90 lines
1.9 KiB
Markdown
90 lines
1.9 KiB
Markdown
# p-timeout [](https://travis-ci.org/sindresorhus/p-timeout)
|
|
|
|
> Timeout a promise after a specified amount of time
|
|
|
|
|
|
## Install
|
|
|
|
```
|
|
$ npm install p-timeout
|
|
```
|
|
|
|
|
|
## Usage
|
|
|
|
```js
|
|
const delay = require('delay');
|
|
const pTimeout = require('p-timeout');
|
|
|
|
const delayedPromise = delay(200);
|
|
|
|
pTimeout(delayedPromise, 50).then(() => 'foo');
|
|
//=> [TimeoutError: Promise timed out after 50 milliseconds]
|
|
```
|
|
|
|
|
|
## API
|
|
|
|
### pTimeout(input, milliseconds, [message | fallback])
|
|
|
|
Returns a decorated `input` that times out after `milliseconds` time.
|
|
|
|
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.
|
|
|
|
#### message
|
|
|
|
Type: `string` `Error`<br>
|
|
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:
|
|
|
|
```js
|
|
const delay = require('delay');
|
|
const pTimeout = require('p-timeout');
|
|
|
|
const delayedPromise = () => delay(200);
|
|
|
|
pTimeout(delayedPromise(), 50, () => {
|
|
return pTimeout(delayedPromise(), 300);
|
|
});
|
|
```
|
|
|
|
### pTimeout.TimeoutError
|
|
|
|
Exposed for instance checking and sub-classing.
|
|
|
|
|
|
## Related
|
|
|
|
- [delay](https://github.com/sindresorhus/delay) - Delay a promise a specified amount of time
|
|
- [p-min-delay](https://github.com/sindresorhus/p-min-delay) - Delay a promise a minimum amount of time
|
|
- [p-retry](https://github.com/sindresorhus/p-retry) - Retry a promise-returning function
|
|
- [More…](https://github.com/sindresorhus/promise-fun)
|
|
|
|
|
|
## License
|
|
|
|
MIT © [Sindre Sorhus](https://sindresorhus.com)
|