return from componentdidunmount code example

Example 1: shouldcomponentupdate

shouldComponentUpdate(nextProps, nextState) {
  return true;
}

Example 2: react lifecycle

constructor(props) {
  super(props);
  // Don't call this.setState() here!
  this.state = { counter: 0 };
  this.handleClick = this.handleClick.bind(this);
}