Životný cyklus v react js
Príklady kódu
metódy životného cyklu reagujú
Every component in React goes through a lifecycle of events. I like to think of them as going through a cycle of birth, growth, and death.
Mounting – Birth of your component
Update – Growth of your component
Unmount – Death of your componentmetóda životného cyklu reagovať
INITIALIZATION= setup props and state
MOUNTING= constructor->componentWillMount->render->componentDidMount//Birth
UPDATE= shouldComponentUpdate->componentWillUpdate->render
->componentDidUpdate //Growth
UNMOUNTING= componentWillUnmount //Deathživotný cyklus, ak reactjs
class Clock extends React.Component {
constructor(props) {
super(props);
this.state = {date: new Date()};
}
componentDidMount() { }
componentWillUnmount() { }
render() {
return (
<div>
<h1>Hello, world!</h1>
<h2>It is {this.state.date.toLocaleTimeString()}.</h2>
</div>
);
}
}Podobné stránky
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