React CSS Accordion

gistfile1.js

import React, { Component } from 'react';

class Content extends Component {
  constructor (props) {
    super(props);

    this.state = {
      isActive: this.props.isActive,
      styles: {
        height: 0,
        overflow: 'hidden',
        transition: '250ms ease-in-out'
      }
    };
  }

  componentWillReceiveProps (nextProps) {
    this.setState({
      isActive: nextProps.isActive,
      styles: {
        height: nextProps.isActive ? `${this.refs.content.clientHeight}px` : 0,
        overflow: nextProps.isActive ? 'none' : 'hidden',
        transition: '250ms ease-in-out'
      }
    });
  }

  render () {
    return (
      <div className="Accordion-container" style={this.state.styles} ref="container">
        <div className="Accordion-content" ref="content">
          {this.props.children}
        </div>
      </div>
    );
  }
}

export default Content;