higherordercomp.js

let HigherOrderComp = (Component) => class extends React.Component{
  construstor(props){
    super(props);
    this.state = {
      count: 0
    };
  }
  
  componentDidMount(){
    setInterval(()=>{
      this.setState(
        count: this.state.count + 1
      );
    }, 1000)
  }
  
  render(){
    return <Component {...this.props} {...this.state}>
  }
}
  
  class Comp1 extends React.Component{
    render(){
      return(
        <div>
          <p>Comp1</p>
        </div>
      );
    }
  }

let Wrapped1 = HigherOrderComp(Comp1);

class App extends React.Component{
  constructor(props){
    super(props);
  }
  render(){
    return(
      <div>
      <Wrapped1/>
      </div>
    );
  }
}

ReactDOM.render(<App/>, document.getElementById('app'));