react set state from props code example

Example 1: state and props

What is the Props
Props is short for properties and they are used to pass data between React components. React’s data flow between components is uni-directional
wt is State
which allows components to create and manage their own data

Example 2: lifecycle method react

INITIALIZATION= setup props and state 
MOUNTING= constructor->componentWillMount->render->componentDidMount//Birth
UPDATE= shouldComponentUpdate->componentWillUpdate->render
  		->componentDidUpdate //Growth
UNMOUNTING= componentWillUnmount //Death

Example 3: react setState

this.setState({
      date: new Date()
    });

Example 4: component did mmount

componentDidUpdate(prevProps, prevState, snapshot)

Example 5: react change state

// React change state
this.setState({state to change:value});