forked from enviPath/enviPy
37 lines
526 B
Markdown
37 lines
526 B
Markdown
# is-defined [](https://travis-ci.org/bendrucker/is-defined)
|
|
|
|
> Check if an identifier is defined
|
|
|
|
|
|
## Install
|
|
|
|
```
|
|
$ npm install --save is-defined
|
|
```
|
|
|
|
|
|
## Usage
|
|
|
|
```js
|
|
var isDefined = require('is-defined')
|
|
|
|
isDefined('window')
|
|
//=> typeof window !== 'undefined'
|
|
```
|
|
|
|
## API
|
|
|
|
#### `isDefined(identifier)` -> `string`
|
|
|
|
##### identifier
|
|
|
|
*Required*
|
|
Type: `string`
|
|
|
|
A JavaScript identifier.
|
|
|
|
|
|
## License
|
|
|
|
MIT © [Ben Drucker](http://bendrucker.me)
|