CounterHoc.js

const CounterHOC = ComposedComponent =>
  class extends Component {
    constructor(props) {
      super(props);

      this.state = {
        count: props.initCounter
      };
    }

    increase = () =>
      this.setState(prevState => ({ count: prevState.count + 1 }));
    decrease = () =>
      this.setState(prevState => ({ count: prevState.count - 1 }));

    render() {
      const { count } = this.state;
      return (
        <ComposedComponent
          count={count}
          increase={this.increase}
          decrease={this.decrease}
          {...this.props}
        />
      );
    }
  };