happy-dom/lib/nodes/html-document/HTMLDocument.js

Happy DOM is a JavaScript implementation of a web browser without its graphical user interface. It includes many web standards from WHATWG DOM and HTML.

import Document from '../document/Document.js';
import * as PropertySymbol from '../../PropertySymbol.js';
import NodeTypeEnum from '../node/NodeTypeEnum.js';
/**
 * Document.
 */
export default class HTMLDocument extends Document {
    /**
     * Constructor.
     */
    constructor() {
        super();
        // Default document elements
        const documentElement = this.createElement('html');
        const bodyElement = this.createElement('body');
        const headElement = this.createElement('head');
        this.appendChild(documentElement);
        documentElement.appendChild(headElement);
        documentElement.appendChild(bodyElement);
    }
    /**
     * @override
     */
    [PropertySymbol.appendChild](node, disableValidations = false) {
        if (node[PropertySymbol.nodeType] === NodeTypeEnum.textNode) {
            throw new this[PropertySymbol.window].Error(`Failed to execute 'appendChild' on 'Node': Nodes of type '#text' may not be inserted inside nodes of type '#document'.`);
        }
        if (node[PropertySymbol.nodeType] === NodeTypeEnum.documentFragmentNode) {
            return;
        }
        if (node[PropertySymbol.nodeType] === NodeTypeEnum.elementNode &&
            this[PropertySymbol.elementArray].length !== 0) {
            throw new this[PropertySymbol.window].Error(`Failed to execute 'appendChild' on 'Node': Only one element on document allowed.`);
        }
        return super[PropertySymbol.appendChild](node, disableValidations);
    }
    /**
     * @override
     */
    [PropertySymbol.insertBefore](newNode, referenceNode, disableValidations = false) {
        if (newNode[PropertySymbol.nodeType] === NodeTypeEnum.textNode) {
            throw new this[PropertySymbol.window].Error(`Failed to execute 'insertBefore' on 'Node': Nodes of type '#text' may not be inserted inside nodes of type '#document'.`);
        }
        if (newNode[PropertySymbol.nodeType] === NodeTypeEnum.documentFragmentNode) {
            return;
        }
        if (newNode[PropertySymbol.nodeType] === NodeTypeEnum.elementNode &&
            this[PropertySymbol.elementArray].length !== 0) {
            throw new this[PropertySymbol.window].Error(`Failed to execute 'insertBefore' on 'Node': Only one element on document allowed.`);
        }
        return super[PropertySymbol.insertBefore](newNode, referenceNode, disableValidations);
    }
}
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