LinkedDOM Showcase

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{ parseHTML } from 'https://esm.sh/linkedom@0.16.0';\n\nexport default async function server(request: Request): Promise {\n // Parse the URL from the request query parameters\n const url = new URL(request.url).searchParams.get('url');\n \n let html: string;\n if (url) {\n // Fetch the webpage\n const response = await fetch(url, {\n headers: {\n 'User-Agent': 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/91.0.4472.124 Safari/537.36'\n }\n });\n html = await response.text();\n } else {\n // Default HTML for demonstration\n html = `\n \n \n \n LinkedDOM Showcase\n \n \n \n \n \n `;\n }\n\n // Use parseHTML to create document and related objects\n const { \n window, \n document, \n customElements, \n HTMLElement \n } = parseHTML(html);\n\n // Define a custom element\n customElements.define('user-badge', class extends HTMLElement {\n connectedCallback() {\n this.innerHTML = `\n 👤 User\n `;\n }\n });\n\n // Append custom element\n document.body.appendChild(\n document.createElement('user-badge')\n );\n\n // Generate ARIA tree from the document\n const ariaSnapshot = generateAriaTree(document.documentElement);\n const ariaYaml = renderAriaTree(ariaSnapshot.root);\n\n // Demonstrate LinkedDOM capabilities\n const formElements = document.querySelectorAll('form, input[name], button');\n const serializedDocument = document.toString();\n\n return new Response(JSON.stringify({\n ariaYaml,\n formElementCount: formElements.length,\n documentTitle: document.title,\n serializedDocument,\n customElementAdded: document.body.innerHTML.includes('user-badge')\n }), {\n headers: {\n 'Content-Type': 'application/json',\n 'Access-Control-Allow-Origin': '*'\n }\n });\n}\n\n// Utility functions (same as previous implementation)\nconst roleUtils = {\n beginAriaCaches: () => {},\n endAriaCaches: () => {},\n \n getAriaRole: (element: Element): string => {\n // Detect ARIA role with basic heuristics\n if (element.getAttribute('role')) \n return element.getAttribute('role')!;\n \n const roleMap: {[key: string]: string} = {\n 'BUTTON': 'button',\n 'A': 'link',\n 'INPUT': 'textbox',\n 'TEXTAREA': 'textbox',\n 'SELECT': 'listbox',\n 'H1': 'heading',\n 'H2': 'heading',\n 'H3': 'heading',\n 'H4': 'heading',\n 'H5': 'heading',\n 'H6': 'heading'\n };\n \n return roleMap[element.tagName] || 'generic';\n },\n \n getElementAccessibleName: (element: Element): string => {\n // More comprehensive accessible name detection\n const ariaLabel = element.getAttribute('aria-label');\n const title = element.getAttribute('title');\n const textContent = element.textContent ? element.textContent.trim() : '';\n \n return ariaLabel || title || textContent || '';\n },\n \n isElementHiddenForAria: (element: Element): boolean => {\n // More robust hidden element detection\n return (element.getAttribute('aria-hidden') === 'true') \n || (element.getAttribute('style')?.includes('display:none'))\n || (element.classList && element.classList.contains('hidden'))\n || false;\n },\n \n getPseudoContent: () => '',\n \n kAriaCheckedRoles: ['checkbox', 'radio', 'switch'],\n kAriaDisabledRoles: ['button', 'input', 'select'],\n kAriaExpandedRoles: ['button', 'combobox', 'menu'],\n kAriaLevelRoles: ['heading', 'listitem'],\n kAriaPressedRoles: ['button'],\n kAriaSelectedRoles: ['option', 'tab'],\n \n getAriaChecked: (element: Element) => {\n const checkedAttr = element.getAttribute('aria-checked');\n if (checkedAttr === 'mixed') return 'mixed';\n return checkedAttr === 'true';\n },\n \n getAriaDisabled: (element: Element) => \n (element.getAttribute('aria-disabled') === 'true') || \n (element.hasAttribute('disabled')),\n \n getAriaExpanded: (element: Element) => \n element.getAttribute('aria-expanded') === 'true',\n \n getAriaLevel: (element: Element) => {\n const level = element.getAttribute('aria-level');\n return level ? parseInt(level, 10) : undefined;\n },\n \n getAriaPressed: (element: Element) => {\n const pressedAttr = element.getAttribute('aria-pressed');\n if (pressedAttr === 'mixed') return 'mixed';\n return pressedAttr === 'true';\n },\n \n getAriaSelected: (element: Element) => \n element.getAttribute('aria-selected') === 'true'\n};\n\nconst getElementComputedStyle = () => ({\n display: 'block'\n});\n\nfunction generateAriaTree(rootElement: Element) {\n const visited = new Set();\n \n const snapshot = {\n root: { \n role: 'fragment', \n name: '', \n children: [], \n element: rootElement \n },\n elements: new Map(),\n ids: new Map()\n };\n\n const addElement = (element: Element) => {\n const id = snapshot.elements.size + 1;\n snapshot.elements.set(id, element);\n snapshot.ids.set(element, id);\n };\n\n const visit = (ariaNode: any, node: Node) => {\n // Prevent infinite recursion\n if (visited.has(node)) return;\n visited.add(node);\n\n // Handle text nodes \n if (node.nodeType === Node.TEXT_NODE && node.textContent) {\n const trimmedText = node.textContent.trim();\n if (trimmedText) {\n ariaNode.children.push(trimmedText);\n }\n return;\n }\n\n // Skip non-element nodes and comments\n if (node.nodeType !== Node.ELEMENT_NODE) return;\n\n const element = node as Element;\n \n // Skip hidden elements\n if (roleUtils.isElementHiddenForAria(element)) return;\n\n addElement(element);\n const childAriaNode = toAriaNode(element);\n \n if (childAriaNode) {\n ariaNode.children.push(childAriaNode);\n }\n\n // Recursively process child nodes\n const children = node.childNodes;\n for (const child of children) {\n visit(childAriaNode || ariaNode, child);\n }\n };\n\n const toAriaNode = (element: Element) => {\n const role = roleUtils.getAriaRole(element);\n \n // Skip presentation and none roles\n if (!role || role === 'presentation' || role === 'none') return null;\n\n const name = roleUtils.getElementAccessibleName(element);\n const result: any = { \n role, \n name: name || '', \n children: [], \n element \n };\n\n // Add additional ARIA attributes\n if (roleUtils.kAriaCheckedRoles.includes(role))\n result.checked = roleUtils.getAriaChecked(element);\n \n if (roleUtils.kAriaDisabledRoles.includes(role))\n result.disabled = roleUtils.getAriaDisabled(element);\n \n if (roleUtils.kAriaExpandedRoles.includes(role))\n result.expanded = roleUtils.getAriaExpanded(element);\n \n if (roleUtils.kAriaLevelRoles.includes(role))\n result.level = roleUtils.getAriaLevel(element);\n \n if (roleUtils.kAriaPressedRoles.includes(role))\n result.pressed = roleUtils.getAriaPressed(element);\n \n if (roleUtils.kAriaSelectedRoles.includes(role))\n result.selected = roleUtils.getAriaSelected(element);\n\n return result;\n };\n\n // Start visiting from the root element\n visit(snapshot.root, rootElement);\n return snapshot;\n}\n\nfunction renderAriaTree(ariaNode: any, options = {}) {\n const lines: string[] = [];\n\n const visit = (node: any, indent = '') => {\n // Handle string nodes (text content)\n if (typeof node === 'string') {\n // Escape quotes and 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else {\n lines.push(`${indent}- ${key}:`);\n for (const child of node.children) {\n visit(child, indent + ' ');\n }\n }\n };\n\n // Start rendering from the root node\n visit(ariaNode);\n return lines.join('\\n');\n}","deleted",false,"label",[36],"b3822f18-2791-11f0-9d52-569c3dd06744","README.md","b3822f86-2791-11f0-9d52-569c3dd06744",1,["D",1735681281975],0,"compare 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Code