shouldcomponentupdate example
Example 1: componentDidUpdate
componentDidUpdate(prevProps, prevState) {
if (prevState.pokemons !== this.state.pokemons) {
console.log('pokemons state has changed.')
}
}
Example 2: lifecycle method react
INITIALIZATION= setup props and state
MOUNTING= constructor->componentWillMount->render->componentDidMount
UPDATE= shouldComponentUpdate->componentWillUpdate->render
->componentDidUpdate
UNMOUNTING= componentWillUnmount
Example 3: shouldcomponentupdate
shouldComponentUpdate(nextProps, nextState) {
return true;
}
Example 4: component did mmount
componentDidUpdate(prevProps, prevState, snapshot)
Example 5: shouldcomponentupdate default return
By default, shouldComponentUpdate returns true, but you can override it to return false for cases that you do not want a re-render.