ClassNames

A small utility to get classnames for css-modules and apply classes conditionally in react

Install

  yarn add @streamloots/classnames
  
  or
  
  npm i --save @streamloots/classnames

Usage

import ClassNames from '@streamloots/classnames';
import styles from './theme.scss';

const classNames = ClassNames(styles)

const Example = () => (
  <div
    className={classNames({
      example: true,
      hidden: false
    })}
  >
    <h1 className={classNames('example__title')}>hello world</h1>
    <h1 className={classNames('example__title margin-bottom')}>with classes</h1>
  </div>
)

<div class="example">
  <h1 class="example__title-as3221">hello world</h1>
  <h1 class="example__title-as3221 margin-bottom">with more classes</h1>
</div>

Use Cases

Local Classes and global classes

import ClassNames from '@streamloots/classnames';
import styles from './theme.scss';

const classNames = ClassNames(styles)

const Example = () => (
  <div>
    <h1 className={classNames('example__title')}>hello world</h1>
    <h1 className={classNames('example__title margin-bottom')}>with classes</h1>
  </div>
)

<div class="example">
  <h1 class="example__title-as3221">hello world</h1>
  <h1 class="example__title-as3221 margin-bottom">with classes</h1>
</div>

How to combine local classes and dynamic classes

const Input = ({disabled}) => (
  <div
    className={classNames({
      "form-group": true,
      "disabled": disabled
    })}
  >
    <input type="text" disabled={disabled} />
  </div>
)

const App = () => {
  return <Input disabled />
}

<div class="form-group-20202 disabled-20202">
  <input type="text" disabled />
</div>

Inject a className from a parent

const Input = ({className}) => (
  <div
    className={classNames({
      "form-group": true,
      "disabled": disabled,
      [className]: true,
    })}
  >
    <input type="text" disabled={disabled} />
  </div>
)

const App = () => {
  return <Input className="margin-bottom" disabled />
}

<div class="form-group-20202 disabled-20202 margin-bottom">
  <input type="text" disabled />
</div>

Local classes, dynamic classes, global classes and classNames from the parent

const Input = ({className}) => (
  <div
    className={classNames({
      "form-group margin-bottom": true,
      "disabled": disabled,
      [className]: true,
    })}
  >
    <input className={className('input margin-bottom')} type="text" disabled={disabled} />
  </div>
)

const App = () => {
  return <Input className="box-shadow" disabled />
}

<div class="form-group-20202 margin-bottom disabled-20202 box-shadow">
  <input type="text" disabled />
</div>

Contributing

Before contributing read the guidelines to submit a PR and what to do to publish the package