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# clsx [![CI](https://github.com/lukeed/clsx/workflows/CI/badge.svg)](https://github.com/lukeed/clsx/actions?query=workflow%3ACI) [![codecov](https://badgen.net/codecov/c/github/lukeed/clsx)](https://codecov.io/gh/lukeed/clsx)
> A tiny (228B) utility for constructing `className` strings conditionally.<Br>Also serves as a [faster](/bench) & smaller drop-in replacement for the `classnames` module.
This module is available in three formats:
* **ES Module**: `dist/clsx.m.js`
* **CommonJS**: `dist/clsx.js`
* **UMD**: `dist/clsx.min.js`
## Install
```
$ npm install --save clsx
```
## Usage
```js
import clsx from 'clsx';
// or
import { clsx } from 'clsx';
// Strings (variadic)
clsx('foo', true && 'bar', 'baz');
//=> 'foo bar baz'
// Objects
clsx({ foo:true, bar:false, baz:isTrue() });
//=> 'foo baz'
// Objects (variadic)
clsx({ foo:true }, { bar:false }, null, { '--foobar':'hello' });
//=> 'foo --foobar'
// Arrays
clsx(['foo', 0, false, 'bar']);
//=> 'foo bar'
// Arrays (variadic)
clsx(['foo'], ['', 0, false, 'bar'], [['baz', [['hello'], 'there']]]);
//=> 'foo bar baz hello there'
// Kitchen sink (with nesting)
clsx('foo', [1 && 'bar', { baz:false, bat:null }, ['hello', ['world']]], 'cya');
//=> 'foo bar hello world cya'
```
## API
### clsx(...input)
Returns: `String`
#### input
Type: `Mixed`
The `clsx` function can take ***any*** number of arguments, each of which can be an Object, Array, Boolean, or String.
> **Important:** _Any_ falsey values are discarded!<br>Standalone Boolean values are discarded as well.
```js
clsx(true, false, '', null, undefined, 0, NaN);
//=> ''
```
## Benchmarks
For snapshots of cross-browser results, check out the [`bench`](/bench) directory~!
## Support
All versions of Node.js are supported.
All browsers that support [`Array.isArray`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/isArray#Browser_compatibility) are supported (IE9+).
>**Note:** For IE8 support and older, please install `clsx@1.0.x` and beware of [#17](https://github.com/lukeed/clsx/issues/17).
## Related
- [obj-str](https://github.com/lukeed/obj-str) - A smaller (96B) and similiar utility that only works with Objects.
## License
MIT © [Luke Edwards](https://lukeed.com)
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