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