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54 lines
1.4 KiB
54 lines
1.4 KiB
4 years ago
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# p-pipe [](https://travis-ci.org/sindresorhus/p-pipe)
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> Compose promise-returning & async functions into a reusable pipeline
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## Install
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```
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$ npm install p-pipe
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```
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## Usage
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```js
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const pPipe = require('p-pipe');
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const addUnicorn = str => Promise.resolve(`${str} Unicorn`);
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const addRainbow = str => Promise.resolve(`${str} Rainbow`);
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const pipeline = pPipe(addUnicorn, addRainbow);
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pipeline('❤️').then(console.log);
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//=> '❤️ Unicorn Rainbow'
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```
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## API
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### pPipe(input, …)
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The `input` functions are applied from left to right.
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You can also specify an array as the first argument instead of multiple function arguments. Mostly only useful if you have to support Node.js 4. With Node.js 6 and above you can just use spread syntax.
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#### input
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Type: `Function`
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Expected to return a `Promise` or any value.
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## Related
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- [p-each-series](https://github.com/sindresorhus/p-each-series) - Iterate over promises serially
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- [p-series](https://github.com/sindresorhus/p-series) - Run promise-returning & async functions in series
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- [p-waterfall](https://github.com/sindresorhus/p-waterfall) - Run promise-returning & async functions in series, each passing its result to the next
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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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