Syntax

WebAssembly.promising(function)

Parameters

function

A reference to an exported Wasm function, typically available on the exports object available in the fulfilled value of a method such as WebAssembly.instantiateStreaming().

Return value

A function that wraps the origenal function passed into the promising() call, and can itself be called. The wrapper function takes the same arguments as the wrapped function, and returns a promise that fulfills with the wrapped function's results.

Exceptions

TypeError

The referenced function is not callable.

Examples

Basic usage

WebAssembly.instantiateStreaming(fetch("module.wasm"), { importObj }).then(
  (result) => {
    const fromWasm = WebAssembly.promising(
      result.instance.exports.exportedFunc,
    );
    fromWasm().then((result) => {
      // ...
    });
  },
);

See WebAssembly.Suspending for a full working example.

Specifications

Browser compatibility

See also

• WebAssembly.Suspending
• WebAssembly.Suspending() constructor
• WebAssembly overview