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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

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

If bufferSource is not a typed array or ArrayBuffer, the promise rejects with a TypeError.
If compilation fails, the promise rejects with a WebAssembly.CompileError.

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().

const 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: Exception Handling # dom-webassembly-compile

Browser compatibility

	Desktop						Mobile						Server
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari	WebView Android	Chrome Android	Firefox for Android	Opera Android	Safari on IOS	Samsung Internet	Deno	Node.js
`compile`	57	16	52	No	44	11	57	57	52	43	11	7.0	1.0	8.0.0