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