探索React错误边界:react-error-boundary开源项目详解
}>
```
### 2. 使用`ErrorBoundary` with `fallbackRender` prop
这种方式允许我们基于抛出的错误值返回一个备用UI。
```js
"use client";
import { ErrorBoundary } from "react-error-boundary";
function fallbackRender({ error, resetErrorBoundary }) {
return (
);
}
{
// Reset the state of your app so the error doesn't happen again
}}
>
;
```
### 3. 使用`ErrorBoundary` with `FallbackComponent` prop
这种方式允许我们定义一个React组件来返回备用UI。
```js
"use client";
import { ErrorBoundary } from "react-error-boundary";
function Fallback({ error, resetErrorBoundary }) {
return (
);
}
{
// Reset the state of your app so the error doesn't happen again
}}
>
;
```
### 4. 使用`onError`进行错误日志记录
```js
"use client";
import { ErrorBoundary } from "react-error-boundary";
const logError = (error: Error, info: { componentStack: string }) => {
// Do something with the error, e.g. log to an external API
};
const ui = (
);
```
## 安装与配置指南
首先,您需要安装`react-error-boundary`:
```sh
npm install react-error-boundary
```
或者在项目中使用以下代码:
```sh
pnpm add react-error-boundary
```
或者:
```sh
yarn add react-error-boundary
```
然后,您可以根据上述示例在项目中使用`ErrorBoundary`。
## 实战案例分析
在实际应用中,我们可以将`ErrorBoundary`包裹在可能抛出错误的组件周围,例如在处理异步请求的组件中:
```js
import React, { useEffect } from 'react';
import { ErrorBoundary } from 'react-error-boundary';
function AsyncComponent() {
useEffect(() => {
fetch('/api/data')
.then(response => response.json())
.then(data => {
// 处理数据
})
.catch(error => {
// 抛出错误
throw error;
});
}, []);
return 加载失败,请稍后重试
}>
Something went wrong:
{error.message}
Something went wrong:
{error.message}
异步数据展示
;
}
function App() {
return (
Something went wrong:
{error.message}
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