schangxiang@126.com
2025-09-19 0821aa23eabe557c0d9ef5dbe6989c68be35d1fe
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# Is Lower Case
 
[![NPM version][npm-image]][npm-url]
[![NPM downloads][downloads-image]][downloads-url]
[![Build status][travis-image]][travis-url]
[![Test coverage][coveralls-image]][coveralls-url]
 
Check if a string is lower case.
 
## Installation
 
```
npm install is-lower-case --save
```
 
## Usage
 
```js
var isLowerCase = require('is-lower-case')
 
isLowerCase('string') //=> true
isLowerCase('String') //=> false
isLowerCase('STRING') //=> false
```
 
## Typings
 
Includes a [TypeScript definition](is-lower-case.d.ts).
 
## License
 
MIT
 
[npm-image]: https://img.shields.io/npm/v/is-lower-case.svg?style=flat
[npm-url]: https://npmjs.org/package/is-lower-case
[downloads-image]: https://img.shields.io/npm/dm/lower-case.svg?style=flat
[downloads-url]: https://npmjs.org/package/lower-case
[travis-image]: https://img.shields.io/travis/blakeembrey/is-lower-case.svg?style=flat
[travis-url]: https://travis-ci.org/blakeembrey/is-lower-case
[coveralls-image]: https://img.shields.io/coveralls/blakeembrey/is-lower-case.svg?style=flat
[coveralls-url]: https://coveralls.io/r/blakeembrey/is-lower-case?branch=master