WebAssembly

Baseline

201710

WebAssembly JavaScript WebAssembly

WebAssembly Math Intl

.wasm

WebAssembly

WebAssembly.instantiate() WebAssembly
WebAssembly.Memory()/WebAssembly.Table()
WebAssembly.CompileError()/WebAssembly.LinkError()/WebAssembly.RuntimeError() WebAssembly

WebAssembly.CompileError: WebAssembly
WebAssembly.Global: JavaScript 1 WebAssembly.Module /
WebAssembly.Instance: WebAssembly.Module
WebAssembly.LinkError: ()
WebAssembly.Memory: buffer ArrayBuffer WebAssembly Instance
WebAssembly.Module: WebAssembly
WebAssembly.RuntimeError: WebAssembly ()
WebAssembly.Suspending: Promise JavaScript Wasm
WebAssembly.Table: WebAssembly ()
WebAssembly.Tag: WebAssembly 1
WebAssembly.Exception: WebAssembly/JavaScript WebAssembly

WebAssembly.JSTag: JavaScript WebAssembly.Tag JavaScript Wasm

WebAssembly.compile(): WebAssembly.Module WebAssembly
WebAssembly.compileStreaming(): WebAssembly.Module
WebAssembly.instantiate(): WebAssembly API Module Instance
WebAssembly.instantiateStreaming(): WebAssembly Module Instance
WebAssembly.promising(): WebAssembly.Suspending() Wasm Promise
WebAssembly.validate(): WebAssembly WebAssembly (true) (false)

.wasm

GitHub instantiate-streaming.html Wasm ResultObject instantiateStreaming() Response fetch()

const importObject = {
  my_namespace: { imported_func: (arg) => console.log(arg) },
};

WebAssembly.instantiateStreaming(fetch("simple.wasm"), importObject).then(
  (obj) => obj.instance.exports.exported_func(),
);

ResultObject instance


WebAssembly JavaScript Interface # webassembly-namespace

MDN

MDN 2026102

GitHub