react propswillchange changed code example
Example 1: lifecycle method react
INITIALIZATION= setup props and state
MOUNTING= constructor->componentWillMount->render->componentDidMount//Birth
UPDATE= shouldComponentUpdate->componentWillUpdate->render
->componentDidUpdate //Growth
UNMOUNTING= componentWillUnmount //Death
Example 2: shouldcomponentupdate
shouldComponentUpdate(nextProps, nextState) {
return true;
}