93 lines
1.8 KiB
Markdown
93 lines
1.8 KiB
Markdown
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# p-reflect [](https://travis-ci.org/sindresorhus/p-reflect)
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> Make a promise always fulfill with its actual fulfillment value or rejection reason
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Useful when you want a promise to fulfill no matter what and would rather handle the actual state afterwards.
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## Install
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```
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$ npm install p-reflect
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```
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## Usage
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Here, `Promise.all` would normally fail early because one of the promises rejects, but by using `p-reflect`, we can ignore the rejection and handle it later on.
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```js
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const pReflect = require('p-reflect');
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(async () => {
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const promises = [
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getPromise(),
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getPromiseThatRejects(),
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getPromise()
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];
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const results = await Promise.all(promises.map(pReflect));
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console.log(results);
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/*
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[
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{
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isFulfilled: true,
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isRejected: false,
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value: '🦄'
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},
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{
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isFulfilled: false,
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isRejected: true,
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reason: [Error: 👹]
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},
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{
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isFulfilled: true,
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isRejected: false,
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value: '🐴'
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}
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]
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*/
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const resolvedString = results
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.filter(result => result.isFulfilled)
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.map(result => result.value)
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.join('');
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console.log(resolvedString);
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//=> '🦄🐴'
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})();
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```
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The above is just an example. Use [`p-settle`](https://github.com/sindresorhus/p-settle) if you need this.
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## API
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### pReflect(promise)
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Returns a `Promise<Object>`.
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The object has the following properties:
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- `isFulfilled`
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- `isRejected`
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- `value` or `reason` *(Depending on whether the promise fulfilled or rejected)*
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#### promise
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Type: `Promise`
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A promise to reflect upon.
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## Related
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- [p-settle](https://github.com/sindresorhus/p-settle) - Settle promises concurrently and get their fulfillment value or rejection reason
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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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