n current &&\n (current.__CE_isImportDocument || current instanceof Document));\n}\n\nexport function childrenFromFragment(fragment: DocumentFragment): Array<Element> {\n // Note, IE doesn't have `children` on document fragments.\n const nativeChildren = fragment.children;\n if (nativeChildren) {\n return Array.prototype.slice.call(nativeChildren);\n }\n const children: Array<Element> = [];\n for (let n = fragment.firstChild; n; n = n.nextSibling) {\n if (n.nodeType === Node.ELEMENT_NODE) {\n children.push(n as Element);\n }\n }\n return children;\n}\n\nfunction nextSiblingOrAncestorSibling(root: Node, start: Node) {\n let node: Node|null = start;\n while (node && node !== root && !node.nextSibling) {\n node = node.parentNode;\n }\n return (!node || node === root) ? null : node.nextSibling;\n}\n\n\nfunction nextNode(root: Node, start: Node) {\n return start.firstChild ? start.firstChild :\n nextSiblingOrAncestorSibling(root, start);\n}\n\nexport function walkDeepDescendantElements(\n root: Node, callback: (elem: Element) => void, visitedImports?: Set<Node>) {\n let node: Node|null = root;\n while (node) {\n if (node.nodeType === Node.ELEMENT_NODE) {\n const element = node as Element;\n\n callback(element);\n\n const localName = element.localName;\n if (localName === 'link' && element.getAttribute('rel') === 'import') {\n // If this import (polyfilled or not) has its root node available,\n // walk it.\n const importNode = (element as HTMLImportElement).import;\n if (visitedImports === undefined) {\n visitedImports = new Set();\n }\n if (importNode instanceof Node && !visitedImports.has(importNode)) {\n // Prevent multiple walks of the same import root.\n visitedImports.add(importNode);\n\n for (let child = importNode.firstChild; child;\n child = child.nextSibling) {\n walkDeepDescendantElements(child, callback, visitedImports);\n }\n }\n\n // Ignore descendants of import links to prevent attempting to walk the\n // elements created by the HTML Imports polyfill that we just walked\n // above.\n node = nextSiblingOrAncestorSibling(root, element);\n continue;\n } else if (localName === 'template') {\n // Ignore descendants of templates. There shouldn't be any descendants\n // because they will be moved into `.content` during construction in\n // browsers that support template but, in case they exist and are still\n // waiting to be moved by a polyfill, they will be ignored.\n node = nextSiblingOrAncestorSibling(root, element);\n continue;\n }\n\n // Walk shadow roots.\n const shadowRoot = element.__CE_shadowRoot;\n if (shadowRoot) {\n for (let child = shadowRoot.firstChild; child;\n child = child.nextSibling) {\n walkDeepDescendantElements(child, callback, visitedImports);\n }\n }\n }\n\n node = nextNode(root, node);\n }\n}\n","/**\n * @license\n * Copyright (c) 2016 The Polymer Project Authors. All rights reserved.\n * This code may only be used under the BSD style license found at\n * http://polymer.github.io/LICENSE.txt The complete set of authors may be found\n * at http://polymer.github.io/AUTHORS.txt The complete set of contributors may\n * be found at http://polymer.github.io/CONTRIBUTORS.txt Code distributed by\n * Google as part of the polymer project is also subject to an additional IP\n * rights grant found at http://polymer.github.io/PATENTS.txt\n */\n\nimport './Externs.js';\nimport {CustomElementState as CEState} from './CustomElementState.js';\nimport {CustomElementDefinition, HTMLImportElement} from './Externs.js';\nimport * as Native from './Patch/Native.js';\nimport * as Utilities from './Utilities.js';\n\nconst NS_HTML = 'http://www.w3.org/1999/xhtml';\n\nexport default class CustomElementInternals {\n private readonly _patchesNode: Array<(node: Node) => void> = [];\n private readonly _patchesElement: Array<(elem: Element) => void> = [];\n private _hasPatches = false;\n public readonly shadyDomFastWalk: boolean;\n public readonly useDocumentConstructionObserver: boolean;\n\n constructor(options: {\n shadyDomFastWalk: boolean,\n noDocumentConstructionObserver: boolean\n }) {\n this.shadyDomFastWalk = options.shadyDomFastWalk;\n this.useDocumentConstructionObserver =\n !options.noDocumentConstructionObserver;\n }\n\n forEachElement(\n node: Node, callback: (elem: Element) => void,\n visitedImports?: Set<Node>) {\n const sd = window['ShadyDom'];\n if (this.shadyDomFastWalk && sd && sd['inUse']) {\n if (node.nodeType === Node.ELEMENT_NODE) {\n const element = node as Element;\n callback(element);\n }\n // most easily gets to document, element, documentFragment\n if ((node as Element).querySelectorAll!) {\n const elements = sd['nativeMethods'].querySelectorAll.call(node, '*');\n for (let i = 0; i < elements.length; i++) {\n callback(elements[i]);\n }\n }\n } else {\n Utilities.walkDeepDescendantElements(node, callback, visitedImports);\n }\n }\n\n addNodePatch(patch: (node: Node) => void) {\n this._hasPatches = true;\n this._patchesNode.push(patch);\n }\n\n addElementPatch(patch: (element: Element) => void) {\n this._hasPatches = true;\n this._patchesElement.push(patch);\n }\n\n patchTree(node: Node) {\n if (!this._hasPatches) {\n return;\n }\n\n this.forEachElement(node, element => this.patchElement(element));\n }\n\n patchNode(node: Node) {\n if (!this._hasPatches) {\n return;\n }\n\n if (node.__CE_patched) {\n return;\n }\n node.__CE_patched = true;\n\n for (let i = 0; i < this._patchesNode.length; i++) {\n this._patchesNode[i](node);\n }\n }\n\n patchElement(element: Element) {\n if (!this._hasPatches) {\n return;\n }\n\n if (element.__CE_patched) {\n return;\n }\n element.__CE_patched = true;\n\n for (let i = 0; i < this._patchesNode.length; i++) {\n this._patchesNode[i](element);\n }\n\n for (let i = 0; i < this._patchesElement.length; i++) {\n this._patchesElement[i](element);\n }\n }\n\n connectTree(root: Node) {\n const elements: Array<Element> = [];\n\n this.forEachElement(root, element => elements.push(element));\n\n for (let i = 0; i < elements.length; i++) {\n const element = elements[i];\n if (element.__CE_state === CEState.custom) {\n this.connectedCallback(element);\n } else {\n this.upgradeReaction(element as HTMLElement);\n }\n }\n }\n\n disconnectTree(root: Node) {\n const elements: Array<Element> = [];\n\n this.forEachElement(root, element => elements.push(element));\n\n for (let i = 0; i < elements.length; i++) {\n const element = elements[i];\n if (element.__CE_state === CEState.custom) {\n this.disconnectedCallback(element);\n }\n }\n }\n\n /**\n * Upgrades all uncustomized custom elements at and below a root node for\n * which there is a definition. When custom element reaction callbacks are\n * assumed to be called synchronously (which, by the current DOM / HTML spec\n * definitions, they are *not*), callbacks for both elements customized\n * synchronously by the parser and elements being upgraded occur in the same\n * relative order.\n *\n * NOTE: This function, when used to simulate the construction of a tree\n * that is already created but not customized (i.e. by the parser), does\n * *not* prevent the element from reading the 'final' (true) state of the\n * tree. For example, the element, during truly synchronous parsing /\n * construction would see that it contains no children as they have not yet\n * been inserted. However, this function does not modify the tree, the\n * element will (incorrectly) have children. Additionally, self-modification\n * restrictions for custom element constructors imposed by the DOM spec are\n * *not* enforced.\n *\n *\n * The following nested list shows the steps extending down from the HTML\n * spec's parsing section that cause elements to be synchronously created\n * and upgraded:\n *\n * The \"in body\" insertion mode:\n * https://html.spec.whatwg.org/multipage/syntax.html#parsing-main-inbody\n * - Switch on token:\n * .. other cases ..\n * -> Any other start tag\n * - [Insert an HTML element](below) for the token.\n *\n * Insert an HTML element:\n * https://html.spec.whatwg.org/multipage/syntax.html#insert-an-html-element\n * - Insert a foreign element for the token in the HTML namespace:\n * https://html.spec.whatwg.org/multipage/syntax.html#insert-a-foreign-element\n * - Create an element for a token:\n * https://html.spec.whatwg.org/multipage/syntax.html#create-an-element-for-the-token\n * - Will execute script flag is true?\n * - (Element queue pushed to the custom element reactions stack.)\n * - Create an element:\n * https://dom.spec.whatwg.org/#concept-create-element\n * - Sync CE flag is true?\n * - Constructor called.\n * - Self-modification restrictions enforced.\n * - Sync CE flag is false?\n * - (Upgrade reaction enqueued.)\n * - Attributes appended to element.\n * (`attributeChangedCallback` reactions enqueued.)\n * - Will execute script flag is true?\n * - (Element queue popped from the custom element reactions stack.\n * Reactions in the popped stack are invoked.)\n * - (Element queue pushed to the custom element reactions stack.)\n * - Insert the element:\n * https://dom.spec.whatwg.org/#concept-node-insert\n * - Shadow-including descendants are connected. During parsing\n * construction, there are no shadow-*excluding* descendants.\n * However, the constructor may have validly attached a shadow\n * tree to itself and added descendants to that shadow tree.\n * (`connectedCallback` reactions enqueued.)\n * - (Element queue popped from the custom element reactions stack.\n * Reactions in the popped stack are invoked.)\n */\n patchAndUpgradeTree(root: Node, options: {\n visitedImports?: Set<Node>,\n upgrade?: (elem: HTMLElement) => void\n } = {}) {\n const visitedImports = options.visitedImports;\n const upgrade =\n options.upgrade || (element => this.upgradeReaction(element));\n\n const elements: Array<Element> = [];\n\n const gatherElements = (element: Element) => {\n if (this._hasPatches) {\n this.patchElement(element);\n }\n if (element.localName === 'link' &&\n element.getAttribute('rel') === 'import') {\n const importElem = element as HTMLImportElement;\n // The HTML Imports polyfill sets a descendant element of the link to\n // the `import` property, specifically this is *not* a Document.\n const importNode = importElem.import;\n\n if (importNode instanceof Node) {\n importNode.__CE_isImportDocument = true;\n // Connected links are associated with the global registry.\n importNode.__CE_registry = document.__CE_registry;\n }\n\n\n\n if (importNode &&\n (importNode as HTMLImportDocument).readyState === 'complete') {\n importNode.__CE_documentLoadHandled = true;\n } else {\n // If this link's import root is not available, its contents can't\n // be walked. Wait for 'load' and walk it when it's ready.\n element.addEventListener('load', () => {\n const importNode = importElem.import!;\n\n if (importNode.__CE_documentLoadHandled) {\n return;\n }\n importNode.__CE_documentLoadHandled = true;\n\n // Clone the `visitedImports` set that was populated sync during\n // the `patchAndUpgradeTree` call that caused this 'load' handler\n // to be added. Then, remove *this* link's import node so that we\n // can walk that import again, even if it was partially walked\n // later during the same `patchAndUpgradeTree` call.\n const clonedVisitedImports = new Set<Node>();\n if (visitedImports) {\n // IE11 does not support constructing a set using an iterable.\n visitedImports.forEach(item => clonedVisitedImports.add(item));\n clonedVisitedImports.delete(importNode);\n }\n this.patchAndUpgradeTree(\n importNode, {visitedImports: clonedVisitedImports, upgrade});\n });\n }\n } else {\n elements.push(element);\n }\n };\n\n // `forEachElement` populates (and internally checks against)\n // `visitedImports` when traversing a loaded import.\n this.forEachElement(root, gatherElements, visitedImports);\n\n for (let i = 0; i < elements.length; i++) {\n upgrade(elements[i] as HTMLElement);\n }\n }\n\n upgradeReaction(element: HTMLElement) {\n try {\n const definition = this._lookupACustomElementDefinition(\n element.ownerDocument!, element.localName);\n if (definition) {\n this._upgradeAnElement(element, definition);\n }\n } catch (e) {\n this.reportTheException(e);\n }\n }\n\n /**\n * @see https://html.spec.whatwg.org/multipage/custom-elements.html#concept-upgrade-an-element\n */\n private _upgradeAnElement(\n element: HTMLElement, definition: CustomElementDefinition) {\n const currentState = element.__CE_state;\n if (currentState !== undefined) {\n return;\n }\n\n definition.constructionStack.push(element);\n\n try {\n try {\n const result = new (definition.constructorFunction)();\n if (result !== element) {\n throw new Error(\n 'The custom element constructor did not produce the element being upgraded.');\n }\n } finally {\n definition.constructionStack.pop();\n }\n } catch (e) {\n element.__CE_state = CEState.failed;\n throw e;\n }\n\n element.__CE_state = CEState.custom;\n element.__CE_definition = definition;\n\n // Check `hasAttributes` here to avoid iterating when it's not necessary.\n if (definition.attributeChangedCallback && element.hasAttributes()) {\n const observedAttributes = definition.observedAttributes;\n for (let i = 0; i < observedAttributes.length; i++) {\n const name = observedAttributes[i];\n const value = element.getAttribute(name);\n if (value !== null) {\n this.attributeChangedCallback(element, name, null, value, null);\n }\n }\n }\n\n if (Utilities.isConnected(element)) {\n this.connectedCallback(element);\n }\n }\n\n connectedCallback(element: Element) {\n const definition = element.__CE_definition!;\n if (definition.connectedCallback) {\n try {\n definition.connectedCallback.call(element);\n } catch (e) {\n this.reportTheException(e);\n }\n }\n }\n\n disconnectedCallback(element: Element) {\n const definition = element.__CE_definition!;\n if (definition.disconnectedCallback) {\n try {\n definition.disconnectedCallback.call(element);\n } catch (e) {\n this.reportTheException(e);\n }\n }\n }\n\n attributeChangedCallback(\n element: Element, name: string, oldValue?: string|null,\n newValue?: string|null, namespace?: string|null) {\n const definition = element.__CE_definition!;\n if (definition.attributeChangedCallback &&\n definition.observedAttributes.indexOf(name) > -1) {\n try {\n definition.attributeChangedCallback.call(\n element, name, oldValue, newValue, namespace);\n } catch (e) {\n this.reportTheException(e);\n }\n }\n }\n\n /**\n * Runs HTML's 'look up a custom element definition', excluding the namespace\n * check.\n *\n * @see https://html.spec.whatwg.org/multipage/custom-elements.html#look-up-a-custom-element-definition\n */\n private _lookupACustomElementDefinition(doc: Document, localName: string):\n CustomElementDefinition|undefined {\n // The document must be associated with a registry.\n const registry = doc.__CE_registry;\n if (!registry) {\n return;\n }\n\n // Prevent elements created in documents without a browsing context from\n // upgrading.\n //\n // https://html.spec.whatwg.org/multipage/custom-elements.html#look-up-a-custom-element-definition\n // \"If document does not have a browsing context, return null.\"\n //\n // https://html.spec.whatwg.org/multipage/window-object.html#dom-document-defaultview\n // \"The defaultView IDL attribute of the Document interface, on getting,\n // must return this Document's browsing context's WindowProxy object, if\n // this Document has an associated browsing context, or null otherwise.\"\n if (!doc.defaultView && !doc.__CE_isImportDocument) {\n return;\n }\n\n return registry.internal_localNameToDefinition(localName);\n }\n\n /**\n * Runs the DOM's 'create an element'. If namespace is not null, then the\n * native `createElementNS` is used. Otherwise, `createElement` is used.\n *\n * Note, the template polyfill only wraps `createElement`, preventing this\n * function from using `createElementNS` in all cases.\n *\n * @see https://dom.spec.whatwg.org/#concept-create-element\n */\n createAnElement(doc: Document, localName: string, namespace: string|null):\n Element {\n const registry = doc.__CE_registry;\n // Only create custom elements if the document is associated with a\n // registry.\n if (registry && (namespace === null || namespace === NS_HTML)) {\n const definition = registry.internal_localNameToDefinition(localName);\n if (definition) {\n try {\n const result = new (definition.constructorFunction)();\n\n // These conformance checks can't be performed when the user calls\n // the element's constructor themselves. However, this also true in\n // native implementations.\n\n if (result.__CE_state === undefined ||\n result.__CE_definition === undefined) {\n throw new Error(\n 'Failed to construct \\'' + localName + '\\': ' +\n 'The returned value was not constructed with the HTMLElement ' +\n 'constructor.');\n }\n\n if (result.namespaceURI !== NS_HTML) {\n throw new Error(\n 'Failed to construct \\'' + localName + '\\': ' +\n 'The constructed element\\'s namespace must be the HTML ' +\n 'namespace.');\n }\n\n // The following Errors should be DOMExceptions but DOMException\n // isn't constructible in all browsers.\n\n if (result.hasAttributes()) {\n throw new Error(\n 'Failed to construct \\'' + localName + '\\': ' +\n 'The constructed element must not have any attributes.');\n }\n\n // ShadyDOM doesn't wrap `#hasChildNodes`, so we check `#firstChild`\n // instead.\n if (result.firstChild !== null) {\n throw new Error(\n 'Failed to construct \\'' + localName + '\\': ' +\n 'The constructed element must not have any children.');\n }\n\n if (result.parentNode !== null) {\n throw new Error(\n 'Failed to construct \\'' + localName + '\\': ' +\n 'The constructed element must not have a parent node.');\n }\n\n if (result.ownerDocument !== doc) {\n throw new Error(\n 'Failed to construct \\'' + localName + '\\': ' +\n 'The constructed element\\'s owner document is incorrect.');\n }\n\n if (result.localName !== localName) {\n throw new Error(\n 'Failed to construct \\'' + localName + '\\': ' +\n 'The constructed element\\'s local name is incorrect.');\n }\n\n return result;\n } catch (e) {\n this.reportTheException(e);\n\n // When construction fails, a new HTMLUnknownElement is produced.\n // However, there's no direct way to create one, so we create a\n // regular HTMLElement and replace its prototype.\n const result = namespace === null ?\n Native.Document_createElement.call(doc, localName) :\n Native.Document_createElementNS.call(doc, namespace, localName);\n Object.setPrototypeOf(result, HTMLUnknownElement.prototype);\n result.__CE_state = CEState.failed;\n result.__CE_definition = undefined;\n this.patchElement(result);\n return result;\n }\n }\n }\n\n const result = namespace === null ?\n Native.Document_createElement.call(doc, localName) :\n Native.Document_createElementNS.call(doc, namespace, localName);\n this.patchElement(result);\n return result;\n }\n\n /**\n * Runs the DOM's 'report the exception' algorithm.\n *\n * @see https://html.spec.whatwg.org/multipage/webappapis.html#report-the-exception\n */\n reportTheException(error: Error) {\n const message = error.message;\n const filename =\n /* Safari */ error.sourceURL || /* Firefox */ error.fileName || '';\n const lineno =\n /* Safari */ error.line || /* Firefox */ error.lineNumber || 0;\n const colno =\n /* Safari */ error.column || /* Firefox */ error.columnNumber || 0;\n\n let event: ErrorEvent|undefined = undefined;\n if (ErrorEvent.prototype.initErrorEvent === undefined) {\n event = new ErrorEvent(\n 'error', {cancelable: true, message, filename, lineno, colno, error});\n } else {\n event = document.createEvent('ErrorEvent') as ErrorEvent;\n // initErrorEvent(type, bubbles, cancelable, message, filename, line)\n event.initErrorEvent!('error', false, true, message, filename, lineno);\n // Hack for IE, where ErrorEvent#preventDefault does not set\n // #defaultPrevented to true.\n event.preventDefault = function(this: ErrorEvent) {\n Object.defineProperty(this, 'defaultPrevented', {\n configurable: true,\n get: function(this: ErrorEvent) {\n return true;\n },\n });\n };\n }\n\n if (event.error === undefined) {\n Object.defineProperty(event, 'error', {\n configurable: true,\n enumerable: true,\n get: function() {\n return error;\n },\n });\n }\n\n window.dispatchEvent(event);\n if (!event.defaultPrevented) {\n // In 'report the exception', UAs may optionally write errors to the\n // console if their associated ErrorEvent isn't handled during dispatch\n // (indicated by calling `preventDefault`). In practice, these errors are\n // always displayed.\n console.error(error);\n }\n }\n}\n\ndeclare interface HTMLImportDocument extends Node {\n readyState: 'complete'|string;\n}\n","/**\n * @license\n * Copyright (c) 2016 The Polymer Project Authors. All rights reserved.\n * This code may only be used under the BSD style license found at\n * http://polymer.github.io/LICENSE.txt The complete set of authors may be found\n * at http://polymer.github.io/AUTHORS.txt The complete set of contributors may\n * be found at http://polymer.github.io/CONTRIBUTORS.txt Code distributed by\n * Google as part of the polymer project is also subject to an additional IP\n * rights grant found at http://polymer.github.io/PATENTS.txt\n */\n\nimport CustomElementInternals from './CustomElementInternals.js';\nimport CustomElementRegistry from './CustomElementRegistry.js';\nimport PatchDocument from './Patch/Document.js';\nimport PatchDocumentFragment from './Patch/DocumentFragment.js';\nimport PatchElement from './Patch/Element.js';\nimport PatchHTMLElement from './Patch/HTMLElement.js';\nimport PatchNode from './Patch/Node.js';\n\nconst priorCustomElements = window['customElements'];\n\nfunction installPolyfill() {\n const noDocumentConstructionObserver =\n !!(priorCustomElements?.['noDocumentConstructionObserver']);\n const shadyDomFastWalk = !!(priorCustomElements?.['shadyDomFastWalk']);\n\n const internals = new CustomElementInternals(\n {noDocumentConstructionObserver, shadyDomFastWalk});\n\n PatchHTMLElement(internals);\n PatchDocument(internals);\n PatchDocumentFragment(internals);\n PatchNode(internals);\n PatchElement(internals);\n\n const customElements = new CustomElementRegistry(internals);\n\n // The main document is associated with the global registry.\n document.__CE_registry = customElements;\n\n Object.defineProperty(window, 'customElements', {\n configurable: true,\n enumerable: true,\n value: customElements,\n });\n}\n\nif (!priorCustomElements || priorCustomElements['forcePolyfill'] ||\n (typeof priorCustomElements['define'] != 'function') ||\n (typeof priorCustomElements['get'] != 'function')) {\n installPolyfill();\n}\n\n// This is NOT public API and is only meant to work around a GC bug in older\n// versions of Safari that randomly removes the polyfill during tests.\n(window as any)['__CE_installPolyfill'] = installPolyfill;\n","/**\n * @license\n * Copyright (c) 2016 The Polymer Project Authors. All rights reserved.\n * This code may only be used under the BSD style license found at\n * http://polymer.github.io/LICENSE.txt The complete set of authors may be found\n * at http://polymer.github.io/AUTHORS.txt The complete set of contributors may\n * be found at http://polymer.github.io/CONTRIBUTORS.txt Code distributed by\n * Google as part of the polymer project is also subject to an additional IP\n * rights grant found at http://polymer.github.io/PATENTS.txt\n */\n\nexport const CustomElementState = {\n custom: 1,\n failed: 2,\n} as const;\nexport type CustomElementState =\n typeof CustomElementState.custom|typeof CustomElementState.failed;\n\nexport default CustomElementState;\n","/**\n * @license\n * Copyright (c) 2016 The Polymer Project Authors. All rights reserved.\n * This code may only be used under the BSD style license found at\n * http://polymer.github.io/LICENSE.txt The complete set of authors may be found\n * at http://polymer.github.io/AUTHORS.txt The complete set of contributors may\n * be found at http://polymer.github.io/CONTRIBUTORS.txt Code distributed by\n * Google as part of the polymer project is also subject to an additional IP\n * rights grant found at http://polymer.github.io/PATENTS.txt\n */\n\nexport default class Deferred<T> {\n private _value: T|undefined = undefined;\n\n private _resolve!: (val: T) => void;\n\n private readonly _promise: Promise<T>;\n constructor() {\n this._promise = new Promise(resolve => {\n this._resolve = resolve;\n });\n }\n\n resolve(value: T) {\n if (this._value) {\n throw new Error('Already resolved.');\n }\n\n this._value = value;\n this._resolve(value);\n }\n\n toPromise() {\n return this._promise;\n }\n}\n","/**\n * @license\n * Copyright (c) 2016 The Polymer Project Authors. All rights reserved.\n * This code may only be used under the BSD style license found at\n * http://polymer.github.io/LICENSE.txt The complete set of authors may be found\n * at http://polymer.github.io/AUTHORS.txt The complete set of contributors may\n * be found at http://polymer.github.io/CONTRIBUTORS.txt Code distributed by\n * Google as part of the polymer project is also subject to an additional IP\n * rights grant found at http://polymer.github.io/PATENTS.txt\n */\n\nimport CustomElementInternals from './CustomElementInternals.js';\n\nexport default class DocumentConstructionObserver {\n private readonly _internals: CustomElementInternals;\n private readonly _document: Document;\n private _observer: MutationObserver|undefined = undefined;\n constructor(internals: CustomElementInternals, doc: Document) {\n this._internals = internals;\n this._document = doc;\n\n // Simulate tree construction for all currently accessible nodes in the\n // document.\n this._internals.patchAndUpgradeTree(this._document);\n\n if (this._document.readyState === 'loading') {\n this._observer = new MutationObserver(this._handleMutations.bind(this));\n\n // Nodes created by the parser are given to the observer *before* the next\n // task runs. Inline scripts are run in a new task. This means that the\n // observer will be able to handle the newly parsed nodes before the\n // inline script is run.\n this._observer.observe(this._document, {\n childList: true,\n subtree: true,\n });\n }\n }\n\n disconnect() {\n if (this._observer) {\n this._observer.disconnect();\n }\n }\n\n private _handleMutations(mutations: ReadonlyArray<MutationRecord>) {\n // Once the document's `readyState` is 'interactive' or 'complete', all new\n // nodes created within that document will be the result of script and\n // should be handled by patching.\n const readyState = this._document.readyState;\n if (readyState === 'interactive' || readyState === 'complete') {\n this.disconnect();\n }\n\n for (let i = 0; i < mutations.length; i++) {\n const addedNodes = mutations[i].addedNodes;\n for (let j = 0; j < addedNodes.length; j++) {\n const node = addedNodes[j];\n this._internals.patchAndUpgradeTree(node);\n }\n }\n }\n}\n","/**\n * @license\n * Copyright (c) 2016 The Polymer Project Authors. All rights reserved.\n * This code may only be used under the BSD style license found at\n * http://polymer.github.io/LICENSE.txt The complete set of authors may be found\n * at http://polymer.github.io/AUTHORS.txt The complete set of contributors may\n * be found at http://polymer.github.io/CONTRIBUTORS.txt Code distributed by\n * Google as part of the polymer project is also subject to an additional IP\n * rights grant found at http://polymer.github.io/PATENTS.txt\n */\n\nimport {AlreadyConstructedMarkerType} from './AlreadyConstructedMarker.js';\nimport CustomElementInternals from './CustomElementInternals.js';\nimport Deferred from './Deferred.js';\nimport DocumentConstructionObserver from './DocumentConstructionObserver.js';\nimport {Constructor, CustomElementDefinition} from './Externs.js';\nimport * as Utilities from './Utilities.js';\n\ninterface ElementConstructor {\n new(): HTMLElement;\n observedAttributes?: Array<string>;\n}\ntype ConstructorGetter = () => ElementConstructor;\n\n\n/**\n * @unrestricted\n */\nexport default class CustomElementRegistry {\n private readonly _localNameToConstructorGetter =\n new Map<string, ConstructorGetter>();\n private readonly _localNameToDefinition =\n new Map<string, CustomElementDefinition>();\n private readonly _constructorToDefinition =\n new Map<Constructor<HTMLElement>, CustomElementDefinition>();\n private _elementDefinitionIsRunning = false;\n private readonly _internals: CustomElementInternals;\n private readonly _whenDefinedDeferred =\n new Map<string, Deferred<undefined>>();\n\n /**\n * The default flush callback triggers the document walk synchronously.\n */\n private _flushCallback: (fn: () => void) => void = (fn) => fn();\n private _flushPending = false;\n\n /**\n * A map from `localName`s of definitions that were defined *after* the\n * last flush to unupgraded elements matching that definition, in document\n * order. Entries are added to this map when a definition is registered,\n * but the list of elements is only populated during a flush after which\n * all of the entries are removed. DO NOT edit outside of `#_flush`.\n */\n private readonly _unflushedLocalNames: Array<string> = [];\n\n private readonly _documentConstructionObserver: DocumentConstructionObserver|\n undefined;\n\n constructor(internals: CustomElementInternals) {\n this._internals = internals;\n this._documentConstructionObserver =\n internals.useDocumentConstructionObserver ?\n new DocumentConstructionObserver(internals, document) :\n undefined;\n }\n\n polyfillDefineLazy(localName: string, constructorGetter: ConstructorGetter) {\n if (!(constructorGetter instanceof Function)) {\n throw new TypeError(\n 'Custom element constructor getters must be functions.');\n }\n this.internal_assertCanDefineLocalName(localName);\n this._localNameToConstructorGetter.set(localName, constructorGetter);\n this._unflushedLocalNames.push(localName);\n // If we've already called the flush callback and it hasn't called back\n // yet, don't call it again.\n if (!this._flushPending) {\n this._flushPending = true;\n this._flushCallback(() => this._flush());\n }\n }\n\n define(localName: string, constructor: Function) {\n if (!(constructor instanceof Function)) {\n throw new TypeError('Custom element constructors must be functions.');\n }\n\n this.internal_assertCanDefineLocalName(localName);\n\n this.internal_reifyDefinition(localName, constructor as ElementConstructor);\n this._unflushedLocalNames.push(localName);\n // If we've already called the flush callback and it hasn't called back\n // yet, don't call it again.\n if (!this._flushPending) {\n this._flushPending = true;\n this._flushCallback(() => this._flush());\n }\n }\n\n internal_assertCanDefineLocalName(localName: string) {\n if (!Utilities.isValidCustomElementName(localName)) {\n throw new SyntaxError(`The element name '${localName}' is not valid.`);\n }\n\n if (this.internal_localNameToDefinition(localName)) {\n throw new Error(\n `A custom element with name ` +\n `'${localName}' has already been defined.`);\n }\n\n if (this._elementDefinitionIsRunning) {\n throw new Error('A custom element is already being defined.');\n }\n }\n\n internal_reifyDefinition(localName: string, constructor: ElementConstructor) {\n this._elementDefinitionIsRunning = true;\n\n let connectedCallback: CustomElementDefinition['connectedCallback'];\n let disconnectedCallback: CustomElementDefinition['disconnectedCallback'];\n let adoptedCallback: CustomElementDefinition['adoptedCallback'];\n let attributeChangedCallback:\n CustomElementDefinition['attributeChangedCallback'];\n let observedAttributes: CustomElementDefinition['observedAttributes'];\n try {\n const prototype = constructor.prototype;\n if (!(prototype instanceof Object)) {\n throw new TypeError(\n 'The custom element constructor\\'s prototype is not an object.');\n }\n\n type CEReactionCallback = 'connectedCallback'|'disconnectedCallback'|\n 'adoptedCallback'|'attributeChangedCallback';\n const getCallback =\n function getCallback(name: CEReactionCallback) {\n const callbackValue = prototype[name];\n if (callbackValue !== undefined &&\n !(callbackValue instanceof Function)) {\n throw new Error(`The '${name}' callback must be a function.`);\n }\n return callbackValue;\n }\n\n connectedCallback = getCallback('connectedCallback');\n disconnectedCallback = getCallback('disconnectedCallback');\n adoptedCallback = getCallback('adoptedCallback');\n attributeChangedCallback = getCallback('attributeChangedCallback');\n // `observedAttributes` should not be read unless an\n // `attributesChangedCallback` exists\n observedAttributes =\n (attributeChangedCallback && constructor['observedAttributes']) || [];\n } catch (e) {\n throw e;\n } finally {\n this._elementDefinitionIsRunning = false;\n }\n\n const definition = {\n localName,\n constructorFunction: constructor,\n connectedCallback,\n disconnectedCallback,\n adoptedCallback,\n attributeChangedCallback,\n observedAttributes,\n constructionStack: [] as Array<HTMLElement|AlreadyConstructedMarkerType>,\n };\n\n this._localNameToDefinition.set(localName, definition);\n this._constructorToDefinition.set(\n definition.constructorFunction, definition);\n\n return definition;\n }\n\n upgrade(node: Node): void {\n this._internals.patchAndUpgradeTree(node);\n }\n\n private _flush() {\n // If no new definitions were defined, don't attempt to flush. This could\n // happen if a flush callback keeps the function it is given and calls it\n // multiple times.\n if (this._flushPending === false) {\n return;\n }\n this._flushPending = false;\n\n /**\n * Unupgraded elements with definitions that were defined *before* the last\n * flush, in document order.\n */\n const elementsWithStableDefinitions: Array<HTMLElement> = [];\n\n const unflushedLocalNames = this._unflushedLocalNames;\n const elementsWithPendingDefinitions =\n new Map<string, Array<HTMLElement>>();\n for (let i = 0; i < unflushedLocalNames.length; i++) {\n elementsWithPendingDefinitions.set(unflushedLocalNames[i], []);\n }\n\n this._internals.patchAndUpgradeTree(document, {\n upgrade: element => {\n // Ignore the element if it has already upgraded or failed to upgrade.\n if (element.__CE_state !== undefined) {\n return;\n }\n\n const localName = element.localName;\n\n // If there is an applicable pending definition for the element, add the\n // element to the list of elements to be upgraded with that definition.\n const pendingElements = elementsWithPendingDefinitions.get(localName);\n if (pendingElements) {\n pendingElements.push(element);\n // If there is *any other* applicable definition for the element, add\n // it to the list of elements with stable definitions that need to be\n // upgraded.\n } else if (this._localNameToDefinition.has(localName)) {\n elementsWithStableDefinitions.push(element);\n }\n },\n });\n\n // Upgrade elements with 'stable' definitions first.\n for (let i = 0; i < elementsWithStableDefinitions.length; i++) {\n this._internals.upgradeReaction(elementsWithStableDefinitions[i]);\n }\n\n // Upgrade elements with 'pending' definitions in the order they were\n // defined.\n for (let i = 0; i < unflushedLocalNames.length; i++) {\n const localName = unflushedLocalNames[i];\n const pendingUpgradableElements =\n elementsWithPendingDefinitions.get(localName)!;\n\n // Attempt to upgrade all applicable elements.\n for (let i = 0; i < pendingUpgradableElements.length; i++) {\n this._internals.upgradeReaction(pendingUpgradableElements[i]);\n }\n\n // Resolve any promises created by `whenDefined` for the definition.\n const deferred = this._whenDefinedDeferred.get(localName);\n if (deferred) {\n deferred.resolve(undefined);\n }\n }\n\n unflushedLocalNames.length = 0;\n }\n\n get(localName: string): undefined|{new(): HTMLElement} {\n const definition = this.internal_localNameToDefinition(localName);\n if (definition) {\n return definition.constructorFunction;\n }\n\n return undefined;\n }\n\n whenDefined(localName: string): Promise<void> {\n if (!Utilities.isValidCustomElementName(localName)) {\n return Promise.reject(new SyntaxError(\n `'${localName}' is not a valid custom element name.`));\n }\n\n const prior = this._whenDefinedDeferred.get(localName);\n if (prior) {\n return prior.toPromise();\n }\n\n const deferred = new Deferred<undefined>();\n this._whenDefinedDeferred.set(localName, deferred);\n\n // Resolve immediately if the given local name has a regular or lazy\n // definition *and* the full document walk to upgrade elements with that\n // local name has already happened.\n //\n // The behavior of the returned promise differs between the lazy and the\n // non-lazy cases if the definition fails. Normally, the definition would\n // fail synchronously and no pending promises would resolve. However, if\n // the definition is lazy but has not yet been reified, the promise is\n // resolved early here even though it might fail later when reified.\n const anyDefinitionExists = this._localNameToDefinition.has(localName) ||\n this._localNameToConstructorGetter.has(localName);\n const definitionHasFlushed =\n this._unflushedLocalNames.indexOf(localName) === -1;\n if (anyDefinitionExists && definitionHasFlushed) {\n deferred.resolve(undefined);\n }\n\n return deferred.toPromise();\n }\n\n polyfillWrapFlushCallback(outer: (fn: () => void) => void) {\n if (this._documentConstructionObserver) {\n this._documentConstructionObserver.disconnect();\n }\n const inner = this._flushCallback;\n this._flushCallback = flush => outer(() => inner(flush));\n }\n\n internal_localNameToDefinition(localName: string): CustomElementDefinition\n |undefined {\n const existingDefinition = this._localNameToDefinition.get(localName);\n if (existingDefinition) {\n return existingDefinition;\n }\n\n const constructorGetter = this._localNameToConstructorGetter.get(localName);\n if (constructorGetter) {\n this._localNameToConstructorGetter.delete(localName);\n try {\n return this.internal_reifyDefinition(localName, constructorGetter());\n } catch (e) {\n this._internals.reportTheException(e);\n }\n }\n\n return undefined;\n }\n\n internal_constructorToDefinition(constructor: ElementConstructor):\n CustomElementDefinition|undefined {\n return this._constructorToDefinition.get(constructor);\n }\n}\n\n// Closure compiler exports.\nwindow['CustomElementRegistry'] =\n CustomElementRegistry as unknown as typeof window['CustomElementRegistry'];\nCustomElementRegistry.prototype['define'] =\n CustomElementRegistry.prototype.define;\nCustomElementRegistry.prototype['upgrade'] =\n CustomElementRegistry.prototype.upgrade;\nCustomElementRegistry.prototype['get'] = CustomElementRegistry.prototype.get;\nCustomElementRegistry.prototype['whenDefined'] =\n CustomElementRegistry.prototype.whenDefined;\nCustomElementRegistry.prototype['polyfillDefineLazy'] =\n CustomElementRegistry.prototype.polyfillDefineLazy;\nCustomElementRegistry.prototype['polyfillWrapFlushCallback'] =\n CustomElementRegistry.prototype.polyfillWrapFlushCallback;\n","/**\n * @license\n * Copyright (c) 2016 The Polymer Project Authors. All rights reserved.\n * This code may only be used under the BSD style license found at\n * http://polymer.github.io/LICENSE.txt The complete set of authors may be found\n * at http://polymer.github.io/AUTHORS.txt The complete set of contributors may\n * be found at http://polymer.github.io/CONTRIBUTORS.txt Code distributed by\n * Google as part of the polymer project is also subject to an additional IP\n * rights grant found at http://polymer.github.io/PATENTS.txt\n */\n\nimport CustomElementInternals from '../../CustomElementInternals.js';\nimport * as Utilities from '../../Utilities.js';\n\ntype NativeMethod = (this: Node, ...args: Array<Node|string>) => void;\n\ninterface ParentNodeNativeMethods {\n prepend: NativeMethod;\n append: NativeMethod;\n}\n\nexport default function(\n internals: CustomElementInternals,\n destination: ParentNode,\n builtIn: ParentNodeNativeMethods) {\n function appendPrependPatch(builtInMethod: NativeMethod): NativeMethod {\n return function(this: Node, ...nodes) {\n /**\n * A copy of `nodes`, with any DocumentFragment replaced by its children.\n */\n const flattenedNodes: Array<Node|string> = [];\n\n /**\n * Elements in `nodes` that were connected before this call.\n */\n const connectedElements: Array<Node> = [];\n\n for (let i = 0; i < nodes.length; i++) {\n const node = nodes[i];\n\n if (node instanceof Element && Utilities.isConnected(node)) {\n connectedElements.push(node);\n }\n\n if (node instanceof DocumentFragment) {\n for (let child = node.firstChild; child; child = child.nextSibling) {\n flattenedNodes.push(child);\n }\n } else {\n flattenedNodes.push(node);\n }\n }\n\n builtInMethod.apply(this, nodes);\n\n for (let i = 0; i < connectedElements.length; i++) {\n internals.disconnectTree(connectedElements[i]);\n }\n\n if (Utilities.isConnected(this)) {\n for (let i = 0; i < flattenedNodes.length; i++) {\n const node = flattenedNodes[i];\n if (node instanceof Element) {\n internals.connectTree(node);\n }\n }\n }\n };\n }\n\n if (builtIn.prepend !== undefined) {\n destination.prepend = appendPrependPatch(builtIn.prepend);\n }\n\n if (builtIn.append !== undefined) {\n destination.append = appendPrependPatch(builtIn.append);\n }\n}\n","/**\n * @license\n * Copyright (c) 2016 The Polymer Project Authors. All rights reserved.\n * This code may only be used under the BSD style license found at\n * http://polymer.github.io/LICENSE.txt The complete set of authors may be found\n * at http://polymer.github.io/AUTHORS.txt The complete set of contributors may\n * be found at http://polymer.github.io/CONTRIBUTORS.txt Code distributed by\n * Google as part of the polymer project is also subject to an additional IP\n * rights grant found at http://polymer.github.io/PATENTS.txt\n */\n\nimport CustomElementInternals from '../CustomElementInternals.js';\n\nimport PatchParentNode from './Interface/ParentNode.js';\nimport * as Native from './Native.js';\n\nexport default function(internals: CustomElementInternals) {\n Document.prototype.createElement = function(\n this: Document, localName: string) {\n return internals.createAnElement(this, localName, null);\n } as typeof Document.prototype.createElement;\n\n Document.prototype.importNode = function<T extends Node>(\n this: Document, node: T, deep?: boolean): T {\n const clone = Native.Document_importNode.call(this, node, !!deep) as T;\n // Only create custom elements if this document is associated with the\n // registry.\n if (!this.__CE_registry) {\n internals.patchTree(clone);\n } else {\n internals.patchAndUpgradeTree(clone);\n }\n return clone;\n };\n\n Document.prototype.createElementNS =\n function(this: Document, namespace: string|null, localName: string) {\n return internals.createAnElement(this, localName, namespace);\n } as typeof Document.prototype.createElementNS;\n\n PatchParentNode(internals, Document.prototype, {\n prepend: Native.Document_prepend,\n append: Native.Document_append,\n });\n}\n","/**\n * @license\n * Copyright (c) 2016 The Polymer Project Authors. All rights reserved.\n * This code may only be used under the BSD style license found at\n * http://polymer.github.io/LICENSE.txt The complete set of authors may be found\n * at http://polymer.github.io/AUTHORS.txt The complete set of contributors may\n * be found at http://polymer.github.io/CONTRIBUTORS.txt Code distributed by\n * Google as part of the polymer project is also subject to an additional IP\n * rights grant found at http://polymer.github.io/PATENTS.txt\n */\n\nimport CustomElementInternals from '../../CustomElementInternals.js';\nimport * as Utilities from '../../Utilities.js';\n\ntype NativeMethod = (this: ChildNode, ...args: Array<Node|string>) => void;\n\ninterface ChildNodeNativeMethods {\n before: NativeMethod;\n after: NativeMethod;\n replaceWith: NativeMethod;\n remove: (this: ChildNode) => void;\n}\n\nexport default function(\n internals: CustomElementInternals,\n destination: ChildNode,\n builtIn: ChildNodeNativeMethods) {\n function beforeAfterPatch(builtInMethod: NativeMethod): NativeMethod {\n return function(this: ChildNode, ...nodes) {\n const flattenedNodes: Array<string|Node> = [];\n const connectedElements: Array<Node> = [];\n\n for (let i = 0; i < nodes.length; i++) {\n const node = nodes[i];\n\n if (node instanceof Element && Utilities.isConnected(node)) {\n connectedElements.push(node);\n }\n\n if (node instanceof DocumentFragment) {\n for (let child = node.firstChild; child; child = child.nextSibling) {\n flattenedNodes.push(child);\n }\n } else {\n flattenedNodes.push(node);\n }\n }\n\n builtInMethod.apply(this, nodes);\n\n for (let i = 0; i < connectedElements.length; i++) {\n internals.disconnectTree(connectedElements[i]);\n }\n\n if (Utilities.isConnected(this)) {\n for (let i = 0; i < flattenedNodes.length; i++) {\n const node = flattenedNodes[i];\n if (node instanceof Element) {\n internals.connectTree(node);\n }\n }\n }\n };\n }\n\n if (builtIn.before !== undefined) {\n destination.before = beforeAfterPatch(builtIn.before);\n }\n\n if (builtIn.after !== undefined) {\n destination.after = beforeAfterPatch(builtIn.after);\n }\n\n if (builtIn.replaceWith !== undefined) {\n destination.replaceWith = function(\n this: ChildNode, ...nodes: Array<Node|string>) {\n /**\n * A copy of `nodes`, with any DocumentFragment replaced by its children.\n */\n const flattenedNodes: Array<Node|string> = [];\n\n /**\n * Elements in `nodes` that were connected before this call.\n */\n const connectedElements: Array<Node> = [];\n\n for (let i = 0; i < nodes.length; i++) {\n const node = nodes[i];\n\n if (node instanceof Element && Utilities.isConnected(node)) {\n connectedElements.push(node);\n }\n\n if (node instanceof DocumentFragment) {\n for (let child = node.firstChild; child; child = child.nextSibling) {\n flattenedNodes.push(child);\n }\n } else {\n flattenedNodes.push(node);\n }\n }\n\n const wasConnected = Utilities.isConnected(this);\n\n builtIn.replaceWith.apply(this, nodes);\n\n for (let i = 0; i < connectedElements.length; i++) {\n internals.disconnectTree(connectedElements[i]);\n }\n\n if (wasConnected) {\n internals.disconnectTree(this);\n for (let i = 0; i < flattenedNodes.length; i++) {\n const node = flattenedNodes[i];\n if (node instanceof Element) {\n internals.connectTree(node);\n }\n }\n }\n };\n }\n\n if (builtIn.remove !== undefined) {\n destination.remove = function(this: ChildNode) {\n const wasConnected = Utilities.isConnected(this);\n\n builtIn.remove.call(this);\n\n if (wasConnected) {\n internals.disconnectTree(this);\n }\n };\n }\n}\n","/**\n * @license\n * Copyright (c) 2016 The Polymer Project Authors. All rights reserved.\n * This code may only be used under the BSD style license found at\n * http://polymer.github.io/LICENSE.txt The complete set of authors may be found\n * at http://polymer.github.io/AUTHORS.txt The complete set of contributors may\n * be found at http://polymer.github.io/CONTRIBUTORS.txt Code distributed by\n * Google as part of the polymer project is also subject to an additional IP\n * rights grant found at http://polymer.github.io/PATENTS.txt\n */\n\nimport CustomElementInternals from '../CustomElementInternals.js';\nimport CEState from '../CustomElementState.js';\nimport * as Utilities from '../Utilities.js';\n\nimport PatchChildNode from './Interface/ChildNode.js';\nimport PatchParentNode from './Interface/ParentNode.js';\nimport * as Native from './Native.js';\n\nexport default function(internals: CustomElementInternals) {\n if (Native.Element_attachShadow) {\n Element.prototype.attachShadow = function(\n this: Element, init: ShadowRootInit) {\n const shadowRoot = Native.Element_attachShadow.call(this, init);\n internals.patchNode(shadowRoot);\n this.__CE_shadowRoot = shadowRoot;\n return shadowRoot;\n };\n }\n\n\n function patch_innerHTML(\n destination: Element, baseDescriptor: PropertyDescriptor) {\n Object.defineProperty(destination, 'innerHTML', {\n enumerable: baseDescriptor.enumerable,\n configurable: true,\n get: baseDescriptor.get,\n set: function(this: Element, htmlString) {\n const isConnected = Utilities.isConnected(this);\n\n // NOTE: In IE11, when using the native `innerHTML` setter, all nodes\n // that were previously descendants of the context element have all of\n // their children removed as part of the set - the entire subtree is\n // 'disassembled'. This work around walks the subtree *before* using the\n // native setter.\n let removedElements: undefined|Array<Element> = undefined;\n if (isConnected) {\n removedElements = [];\n internals.forEachElement(this, element => {\n if (element !== this) {\n removedElements!.push(element);\n }\n });\n }\n\n baseDescriptor.set!.call(this, htmlString);\n\n if (removedElements) {\n for (let i = 0; i < removedElements.length; i++) {\n const element = removedElements[i];\n if (element.__CE_state === CEState.custom) {\n internals.disconnectedCallback(element);\n }\n }\n }\n\n // Only create custom elements if this element's owner document is\n // associated with the registry.\n if (!this.ownerDocument!.__CE_registry) {\n internals.patchTree(this);\n } else {\n internals.patchAndUpgradeTree(this);\n }\n return htmlString;\n },\n });\n }\n\n if (Native.Element_innerHTML && Native.Element_innerHTML.get) {\n patch_innerHTML(Element.prototype, Native.Element_innerHTML);\n } else if (Native.HTMLElement_innerHTML && Native.HTMLElement_innerHTML.get) {\n patch_innerHTML(HTMLElement.prototype, Native.HTMLElement_innerHTML);\n } else {\n internals.addElementPatch(function(element) {\n patch_innerHTML(element, {\n enumerable: true,\n configurable: true,\n // Implements getting `innerHTML` by performing an unpatched `cloneNode`\n // of the element and returning the resulting element's `innerHTML`.\n // TODO: Is this too expensive?\n get: function(this: Element) {\n return (Native.Node_cloneNode.call(this, true) as Element).innerHTML;\n },\n // Implements setting `innerHTML` by creating an unpatched element,\n // setting `innerHTML` of that element and replacing the target\n // element's children with those of the unpatched element.\n set: function(this: Element, assignedValue) {\n // NOTE: re-route to `content` for `template` elements.\n // We need to do this because `template.appendChild` does not\n // route into `template.content`.\n const isTemplate = (this.localName === 'template');\n const content =\n isTemplate ? ((this) as HTMLTemplateElement).content : this;\n const rawElement = Native.Document_createElementNS.call(\n document, this.namespaceURI, this.localName);\n rawElement.innerHTML = assignedValue;\n\n while (content.childNodes.length > 0) {\n Native.Node_removeChild.call(content, content.childNodes[0]);\n }\n const container = isTemplate ?\n (rawElement as HTMLTemplateElement).content :\n rawElement;\n while (container.childNodes.length > 0) {\n Native.Node_appendChild.call(content, container.childNodes[0]);\n }\n },\n });\n });\n }\n\n\n Element.prototype.setAttribute = function(this: Element, name, newValue) {\n // Fast path for non-custom elements.\n if (this.__CE_state !== CEState.custom) {\n return Native.Element_setAttribute.call(this, name, newValue);\n }\n\n const oldValue = Native.Element_getAttribute.call(this, name);\n Native.Element_setAttribute.call(this, name, newValue);\n newValue = Native.Element_getAttribute.call(this, name)!;\n internals.attributeChangedCallback(this, name, oldValue, newValue, null);\n };\n\n Element.prototype.setAttributeNS = function(\n this: Element, namespace, name, newValue) {\n // Fast path for non-custom elements.\n if (this.__CE_state !== CEState.custom) {\n return Native.Element_setAttributeNS.call(\n this, namespace, name, newValue);\n }\n\n const oldValue = Native.Element_getAttributeNS.call(this, namespace, name);\n Native.Element_setAttributeNS.call(this, namespace, name, newValue);\n newValue = Native.Element_getAttributeNS.call(this, namespace, name)!;\n internals.attributeChangedCallback(\n this, name, oldValue, newValue, namespace);\n };\n\n Element.prototype.removeAttribute = function(this: Element, name) {\n // Fast path for non-custom elements.\n if (this.__CE_state !== CEState.custom) {\n return Native.Element_removeAttribute.call(this, name);\n }\n\n const oldValue = Native.Element_getAttribute.call(this, name);\n Native.Element_removeAttribute.call(this, name);\n if (oldValue !== null) {\n internals.attributeChangedCallback(this, name, oldValue, null, null);\n }\n };\n\n Element.prototype.removeAttributeNS = function(\n this: Element, namespace, name) {\n // Fast path for non-custom elements.\n if (this.__CE_state !== CEState.custom) {\n return Native.Element_removeAttributeNS.call(this, namespace, name);\n }\n\n const oldValue = Native.Element_getAttributeNS.call(this, namespace, name);\n Native.Element_removeAttributeNS.call(this, namespace, name);\n // In older browsers, `Element#getAttributeNS` may return the empty string\n // instead of null if the attribute does not exist. For details, see;\n // https://developer.mozilla.org/en-US/docs/Web/API/Element/getAttributeNS#Notes\n const newValue = Native.Element_getAttributeNS.call(this, namespace, name);\n if (oldValue !== newValue) {\n internals.attributeChangedCallback(\n this, name, oldValue, newValue, namespace);\n }\n };\n\n\n function patch_insertAdjacentElement(\n destination: Element, baseMethod: Element['insertAdjacentElement']) {\n destination.insertAdjacentElement = function(\n this: Element, position, element) {\n const wasConnected = Utilities.isConnected(element);\n const insertedElement = baseMethod.call(this, position, element)!;\n\n if (wasConnected) {\n internals.disconnectTree(element);\n }\n\n if (Utilities.isConnected(insertedElement)) {\n internals.connectTree(element);\n }\n return insertedElement;\n };\n }\n\n if (Native.HTMLElement_insertAdjacentElement) {\n patch_insertAdjacentElement(\n HTMLElement.prototype, Native.HTMLElement_insertAdjacentElement);\n } else if (Native.Element_insertAdjacentElement) {\n patch_insertAdjacentElement(\n Element.prototype, Native.Element_insertAdjacentElement);\n }\n\n\n function patch_insertAdjacentHTML(\n destination: Element, baseMethod: Element['insertAdjacentHTML']) {\n /**\n * Patches and upgrades all nodes which are siblings between `start`\n * (inclusive) and `end` (exclusive). If `end` is `null`, then all siblings\n * following `start` will be patched and upgraded.\n */\n function upgradeNodesInRange(start: Node, end: Node|null) {\n const nodes = [];\n for (let node: Node = start; node !== end; node = node.nextSibling!) {\n nodes.push(node);\n }\n for (let i = 0; i < nodes.length; i++) {\n internals.patchAndUpgradeTree(nodes[i]);\n }\n }\n\n destination.insertAdjacentHTML = function(this: Element, position, text) {\n const strPosition = position.toLowerCase();\n\n if (strPosition === 'beforebegin') {\n const marker = this.previousSibling;\n baseMethod.call(this, strPosition, text);\n upgradeNodesInRange(marker || this.parentNode!.firstChild!, this);\n } else if (strPosition === 'afterbegin') {\n const marker = this.firstChild;\n baseMethod.call(this, strPosition, text);\n upgradeNodesInRange(this.firstChild!, marker);\n } else if (strPosition === 'beforeend') {\n const marker = this.lastChild;\n baseMethod.call(this, strPosition, text);\n upgradeNodesInRange(marker || this.firstChild!, null);\n } else if (strPosition === 'afterend') {\n const marker = this.nextSibling;\n baseMethod.call(this, strPosition, text);\n upgradeNodesInRange(this.nextSibling!, marker);\n } else {\n throw new SyntaxError(\n `The value provided (${String(strPosition)}) is ` +\n 'not one of \\'beforebegin\\', \\'afterbegin\\', \\'beforeend\\', or \\'afterend\\'.');\n }\n };\n }\n\n if (Native.HTMLElement_insertAdjacentHTML) {\n patch_insertAdjacentHTML(\n HTMLElement.prototype, Native.HTMLElement_insertAdjacentHTML);\n } else if (Native.Element_insertAdjacentHTML) {\n patch_insertAdjacentHTML(\n Element.prototype, Native.Element_insertAdjacentHTML);\n }\n\n\n PatchParentNode(internals, Element.prototype, {\n prepend: Native.Element_prepend,\n append: Native.Element_append,\n });\n\n PatchChildNode(internals, Element.prototype, {\n before: Native.Element_before,\n after: Native.Element_after,\n replaceWith: Native.Element_replaceWith,\n remove: Native.Element_remove,\n });\n}\n","/**\n * @license\n * Copyright (c) 2016 The Polymer Project Authors. All rights reserved.\n * This code may only be used under the BSD style license found at\n * http://polymer.github.io/LICENSE.txt The complete set of authors may be found\n * at http://polymer.github.io/AUTHORS.txt The complete set of contributors may\n * be found at http://polymer.github.io/CONTRIBUTORS.txt Code distributed by\n * Google as part of the polymer project is also subject to an additional IP\n * rights grant found at http://polymer.github.io/PATENTS.txt\n */\n\n/**\n * Represents the 'already constructed marker' used in custom\n * element construction stacks.\n *\n * https://html.spec.whatwg.org/#concept-already-constructed-marker\n */\nconst alreadyConstructedMarker = {} as {_alreadyConstructedMarker: never};\n\nexport default alreadyConstructedMarker;\nexport type AlreadyConstructedMarkerType = typeof alreadyConstructedMarker;\n","/**\n * @license\n * Copyright (c) 2016 The Polymer Project Authors. All rights reserved.\n * This code may only be used under the BSD style license found at\n * http://polymer.github.io/LICENSE.txt The complete set of authors may be found\n * at http://polymer.github.io/AUTHORS.txt The complete set of contributors may\n * be found at http://polymer.github.io/CONTRIBUTORS.txt Code distributed by\n * Google as part of the polymer project is also subject to an additional IP\n * rights grant found at http://polymer.github.io/PATENTS.txt\n */\n\nimport AlreadyConstructedMarker from '../AlreadyConstructedMarker.js';\nimport CustomElementInternals from '../CustomElementInternals.js';\nimport CEState from '../CustomElementState.js';\nimport {Constructor} from '../Externs.js';\nimport * as Native from './Native.js';\n\nexport default function(internals: CustomElementInternals) {\n const PatchedHTMLElement = function HTMLElement(this: HTMLElement) {\n // This should really be `new.target` but `new.target` can't be\n // emulated in ES5. Assuming the user keeps the default value of the\n // constructor's prototype's `constructor` property, this is\n // equivalent.\n const constructor = this.constructor as Constructor<HTMLElement>;\n\n // Always look up the definition from the global registry.\n const registry = document.__CE_registry!;\n const definition = registry.internal_constructorToDefinition(constructor);\n if (!definition) {\n throw new Error(\n 'Failed to construct a custom element: ' +\n 'The constructor was not registered with `customElements`.');\n }\n\n const constructionStack = definition.constructionStack;\n\n if (constructionStack.length === 0) {\n const element = (Native.Document_createElement.call(\n document, definition.localName)) as HTMLElement;\n Object.setPrototypeOf(element, constructor.prototype as typeof element);\n element.__CE_state = CEState.custom;\n element.__CE_definition = definition;\n internals.patchElement(element);\n return element;\n }\n\n const lastIndex = constructionStack.length - 1;\n const element = constructionStack[lastIndex];\n if (element === AlreadyConstructedMarker) {\n const localName = definition.localName;\n throw new Error(\n 'Failed to construct \\'' + localName + '\\': ' +\n 'This element was already constructed.');\n }\n const toConstructElement = element as HTMLElement;\n constructionStack[lastIndex] = AlreadyConstructedMarker;\n\n Object.setPrototypeOf(\n toConstructElement, constructor.prototype as typeof toConstructElement);\n internals.patchElement(toConstructElement);\n\n return toConstructElement;\n };\n\n PatchedHTMLElement.prototype = Native.HTMLElement.prototype;\n // Safari 9 has `writable: false` on the propertyDescriptor\n // Make it writable so that TypeScript can patch up the\n // constructor in the ES5 compiled code.\n Object.defineProperty(HTMLElement.prototype, 'constructor', {\n writable: true,\n configurable: true,\n enumerable: false,\n value: PatchedHTMLElement\n });\n\n window['HTMLElement'] = PatchedHTMLElement as unknown as typeof HTMLElement;\n}\n","/**\n * @license\n * Copyright (c) 2016 The Polymer Project Authors. All rights reserved.\n * This code may only be used under the BSD style license found at\n * http://polymer.github.io/LICENSE.txt The complete set of authors may be found\n * at http://polymer.github.io/AUTHORS.txt The complete set of contributors may\n * be found at http://polymer.github.io/CONTRIBUTORS.txt Code distributed by\n * Google as part of the polymer project is also subject to an additional IP\n * rights grant found at http://polymer.github.io/PATENTS.txt\n */\n\nimport CustomElementInternals from '../CustomElementInternals.js';\nimport * as Utilities from '../Utilities.js';\n\nimport * as Native from './Native.js';\n\nexport default function(internals: CustomElementInternals) {\n // `Node#nodeValue` is implemented on `Attr`.\n // `Node#textContent` is implemented on `Attr`, `Element`.\n\n Node.prototype.insertBefore = function<T extends Node>(\n this: Node, node: T, refNode: Node|null) {\n if (node instanceof DocumentFragment) {\n const insertedNodes = Utilities.childrenFromFragment(node);\n const nativeResult = Native.Node_insertBefore.call(this, node, refNode);\n\n // DocumentFragments can't be connected, so `disconnectTree` will never\n // need to be called on a DocumentFragment's children after inserting it.\n\n if (Utilities.isConnected(this)) {\n for (let i = 0; i < insertedNodes.length; i++) {\n internals.connectTree(insertedNodes[i]);\n }\n }\n\n return nativeResult as T;\n }\n\n const nodeWasConnectedElement =\n node instanceof Element && Utilities.isConnected(node);\n const nativeResult =\n Native.Node_insertBefore.call(this, node, refNode) as T;\n\n if (nodeWasConnectedElement) {\n internals.disconnectTree(node);\n }\n\n if (Utilities.isConnected(this)) {\n internals.connectTree(node);\n }\n\n return nativeResult;\n };\n\n Node.prototype.appendChild = function<T extends Node>(this: Node, node: T) {\n if (node instanceof DocumentFragment) {\n const insertedNodes = Utilities.childrenFromFragment(node);\n const nativeResult = Native.Node_appendChild.call(this, node) as T;\n\n // DocumentFragments can't be connected, so `disconnectTree` will never\n // need to be called on a DocumentFragment's children after inserting it.\n\n if (Utilities.isConnected(this)) {\n for (let i = 0; i < insertedNodes.length; i++) {\n internals.connectTree(insertedNodes[i]);\n }\n }\n\n return nativeResult;\n }\n\n const nodeWasConnectedElement =\n node instanceof Element && Utilities.isConnected(node);\n const nativeResult = Native.Node_appendChild.call(this, node) as T;\n\n if (nodeWasConnectedElement) {\n internals.disconnectTree(node);\n }\n\n if (Utilities.isConnected(this)) {\n internals.connectTree(node);\n }\n\n return nativeResult;\n };\n\n Node.prototype.cloneNode = function(this: Node, deep) {\n const clone = Native.Node_cloneNode.call(this, !!deep);\n // Only create custom elements if this element's owner document is\n // associated with the registry.\n if (!this.ownerDocument!.__CE_registry) {\n internals.patchTree(clone);\n } else {\n internals.patchAndUpgradeTree(clone);\n }\n return clone;\n };\n\n Node.prototype.removeChild = function<T extends Node>(this: Node, node: T) {\n const nodeWasConnectedElement =\n node instanceof Element && Utilities.isConnected(node);\n const nativeResult = Native.Node_removeChild.call(this, node) as T;\n\n if (nodeWasConnectedElement) {\n internals.disconnectTree(node);\n }\n\n return nativeResult;\n };\n\n Node.prototype.replaceChild = function<T extends Node>(\n this: Node, nodeToInsert: Node, nodeToRemove: T) {\n if (nodeToInsert instanceof DocumentFragment) {\n const insertedNodes = Utilities.childrenFromFragment(nodeToInsert);\n const nativeResult =\n Native.Node_replaceChild.call(this, nodeToInsert, nodeToRemove) as T;\n\n // DocumentFragments can't be connected, so `disconnectTree` will never\n // need to be called on a DocumentFragment's children after inserting it.\n\n if (Utilities.isConnected(this)) {\n internals.disconnectTree(nodeToRemove);\n for (let i = 0; i < insertedNodes.length; i++) {\n internals.connectTree(insertedNodes[i]);\n }\n }\n\n return nativeResult;\n }\n\n const nodeToInsertWasConnectedElement =\n nodeToInsert instanceof Element && Utilities.isConnected(nodeToInsert);\n const nativeResult =\n Native.Node_replaceChild.call(this, nodeToInsert, nodeToRemove) as T;\n const thisIsConnected = Utilities.isConnected(this);\n\n if (thisIsConnected) {\n internals.disconnectTree(nodeToRemove);\n }\n\n if (nodeToInsertWasConnectedElement) {\n internals.disconnectTree(nodeToInsert);\n }\n\n if (thisIsConnected) {\n internals.connectTree(nodeToInsert);\n }\n\n return nativeResult;\n };\n\n\n function patch_textContent(\n destination: Node, baseDescriptor: PropertyDescriptor) {\n Object.defineProperty(destination, 'textContent', {\n enumerable: baseDescriptor.enumerable,\n configurable: true,\n get: baseDescriptor.get,\n set: function(this: Node, assignedValue) {\n // If this is a text node then there are no nodes to disconnect.\n if (this.nodeType === Node.TEXT_NODE) {\n baseDescriptor.set!.call(this, assignedValue);\n return;\n }\n\n let removedNodes = undefined;\n // Checking for `firstChild` is faster than reading `childNodes.length`\n // to compare with 0.\n if (this.firstChild) {\n // Using `childNodes` is faster than `children`, even though we only\n // care about elements.\n const childNodes = this.childNodes;\n const childNodesLength = childNodes.length;\n if (childNodesLength > 0 && Utilities.isConnected(this)) {\n // Copying an array by iterating is faster than using slice.\n removedNodes = new Array(childNodesLength);\n for (let i = 0; i < childNodesLength; i++) {\n removedNodes[i] = childNodes[i];\n }\n }\n }\n\n baseDescriptor.set!.call(this, assignedValue);\n\n if (removedNodes) {\n for (let i = 0; i < removedNodes.length; i++) {\n internals.disconnectTree(removedNodes[i]);\n }\n }\n },\n });\n }\n\n if (Native.Node_textContent && Native.Node_textContent.get) {\n patch_textContent(Node.prototype, Native.Node_textContent);\n } else {\n internals.addNodePatch(function(element) {\n patch_textContent(element, {\n enumerable: true,\n configurable: true,\n // NOTE: This implementation of the `textContent` getter assumes that\n // text nodes' `textContent` getter will not be patched.\n get: function(this: Node) {\n const parts: Array<string|null> = [];\n\n for (let n = this.firstChild; n; n = n.nextSibling) {\n if (n.nodeType === Node.COMMENT_NODE) {\n continue;\n }\n parts.push(n.textContent);\n }\n\n return parts.join('');\n },\n set: function(this: Node, assignedValue) {\n while (this.firstChild) {\n Native.Node_removeChild.call(this, this.firstChild);\n }\n // `textContent = null | undefined | ''` does not result in\n // a TextNode childNode\n if (assignedValue != null && assignedValue !== '') {\n Native.Node_appendChild.call(\n this, document.createTextNode(assignedValue));\n }\n },\n });\n });\n }\n}\n","/**\n * @license\n * Copyright (c) 2016 The Polymer Project Authors. All rights reserved.\n * This code may only be used under the BSD style license found at\n * http://polymer.github.io/LICENSE.txt The complete set of authors may be found\n * at http://polymer.github.io/AUTHORS.txt The complete set of contributors may\n * be found at http://polymer.github.io/CONTRIBUTORS.txt Code distributed by\n * Google as part of the polymer project is also subject to an additional IP\n * rights grant found at http://polymer.github.io/PATENTS.txt\n */\n\nimport CustomElementInternals from '../CustomElementInternals.js';\n\nimport PatchParentNode from './Interface/ParentNode.js';\nimport * as Native from './Native.js';\n\nexport default function(internals: CustomElementInternals) {\n PatchParentNode(internals, DocumentFragment.prototype, {\n prepend: Native.DocumentFragment_prepend,\n append: Native.DocumentFragment_append,\n });\n}\n"]} |