componentDidMount() {

    const LeftHeight = window.getComputedStyle(this.leftDom).height;

    console.log(LeftHeight);

    setTimeout(function(){

      const LeftHeight = window.getComputedStyle(this.leftDom).height;

      console.log(LeftHeight);

    }.bind(this),1000)

  }

 return (

      <ContentWarp>

        <div className={ left } ref={ dom => { this.leftDom = dom } }>

          <ContentLeft/>

        </div>

        <div className={ right }>

          <ContentRight/>

        </div>

      </ContentWarp>

    )

  }