Compare commits

..

3 Commits

+40 -90
View File
@@ -1,108 +1,58 @@
import React from 'react' import React from 'react'
class MyComponent extends React.Component { class RandomUser extends React.Component {
constructor(props) { constructor(props) {
super(props); super(props)
this.state = { data: null }; this.state = { user: {} }
this.handleClick = this.handleClick.bind(this); }
componentDidMount() {
fetch('https://randomuser.me/api')
.then(responce => responce.json())
.then(json => this.setState({ user: json.results[0] }));
console.log('смонтирован')
}
componentDidUpdate(prevProps,prevState) {
console.log(this.state);
console.log('Компонент обнвлен')
}
componentWillUnmount() {
console.log('Компонент таймера размонтирован')
} }
render() { render() {
return ( return <div>
<div> {this.state.user &&
{this.state.data ? ( this.state.user.name &&
<div>Данные: {this.state.data}</div> (
) : ( <>
<div>Загрузка...</div> <h2>{this.state.user.name.first} {this.state.user.name.last}</h2>
)} <img src={this.state.user.picture.medium} />
<button onClick={this.handleClick}>Обновить</button> <button onClick={() => {
</div> console.log('Загружаем ... ')
fetch('https://randomuser.me/api')
.then(responce => responce.json())
.then(json => this.setState({ user: json.results[0] }));
}}>Загрузить нового</button>
</>
) )
} }
</div>
componentDidMount() {
fetch('https://api.example.com/data')
.then(responce => responce.json())
.then(json => this.setState({data: json}));
this.timerId = setInterval(()=> console.log('Tick'), 1000);
}
componentWillUnmout() {
clearInterval(this.timerId);
}
handleClick() {
this.setState({data: 'Данные'})
}
}
class MyComponent2 extends React.Component {
controller = new AbortController()
componentDidMount() {
fetch('https://api.example.com/data',{ singnal: this.controller.signal })
.then(responce => responce.json())
.then(json => this.setState({data: json}))
.catch(error => {
if(error.name == 'AbortError') {
console.log('Aborted');
} else {
console.log('Other error',error);
}
});
}
componentWillUnmount() {
this.controller.abort()
}
}
class MyComponent3 extends React.Component {
componentDidMount() {
this.loadData();
}
async loadData() {
try {
const response = await fetch('https://api.example.com/data');
const data = await response.json();
this.setSate({ data });
} catch {
console.log('error');
}
}
}
class Timer extends React.Component {
constructor(props) {
super(props);
this.state = { seconds: 0 }
}
componentDidMount() {
console.log('Timer mounted');
this.interval = setInterval(()=>{
this.setState(prevState => ({seconds: prevState.seconds + 1}))
},1000);
}
componentWillUnmount() {
console.log('Timer unmount');
clearInterval(this.interval);
}
render() {
return <h2>Прошло секунд: {this.state.seconds}</h2>
} }
} }
function App() { function App() {
const [show,setShow] = React.useState(true); const [showClock, setShowClock] = React.useState(true);
return ( return (
<> <>
<h1>Таймер с классом</h1> <h1>Домашнее задание: жизненый цикл</h1>
<button onClick={()=>setShow(prev => !prev)}>{show ? 'Скрыть' : 'Показать'} таймер</button> <button onClick={()=> setShowClock(!showClock)}>
{show && <Timer />} {showClock ? 'Скрыть часы' : 'Показать часы' }
</button>
{showClock && <RandomUser />}
</> </>
) )
} }