WebAssembly.compile()

The WebAssembly.compile() function compiles WebAssembly binary code into a WebAssembly.Module object. This function is useful if it is necessary to a compile a module before it can be instantiated (otherwise, the WebAssembly.instantiate() function should be used).

Syntax

Promise<WebAssembly.Module> WebAssembly.compile(bufferSource);

Parameters

bufferSource
A typed array or ArrayBuffer containing the binary code of the .wasm module you want to compile.

Return value

A Promise that resolves to a WebAssembly.Module object representing the compiled module.

Exceptions

Examples

Using compile

The following example compiles the loaded simple.wasm byte code using the compile() function and then sends it to a worker using postMessage().

var worker = new Worker("wasm_worker.js");

fetch('simple.wasm').then(response =>
  response.arrayBuffer()
).then(bytes =>
  WebAssembly.compile(bytes)
).then(mod =>
  worker.postMessage(mod)
);

Note: You'll probably want to use WebAssembly.compileStreaming() in most cases, as it is more efficient than compile().

Specifications

Specification
WebAssembly JavaScript Interface
The definition of 'compile()' in that specification.

Browser compatibility

DesktopMobileServer
ChromeEdgeFirefoxInternet ExplorerOperaSafariAndroid webviewChrome for AndroidFirefox for AndroidOpera for AndroidSafari on iOSSamsung InternetNode.js
compileChrome Full support 57Edge Full support 16Firefox Full support 52
Notes
Full support 52
Notes
Notes Disabled in the Firefox 52 Extended Support Release (ESR).
IE No support NoOpera Full support 44Safari Full support 11WebView Android Full support 57Chrome Android Full support 57Firefox Android Full support 52
Notes
Full support 52
Notes
Notes Disabled in the Firefox 52 Extended Support Release (ESR).
Opera Android Full support 43Safari iOS Full support 11Samsung Internet Android Full support 7.0nodejs Full support 8.0.0

Legend

Full support
Full support
No support
No support
See implementation notes.
See implementation notes.

See also