Compare commits
1 Commits
| Author | SHA1 | Date | |
|---|---|---|---|
| e0597891e1 |
+95
-34
@@ -1,50 +1,111 @@
|
||||
import { useState, useReducer } from 'react'
|
||||
import React from 'react'
|
||||
|
||||
function counterReducer(state, action) {
|
||||
switch (action.type) {
|
||||
case 'increment':
|
||||
return state + 1
|
||||
case 'decrement':
|
||||
return state - 1
|
||||
case 'reset':
|
||||
return 0
|
||||
case 'set_value':
|
||||
return action.value
|
||||
default:
|
||||
return state
|
||||
}
|
||||
class ErrorBoundary extends React.Component {
|
||||
constructor(props) {
|
||||
super(props);
|
||||
this.state = {hasError: false};
|
||||
}
|
||||
|
||||
function Counter() {
|
||||
const [count, dispatch] = useReducer(counterReducer,0);
|
||||
static getDerivedStateFromError(error) {
|
||||
return { hasError: true }
|
||||
}
|
||||
|
||||
componentDidCatch(error,info) {
|
||||
console.log(error,info);
|
||||
}
|
||||
|
||||
handlerReset = () => {
|
||||
this.setState({hasError: false});
|
||||
}
|
||||
|
||||
render() {
|
||||
if (this.state.hasError) {
|
||||
return (
|
||||
<div>
|
||||
<span>Счетчик: {count}</span>
|
||||
<button onClick={()=> dispatch({type: 'increment'})}>+</button>
|
||||
<button onClick={()=> dispatch({type: 'decrement'})}>-</button>
|
||||
<button onClick={()=> dispatch({type: 'reset'})}>reset</button>
|
||||
<button onClick={()=> dispatch({type: 'set_value', value: 5})}>set 5</button>
|
||||
<h1>Что то поломалось</h1>
|
||||
<button onClick={this.handlerReset}>Повторить</button>
|
||||
</div>)
|
||||
}
|
||||
return this.props.children;
|
||||
}
|
||||
}
|
||||
|
||||
class AdvancedErrorBoundary extends React.Component {
|
||||
constructor(props) {
|
||||
super(props);
|
||||
this.state = {
|
||||
hasError: false,
|
||||
error: null,
|
||||
errorInfo: null
|
||||
}
|
||||
}
|
||||
|
||||
static getDerivedStateFromError(error) {
|
||||
return { hasErorr: true }
|
||||
}
|
||||
|
||||
componentDidCatch(error, info) {
|
||||
this.setState({
|
||||
error: error,
|
||||
errorInfo: info
|
||||
})
|
||||
}
|
||||
|
||||
handleReset = () => {
|
||||
this.setState({
|
||||
hasError:false,
|
||||
error: null,
|
||||
errorInfo:null
|
||||
});
|
||||
}
|
||||
|
||||
render() {
|
||||
if(this.state.hasError) {
|
||||
console.log('Error');
|
||||
return (
|
||||
<div>
|
||||
<h2>Произошла ошибка</h2>
|
||||
<p>Извеняемся, работаем, исправляем. Разработчика привязали к батарее</p>
|
||||
<button onClick={this.handleReset}>Попробовать снова</button>
|
||||
</div>
|
||||
)
|
||||
}
|
||||
//Если ошибок нет, то рендрим дочерние объекты
|
||||
return this.props.children
|
||||
}
|
||||
}
|
||||
|
||||
function ProblemComponent() {
|
||||
const [counter,setCounter] = React.useState(0)
|
||||
|
||||
const handlerClick = () => setCounter(counter + 1)
|
||||
|
||||
React.useEffect(() => {
|
||||
if (counter > 5) {
|
||||
throw new Error("Ошибка в компоненте");
|
||||
}
|
||||
},[counter]);
|
||||
return (
|
||||
<div>
|
||||
<h2>Счетчик: {counter}</h2>
|
||||
<button onClick={handlerClick}>Прибавить</button>
|
||||
</div>
|
||||
)
|
||||
}
|
||||
|
||||
function App() {
|
||||
const [tasks, setTasks] = useState([])
|
||||
const [filter, setFilter] = useState('all')
|
||||
const [sortBy,setSortBy] = useState('date')
|
||||
|
||||
const addTask = newTask => {
|
||||
setTasks([...tasks,newTask])
|
||||
}
|
||||
|
||||
|
||||
|
||||
return (
|
||||
<>
|
||||
{/* Добавьте тестовый контент для проверки */}
|
||||
<h1>Hello, React!</h1>
|
||||
<Counter />
|
||||
<h1>Обработка ошибок в компонентах</h1>
|
||||
<ErrorBoundary>
|
||||
<ProblemComponent />
|
||||
</ErrorBoundary>
|
||||
<ErrorBoundary>
|
||||
<ProblemComponent />
|
||||
</ErrorBoundary>
|
||||
<ErrorBoundary>
|
||||
<ProblemComponent />
|
||||
</ErrorBoundary>
|
||||
</>
|
||||
)
|
||||
}
|
||||
|
||||
@@ -1,15 +0,0 @@
|
||||
.container {
|
||||
/* display: flex;
|
||||
flex-direction: column;
|
||||
flex-wrap: nowrap;*/
|
||||
height: 500px;
|
||||
overflow: auto;
|
||||
border: 1px solid black;
|
||||
}
|
||||
.item {
|
||||
font-size: 16pt;
|
||||
border: 1px dotted gray;
|
||||
/*margin: 5px 10px;
|
||||
padding: 10px;*/
|
||||
border-radius: 5px;
|
||||
}
|
||||
Reference in New Issue
Block a user