20862be7d0
- slim/slim: ^3.1 - symfony/expression-language: ^3.4 - fxp/composer-asset-plugin: ~1.3 - bower-asset/vue: ^2.5 - bower-asset/vue-resource: ^1.5
44 lines
973 B
Markdown
44 lines
973 B
Markdown
# p-is-promise [](https://travis-ci.org/sindresorhus/p-is-promise)
|
|
|
|
> Check if something is a promise
|
|
|
|
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.
|
|
|
|
You most likely don't need this. Just pass your value to `Promise.resolve()` and let it handle it.
|
|
|
|
Can be useful if you need to create a fast path for a synchronous operation.
|
|
|
|
|
|
## Install
|
|
|
|
```
|
|
$ npm install --save p-is-promise
|
|
```
|
|
|
|
|
|
## Usage
|
|
|
|
```js
|
|
const pIsPromise = require('p-is-promise');
|
|
const Bluebird = require('bluebird');
|
|
|
|
pIsPromise(Promise.resolve('🦄'));
|
|
//=> true
|
|
|
|
pIsPromise(Bluebird.resolve('🦄'));
|
|
//=> true
|
|
|
|
pIsPromise('🦄');
|
|
//=> false
|
|
```
|
|
|
|
|
|
## Related
|
|
|
|
- [More…](https://github.com/sindresorhus/promise-fun)
|
|
|
|
|
|
## License
|
|
|
|
MIT © [Sindre Sorhus](https://sindresorhus.com)
|