component that should not update

ShouldNotUpdate.js

class ShouldNotUpdate extends React.Component {
  constructor(props) {
    super(props);
    this.counter = 0;
  }
  
  shouldComponentUpdate(nextProps, nextState) {
    return this.props.children !== nextProps.children;    
  }
  
  render() {
    return `I should be rendered only 1 time. actual times rendered: ${++this.counter}`;
  }
}
// In parent render: <ShouldNotUpdate><div/></ShouldNotUpdate>