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March 23, 2024 04:53
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Dynamic importmap content loading from JSON file
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| { | |
| "imports": { | |
| "react": "https://esm.sh/stable/[email protected]/es2022/react.mjs", | |
| "react-dom/client": "https://esm.sh/stable/[email protected]/es2022/client.js" | |
| } | |
| } |
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| <!DOCTYPE html> | |
| <html lang="en"> | |
| <head> | |
| <meta charset="UTF-8" /> | |
| <meta name="viewport" content="width=device-width, initial-scale=1.0" /> | |
| <title>Document</title> | |
| <script> | |
| const getImportmapData = () => { | |
| const request = new XMLHttpRequest() | |
| request.open('GET', './importmap.json', false) // `false` makes the request synchronous | |
| request.send() | |
| if (request.status === 200) { | |
| return JSON.parse(request.response) | |
| } | |
| return null | |
| } | |
| const importmapData = getImportmapData() | |
| const im = document.createElement('script') | |
| im.type = 'importmap' | |
| im.textContent = JSON.stringify(importmapData) | |
| document.currentScript.after(im) | |
| </script> | |
| <script type="module"> | |
| import React from 'react' | |
| import { createRoot } from 'react-dom/client' | |
| const root = createRoot(document.getElementById('app')) | |
| root.render(React.createElement('h1', null, 'Hello from React')) | |
| </script> | |
| </head> | |
| <body> | |
| <div id="app"></div> | |
| </body> | |
| </html> |
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