offload-fn

Run a function in a Worker thread and get back a promise

Install

npm install offload-fn

Usage

import offloadFunction from 'offload-fn';

const result = await offloadFunction((a, b) => a + b, 2, 3);
//=> 5

// CPU-intensive work
const sum = await offloadFunction(n => {
	let total = 0;
	for (let i = 0; i < n; i++) {
		total += i;
	}
	return total;
}, 1_000_000);

API

offloadFunction(function_, ...arguments_)

Returns a Promise that resolves with the function's return value.

Serializes the function to a string and runs it inside a Worker thread. Arguments and return values must be serializable via the structured clone algorithm.

function_

Type: Function

The function to execute in a Worker thread.

arguments_

Type: unknown[]

Arguments to pass to the function.

Limitations

• The function cannot reference closure variables — it is serialized to a string.
• Arguments must be serializable (structured clone).
• The return value must be serializable (structured clone).

Related

• perf-fn - Measure function execution time

License

MIT