@sindresorhus/class-names

class-names

Conditionally join CSS class names together - Especially useful with React

Install

$ npm install @sindresorhus/class-names

Usage

const classNames = require('@sindresorhus/class-names');
 
classNames('unicorn', 'rainbow');
//=> 'unicorn rainbow'
 
classNames({awesome: true, foo: false}, 'unicorn', {rainbow: false});
//=> 'awesome unicorn'
 
classNames('unicorn', null, undefined, 0, 1, {foo: null});
//=> 'unicorn'
 
const buttonType = 'main';
classNames({[`button-${buttonType}`]: true});
//=> 'button-main'

const classNames = require('@sindresorhus/class-names');
 
const Button = props => {
    console.log(props);
    /*
    {
        type: 'success',
        small: true
    }
    */
 
    const buttonClass = classNames(
        'button',
        {
            [`button-${props.type}`]: props.type,
            'button-block': props.block,
            'button-small': props.small
        }
    );
 
    console.log(buttonClass);
    //=> 'button button-success button-small'
 
    return <button className={buttonClass}>…</button>;
};

API

classNames(…input)

Conditionally join CSS class names together.

input

Type: string | object

Accepts a combination of strings and objects. When an object, only object keys with truthy values are included. Anything else is ignored.

FAQ

How is it different from classnames?

• Dedupes by default.
• Doesn't coerce numbers to strings.
• Doesn't support array input. Just use the spread operator.

Related

• react-extras - Useful components and utilities for working with React

License

MIT © Sindre Sorhus