any-signal

any-signal

Combines an array of AbortSignals into a single signal that is aborted when any signal is.

Install

npm install any-signal

Usage

const anySignal = require('any-signal')

const userController = new AbortController()
const timeoutController = new AbortController()

const combinedSignal = anySignal([userController.signal, timeoutController.signal])
combinedSignal.addEventListener('abort', () => console.log('Abort!'))

// Abort after 1 second
const timeoutId = setTimeout(() => timeoutController.abort(), 1000)

// The user or the timeout can now abort the action
await performSomeAction({ signal: combinedSignal })
clearTimeout(timeoutId)

// Clear will clean up internal event handlers
combinedSignal.clear()

API

anySignal(signals)

Parameters

Name	Type	Description
signals	Array<AbortSignal>	The Signals that will be observed and mapped to the returned Signal

Returns

Type	Description
ClearableSignal	A Signal that will be aborted as soon as any one of its parent signals are aborted. Extends AbortSignal with the clear function for cleanup

The returned ClearableSignal will only be aborted once, and as soon as one of its parent signals is aborted.

ClearableSignal.clear()

Removes all internal event handlers. This must be called after abort has been called, or the signals have successfully executed, otherwise there is a risk of leaking event handlers.

Acknowledgements

The anySignal function is taken from a comment by jakearchibald

LICENSE

MIT © Jacob Heun