test

gistfile1.js

import React from 'react'

class ContainerComponent extends React.Component {
  constructor(props) {
    super(props)

    this.state = {
      loaded: false
    }
  }

  componentDidMount() {
    const sheet = document.createElement('link')
    sheet.rel = 'stylesheet'
    sheet.href = 'http://css.com'
    sheet.type = 'text/css'
    sheet.onload = () => {
      this.setState({loaded: true})
    }
    document.head.appendChild(sheet)
  }

  render() {
    const {children} = this.props
    const {loaded} = this.state
    return (
      <div>
        {loaded ? children : null}
      </div>
    )
  }
}

export default ContainerComponent