mirror of https://github.com/jkjoy/sunpeiwen.git
44 lines
966 B
Markdown
44 lines
966 B
Markdown
# p-is-promise [](https://travis-ci.org/sindresorhus/p-is-promise)
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> Check if something is a promise
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Why not [`is-promise`](https://github.com/then/is-promise)? That module [checks for a thenable](https://github.com/then/is-promise/issues/6), not an ES2015 promise. This one is stricter.
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You most likely don't need this. Just pass your value to `Promise.resolve()` and let it handle it.
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Can be useful if you need to create a fast path for a synchronous operation.
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## Install
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```
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$ npm install p-is-promise
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```
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## Usage
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```js
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const pIsPromise = require('p-is-promise');
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const Bluebird = require('bluebird');
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pIsPromise(Promise.resolve('🦄'));
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//=> true
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pIsPromise(Bluebird.resolve('🦄'));
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//=> true
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pIsPromise('🦄');
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//=> false
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```
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## Related
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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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