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JavaScript library example using Emscripten

dist/my-lib.js vs dist/legacy/my-lib.js

dist/my-lib.js is built for modern browsers and bundlers.

  • APIs are exported as JavaScript modules (ESM)
    • Library users use this with import syntax in JavaScript
  • Uses WebAssembly for performance

dist/legacy/my-lib.js is build for compatibility.

  • APIs are exported in global scope
    • Library users use this <script> tag before main programs
  • Doesn't use WebAssembly

Requirements

  • POSIX shell
  • GNU Make 4.2.1
  • Emscripten 3.1.8
  • Node.js 14.18.2
  • npm 6.14.15

Build

npm install
npm run prepare
npm run build

Run Demo

HTML

npx serve

Then open demo.html or demo-legacy.html in your browsers and check DevTool console output.

JavaScript (Deno)

deno run demo-deno.js