p-timeout
Timeout a promise after a specified amount of time
Install
$ npm install p-timeout
Usage
import {setTimeout} from 'timers/promises';
import pTimeout from 'p-timeout';
const delayedPromise = setTimeout(200);
await pTimeout(delayedPromise, 50);
//=> [TimeoutError: Promise timed out after 50 milliseconds]API
pTimeout(input, milliseconds, message?, options?)
pTimeout(input, milliseconds, fallback?, options?)
Returns a decorated input that times out after milliseconds time. It has a .clear() method that clears the timeout.
If you pass in a cancelable promise, specifically a promise with a .cancel() method, that method will be called when the pTimeout promise times out.
input
Type: Promise
Promise to decorate.
milliseconds
Type: number
Milliseconds before timing out.
Passing Infinity will cause it to never time out.
message
Type: string | Error
Default: 'Promise timed out after 50 milliseconds'
Specify a custom error message or error.
If you do a custom error, it's recommended to sub-class pTimeout.TimeoutError.
fallback
Type: Function
Do something other than rejecting with an error on timeout.
You could for example retry:
import {setTimeout} from 'timers/promises';
import pTimeout from 'p-timeout';
const delayedPromise = () => setTimeout(200);
await pTimeout(delayedPromise(), 50, () => {
return pTimeout(delayedPromise(), 300);
});options
Type: object
customTimers
Type: object with function properties setTimeout and clearTimeout
Custom implementations for the setTimeout and clearTimeout functions.
Useful for testing purposes, in particular to work around sinon.useFakeTimers().
Example:
import {setTimeout} from 'timers/promises';
import pTimeout from 'p-timeout';
const originalSetTimeout = setTimeout;
const originalClearTimeout = clearTimeout;
sinon.useFakeTimers();
// Use `pTimeout` without being affected by `sinon.useFakeTimers()`:
await pTimeout(doSomething(), 2000, undefined, {
customTimers: {
setTimeout: originalSetTimeout,
clearTimeout: originalClearTimeout
}
});TimeoutError
Exposed for instance checking and sub-classing.
Related
- delay - Delay a promise a specified amount of time
- p-min-delay - Delay a promise a minimum amount of time
- p-retry - Retry a promise-returning function
- More…