WebAssembly.Module() constructor
A WebAssembly.Module()
constructor creates a new Module
object containing stateless WebAssembly code that has already been compiled by the
browser and can be efficiently shared
with Workers, and instantiated multiple times.
The WebAssembly.Module()
constructor function can be called to
synchronously compile given WebAssembly binary code. However, the primary way to get a
Module
is through an asynchronous compilation function like
WebAssembly.compile()
.
Syntax
Important: Since compilation for large modules can be expensive,
developers should only use the Module()
constructor when synchronous
compilation is absolutely required; the asynchronous
WebAssembly.compileStreaming()
method should be used at all other times.
new WebAssembly.Module(bufferSource);
Parameters
- bufferSource
- A typed array or ArrayBuffer containing the binary code of the .wasm module you want to compile.
Examples
Synchronously compiling a WebAssembly module
var importObject = {
imports: {
imported_func: function(arg) {
console.log(arg);
}
}
};
function createWasmModule(bytes) {
return new WebAssembly.Module(bytes);
}
fetch('simple.wasm').then(response =>
response.arrayBuffer()
).then(bytes => {
let mod = createWasmModule(bytes);
WebAssembly.instantiate(mod, importObject)
.then(result =>
result.exports.exported_func()
);
})
Specifications
Specification |
---|
WebAssembly JavaScript Interface The definition of 'WebAssembly.Module()' in that specification. |
Browser compatibility
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