70 lines
1.4 KiB
Markdown
70 lines
1.4 KiB
Markdown
# p-limit [](https://travis-ci.org/sindresorhus/p-limit)
|
|
|
|
> Run multiple promise-returning & async functions with limited concurrency
|
|
|
|
|
|
## Install
|
|
|
|
```
|
|
$ npm install p-limit
|
|
```
|
|
|
|
|
|
## Usage
|
|
|
|
```js
|
|
const pLimit = require('p-limit');
|
|
|
|
const limit = pLimit(1);
|
|
|
|
const input = [
|
|
limit(() => fetchSomething('foo')),
|
|
limit(() => fetchSomething('bar')),
|
|
limit(() => doSomething())
|
|
];
|
|
|
|
(async () => {
|
|
// Only one promise is run at once
|
|
const result = await Promise.all(input);
|
|
console.log(result);
|
|
})();
|
|
```
|
|
|
|
|
|
## API
|
|
|
|
### pLimit(concurrency)
|
|
|
|
Returns a `limit` function.
|
|
|
|
#### concurrency
|
|
|
|
Type: `number`<br>
|
|
Minimum: `1`
|
|
|
|
Concurrency limit.
|
|
|
|
### limit(fn)
|
|
|
|
Returns the promise returned by calling `fn`.
|
|
|
|
#### fn
|
|
|
|
Type: `Function`
|
|
|
|
Promise-returning/async function.
|
|
|
|
|
|
## Related
|
|
|
|
- [p-queue](https://github.com/sindresorhus/p-queue) - Promise queue with concurrency control
|
|
- [p-throttle](https://github.com/sindresorhus/p-throttle) - Throttle promise-returning & async functions
|
|
- [p-debounce](https://github.com/sindresorhus/p-debounce) - Debounce promise-returning & async functions
|
|
- [p-all](https://github.com/sindresorhus/p-all) - Run promise-returning & async functions concurrently with optional limited concurrency
|
|
- [More…](https://github.com/sindresorhus/promise-fun)
|
|
|
|
|
|
## License
|
|
|
|
MIT © [Sindre Sorhus](https://sindresorhus.com)
|