classnames

使用 classNames 来组合条件结果.

// bad
render () {
  return <div className={'menu ' + this.props.display ? 'active' : ''} />
}

// good
render () {
  const classes = {
    menu: true,
    active: this.props.display
  }
  return <div className={classnames(classes)} />
}

Read: Class Name Manipulation