Beginner's Guide to WebAssembly: High-Performance Web Apps

WebAssembly (Wasm) is a binary instruction format that enables high-performance applications to run on web browsers.

• Game development – Near-native performance
• Video/audio editing – Processing-heavy tasks
• Scientific computing – Complex calculations
• Legacy apps – Port desktop apps to web

Hello World in WAT

(module
  (func $add (param $a i32) (param $b i32) (result i32)
    local.get $a
    local.get $b
    i32.add)
  (export "add" (func $add)))

Using Wasm in JavaScript

WebAssembly.instantiateStreaming(fetch('module.wasm'))
  .then(results => {
    const add = results.instance.exports.add;
    console.log(add(5, 3)); // 8
  });

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