1
|
# p-is-promise [![Build Status](https://travis-ci.org/sindresorhus/p-is-promise.svg?branch=master)](https://travis-ci.org/sindresorhus/p-is-promise)
|
2
|
|
3
|
> Check if something is a promise
|
4
|
|
5
|
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.
|
6
|
|
7
|
You most likely don't need this. Just pass your value to `Promise.resolve()` and let it handle it.
|
8
|
|
9
|
Can be useful if you need to create a fast path for a synchronous operation.
|
10
|
|
11
|
|
12
|
## Install
|
13
|
|
14
|
```
|
15
|
$ npm install p-is-promise
|
16
|
```
|
17
|
|
18
|
|
19
|
## Usage
|
20
|
|
21
|
```js
|
22
|
const pIsPromise = require('p-is-promise');
|
23
|
const Bluebird = require('bluebird');
|
24
|
|
25
|
pIsPromise(Promise.resolve('🦄'));
|
26
|
//=> true
|
27
|
|
28
|
pIsPromise(Bluebird.resolve('🦄'));
|
29
|
//=> true
|
30
|
|
31
|
pIsPromise('🦄');
|
32
|
//=> false
|
33
|
```
|
34
|
|
35
|
|
36
|
## Related
|
37
|
|
38
|
- [More…](https://github.com/sindresorhus/promise-fun)
|
39
|
|
40
|
|
41
|
## License
|
42
|
|
43
|
MIT © [Sindre Sorhus](https://sindresorhus.com)
|