Created
April 8, 2025 06:45
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HTML Hash Modules (self contained JS modules in an HTML file)
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| <!doctype html> | |
| <html lang="en"> | |
| <body> | |
| <script type="hash-module" id="sum"> | |
| export const sum = (a, b) => a + b; | |
| </script> | |
| <!-- All hash modules need to go before this script. --> | |
| <!-- This cant be a type="module", it must be executed immediately. --> | |
| <script> | |
| // Ported from https://github.com/tomlarkworthy/lopecode | |
| const imports = {} | |
| document.querySelectorAll("script[type=hash-module]").forEach(module => { | |
| imports["#" + module.id] = URL.createObjectURL(new Blob([module.text], { type: "application/javascript" })) | |
| }) | |
| const importmap = document.createElement("script") | |
| importmap.type = "importmap" | |
| importmap.text = JSON.stringify({ imports }, null, 2) | |
| document.head.appendChild(importmap) | |
| </script> | |
| <script type="module"> | |
| import { sum } from "#sum" | |
| document.body.innerHTML = sum(1, 2) | |
| </script> | |
| </body> | |
| </html> |
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