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HTMLTemplateElement.ts
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HTMLTemplateElement.ts
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import Node from '../node/Node';
import HTMLElement from '../html-element/HTMLElement';
import IDocumentFragment from '../document-fragment/IDocumentFragment';
import INode from '../node/INode';
import IHTMLTemplateElement from './IHTMLTemplateElement';
import XMLParser from '../../xml-parser/XMLParser';
import XMLSerializer from '../../xml-serializer/XMLSerializer';
import DOMException from '../../exception/DOMException';
/**
* HTML Template Element.
*
* Reference:
* https://developer.mozilla.org/en-US/docs/Web/API/HTMLTemplateElement.
*/
export default class HTMLTemplateElement extends HTMLElement implements IHTMLTemplateElement {
public readonly content: IDocumentFragment = this.ownerDocument.createDocumentFragment();
/**
* @override
*/
public get innerHTML(): string {
return this.getInnerHTML();
}
/**
* @override
*/
public set innerHTML(html: string) {
for (const child of this.content.childNodes.slice()) {
this.content.removeChild(child);
}
for (const node of XMLParser.parse(this.ownerDocument, html).childNodes.slice()) {
this.content.appendChild(node);
}
}
/**
* @override
*/
public get outerHTML(): string {
return new XMLSerializer().serializeToString(this.content);
}
/**
* @override
*/
public set outerHTML(_html: string) {
throw new DOMException(
`Failed to set the 'outerHTML' property on 'Element': This element has no parent node.`
);
}
/**
* @override
*/
public get previousSibling(): INode {
return this.content.previousSibling;
}
/**
* @override
*/
public get nextSibling(): INode {
return this.content.nextSibling;
}
/**
* @override
*/
public get firstChild(): INode {
return this.content.firstChild;
}
/**
* @override
*/
public get lastChild(): INode {
return this.content.lastChild;
}
/**
* @override
*/
public getInnerHTML(options?: { includeShadowRoots?: boolean }): string {
const xmlSerializer = new XMLSerializer();
let xml = '';
for (const node of this.content.childNodes) {
xml += xmlSerializer.serializeToString(node, options);
}
return xml;
}
/**
* @override
*/
public appendChild(node: INode): INode {
return this.content.appendChild(node);
}
/**
* @override
*/
public removeChild(node: Node): INode {
return this.content.removeChild(node);
}
/**
* @override
*/
public insertBefore(newNode: INode, referenceNode: INode): INode {
return this.content.insertBefore(newNode, referenceNode);
}
/**
* @override
*/
public replaceChild(newChild: INode, oldChild: INode): INode {
return this.content.replaceChild(newChild, oldChild);
}
/**
* @override
*/
public cloneNode(deep = false): IHTMLTemplateElement {
const clone = <IHTMLTemplateElement>super.cloneNode(deep);
(<IDocumentFragment>clone.content) = this.content.cloneNode(deep);
return clone;
}
}