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// test.jsx

import i18n from '@/i18n'; // test.jsx

import React, { useState, useEffect, useCallback, useMemo } from 'react';

import PropTypes from 'prop-types';

// 模拟的 API 调用函数

const fetchUserData = () => {

return new Promise((resolve) => {

setTimeout(() => {

resolve({

name: '张三',

name: i18n.t('demoTest-test-jsx-befor-192991598bc5aa541-1'),

age: 30,

occupation: '软件工程师',

occupation: i18n.t('demoTest-test-jsx-befor-192991598bc5aa541-2'),

});

}, 1000);

});

};

// 错误边界组件

class ErrorBoundary extends React.Component {

constructor(props) {

super(props);

this.state = { hasError: false, error: null };

}

static getDerivedStateFromError(error) {

return { hasError: true, error };

}

componentDidCatch(error, errorInfo) {

console.error('错误边界捕获到错误:', error, errorInfo);

}

render() {

if (this.state.hasError) {

return <h2>很抱歉，出现了错误：{this.state.error.message}</h2>;

return (

<h2>

{i18n.t('demoTest-test-jsx-befor-192991598bc5aa541-3')}

{this.state.error.message}

</h2>

);

}

return this.props.children;

}

// 头部组件

const Header = ({ title }) => (

<h1>{title}</h1>

<nav>

<ul>

<li>

{i18n.t('demoTest-test-jsx-befor-192991598bc5aa541-4')}

</a>

</li>

<li>

{i18n.t('demoTest-test-jsx-befor-192991598bc5aa541-5')}

</a>

</li>

<li>

{i18n.t('demoTest-test-jsx-befor-192991598bc5aa541-6')}

</a>

</li>

</ul>

</nav>

</header>

);

Header.propTypes = {

title: PropTypes.string.isRequired,

};

// 用户信息组件

const UserInfo = ({ user }) => (

<h3>{user.name}的个人信息</h3>

<h3>

{user.name}

<p>职业：{user.occupation}</p>

{i18n.t('demoTest-test-jsx-befor-192991598bc5aa541-7')}

</h3>

<p>

{i18n.t('demoTest-test-jsx-befor-192991598bc5aa541-8')}

{user.age}

</p>

<p>

{i18n.t('demoTest-test-jsx-befor-192991598bc5aa541-9')}

{user.occupation}

</p>

</div>

);

// 计数器组件

const Counter = () => {

const [count, setCount] = useState(0);

const increment = () => setCount((prevCount) => prevCount + 1);

const decrement = () => setCount((prevCount) => prevCount - 1);

return (

<div>

<h3>{i18n.t('demoTest-test-jsx-befor-192991598bc5aa541-10')}</h3>

<p>当前计数：{count}</p>

<p>

{i18n.t('demoTest-test-jsx-befor-192991598bc5aa541-11')}

{count}

</p>

{i18n.t('demoTest-test-jsx-befor-192991598bc5aa541-12')}

</button>

{i18n.t('demoTest-test-jsx-befor-192991598bc5aa541-13')}

</button>

</div>

);

};

// 待办事项组件

const TodoList = () => {

const [todos, setTodos] = useState([]);

const [inputValue, setInputValue] = useState('');

const handleInputChange = (e) => setInputValue(e.target.value);

const handleSubmit = (e) => {

e.preventDefault();

if (inputValue.trim()) {

setTodos([

...todos,

{ id: Date.now(), text: inputValue, completed: false },

]);

setInputValue('');

}

};

const toggleTodo = (id) => {

setTodos(

todos.map((todo) =>

todo.id === id ? { ...todo, completed: !todo.completed } : todo,

);

};

return (

<div>

<h3>{i18n.t('demoTest-test-jsx-befor-192991598bc5aa541-14')}</h3>

<input

type="text"

value={inputValue}

onChange={handleInputChange}

placeholder="输入新的待办事项"

placeholder={i18n.t('demoTest-test-jsx-befor-192991598bc5aa541-15')}

{i18n.t('demoTest-test-jsx-befor-192991598bc5aa541-16')}

</button>

</form>

<ul>

{todos.map((todo) => (

<li

key={todo.id}

onClick={() => toggleTodo(todo.id)}

style={{ textDecoration: todo.completed ? 'line-through' : 'none' }}

{todo.text}

</li>

))}

</ul>

</div>

);

};

// 主应用组件

const App = () => {

const [user, setUser] = useState(null);

const [isLoading, setIsLoading] = useState(true);

const [error, setError] = useState(null);

useEffect(() => {

fetchUserData()

.then((data) => {

setUser(data);

setIsLoading(false);

})

.catch((err) => {

setError('获取用户数据时出错');

setError(i18n.t('demoTest-test-jsx-befor-192991598bc5aa541-17'));

setIsLoading(false);

console.error('获取用户数据失败:', err);

});

}, []);

const welcomeMessage = useMemo(() => {

return user ? `欢迎回来，${user.name}！` : '欢迎来到我们的应用！';

return user

? `${i18n.t('demoTest-test-jsx-befor-192991598bc5aa541-18')}${user.name}！`

: i18n.t('demoTest-test-jsx-befor-192991598bc5aa541-19');

}, [user]);

const handleError = useCallback(() => {

throw new Error('这是一个故意抛出的错误');

}, []);

if (isLoading) return <div>加载中，请稍候...</div>;

if (isLoading)

if (error) return <div>错误：{error}</div>;

return <div>{i18n.t('demoTest-test-jsx-befor-192991598bc5aa541-20')}</div>;

if (error)

return (

<div>

{i18n.t('demoTest-test-jsx-befor-192991598bc5aa541-21')}

{error}

</div>

);

return (

<Header

title={i18n.t('demoTest-test-jsx-befor-192991598bc5aa541-22')}

<main>

<h2>{welcomeMessage}</h2>

{user && <UserInfo user={user} />}

<button onClick={handleError}>点击触发错误</button>

{i18n.t('demoTest-test-jsx-befor-192991598bc5aa541-23')}

</button>

</main>

<p>{i18n.t('demoTest-test-jsx-befor-192991598bc5aa541-24')}</p>

</footer>

</div>

</ErrorBoundary>

);

};

export default App;

저장된 비교 결과

원본

파일 열기

// test.jsx
import React, { useState, useEffect, useCallback, useMemo } from 'react';
import PropTypes from 'prop-types';

// 模拟的 API 调用函数
const fetchUserData = () => {
  return new Promise((resolve) => {
    setTimeout(() => {
      resolve({
        name: '张三',
        age: 30,
        occupation: '软件工程师',
      });
    }, 1000);
  });
};

// 错误边界组件
class ErrorBoundary extends React.Component {
  constructor(props) {
    super(props);
    this.state = { hasError: false, error: null };
  }

static getDerivedStateFromError(error) {
    return { hasError: true, error };
  }

componentDidCatch(error, errorInfo) {
    console.error('错误边界捕获到错误:', error, errorInfo);
  }

render() {
    if (this.state.hasError) {
      return <h2>很抱歉，出现了错误：{this.state.error.message}</h2>;
    }
    return this.props.children;
  }
}

// 头部组件
const Header = ({ title }) => (
  <header>
    <h1>{title}</h1>
    <nav>
      <ul>
        <li>
          <a href="#home">首页</a>
        </li>
        <li>
          <a href="#about">关于我们</a>
        </li>
        <li>
          <a href="#contact">联系方式</a>
        </li>
      </ul>
    </nav>
  </header>
);

Header.propTypes = {
  title: PropTypes.string.isRequired,
};

// 用户信息组件
const UserInfo = ({ user }) => (
  <div className="user-info">
    <h3>{user.name}的个人信息</h3>
    <p>年龄：{user.age}</p>
    <p>职业：{user.occupation}</p>
  </div>
);

// 计数器组件
const Counter = () => {
  const [count, setCount] = useState(0);

const increment = () => setCount((prevCount) => prevCount + 1);
  const decrement = () => setCount((prevCount) => prevCount - 1);

return (
    <div>
      <h3>计数器</h3>
      <p>当前计数：{count}</p>
      <button onClick={increment}>增加</button>
      <button onClick={decrement}>减少</button>
    </div>
  );
};

// 待办事项组件
const TodoList = () => {
  const [todos, setTodos] = useState([]);
  const [inputValue, setInputValue] = useState('');

const handleInputChange = (e) => setInputValue(e.target.value);

const toggleTodo = (id) => {
    setTodos(
      todos.map((todo) =>
        todo.id === id ? { ...todo, completed: !todo.completed } : todo,
      ),
    );
  };

return (
    <div>
      <h3>待办事项</h3>
      <form onSubmit={handleSubmit}>
        <input
          type="text"
          value={inputValue}
          onChange={handleInputChange}
          placeholder="输入新的待办事项"
        />
        <button type="submit">添加</button>
      </form>
      <ul>
        {todos.map((todo) => (
          <li
            key={todo.id}
            onClick={() => toggleTodo(todo.id)}
            style={{ textDecoration: todo.completed ? 'line-through' : 'none' }}
          >
            {todo.text}
          </li>
        ))}
      </ul>
    </div>
  );
};

// 主应用组件
const App = () => {
  const [user, setUser] = useState(null);
  const [isLoading, setIsLoading] = useState(true);
  const [error, setError] = useState(null);

useEffect(() => {
    fetchUserData()
      .then((data) => {
        setUser(data);
        setIsLoading(false);
      })
      .catch((err) => {
        setError('获取用户数据时出错');
        setIsLoading(false);
        console.error('获取用户数据失败:', err);
      });
  }, []);

const welcomeMessage = useMemo(() => {
    return user ? `欢迎回来，${user.name}！` : '欢迎来到我们的应用！';
  }, [user]);

const handleError = useCallback(() => {
    throw new Error('这是一个故意抛出的错误');
  }, []);

if (isLoading) return <div>加载中，请稍候...</div>;
  if (error) return <div>错误：{error}</div>;

return (
    <ErrorBoundary>
      <div className="app">
        <Header title="我的 React 应用" />
        <main>
          <h2>{welcomeMessage}</h2>
          {user && <UserInfo user={user} />}
          <Counter />
          <TodoList />
          <button onClick={handleError}>点击触发错误</button>
        </main>
        <footer>
          <p>© 2024 我的 React 应用。保留所有权利。</p>
        </footer>
      </div>
    </ErrorBoundary>
  );
};

export default App;

수정본

파일 열기

import i18n from '@/i18n'; // test.jsx
import React, { useState, useEffect, useCallback, useMemo } from 'react';
import PropTypes from 'prop-types';

// 模拟的 API 调用函数
const fetchUserData = () => {
  return new Promise((resolve) => {
    setTimeout(() => {
      resolve({
        name: i18n.t('demoTest-test-jsx-befor-192991598bc5aa541-1'),
        age: 30,
        occupation: i18n.t('demoTest-test-jsx-befor-192991598bc5aa541-2'),
      });
    }, 1000);
  });
};

// 错误边界组件
class ErrorBoundary extends React.Component {
  constructor(props) {
    super(props);
    this.state = { hasError: false, error: null };
  }

static getDerivedStateFromError(error) {
    return { hasError: true, error };
  }

componentDidCatch(error, errorInfo) {
    console.error('错误边界捕获到错误:', error, errorInfo);
  }

render() {
    if (this.state.hasError) {
      return (
        <h2>
          {i18n.t('demoTest-test-jsx-befor-192991598bc5aa541-3')}
          {this.state.error.message}
        </h2>
      );
    }
    return this.props.children;
  }
}

// 头部组件
const Header = ({ title }) => (
  <header>
    <h1>{title}</h1>
    <nav>
      <ul>
        <li>
          <a href="#home">
            {i18n.t('demoTest-test-jsx-befor-192991598bc5aa541-4')}
          </a>
        </li>
        <li>
          <a href="#about">
            {i18n.t('demoTest-test-jsx-befor-192991598bc5aa541-5')}
          </a>
        </li>
        <li>
          <a href="#contact">
            {i18n.t('demoTest-test-jsx-befor-192991598bc5aa541-6')}
          </a>
        </li>
      </ul>
    </nav>
  </header>
);

Header.propTypes = {
  title: PropTypes.string.isRequired,
};

// 用户信息组件
const UserInfo = ({ user }) => (
  <div className="user-info">
    <h3>
      {user.name}
      {i18n.t('demoTest-test-jsx-befor-192991598bc5aa541-7')}
    </h3>
    <p>
      {i18n.t('demoTest-test-jsx-befor-192991598bc5aa541-8')}
      {user.age}
    </p>
    <p>
      {i18n.t('demoTest-test-jsx-befor-192991598bc5aa541-9')}
      {user.occupation}
    </p>
  </div>
);

// 计数器组件
const Counter = () => {
  const [count, setCount] = useState(0);

const increment = () => setCount((prevCount) => prevCount + 1);
  const decrement = () => setCount((prevCount) => prevCount - 1);

return (
    <div>
      <h3>{i18n.t('demoTest-test-jsx-befor-192991598bc5aa541-10')}</h3>
      <p>
        {i18n.t('demoTest-test-jsx-befor-192991598bc5aa541-11')}
        {count}
      </p>
      <button onClick={increment}>
        {i18n.t('demoTest-test-jsx-befor-192991598bc5aa541-12')}
      </button>
      <button onClick={decrement}>
        {i18n.t('demoTest-test-jsx-befor-192991598bc5aa541-13')}
      </button>
    </div>
  );
};

// 待办事项组件
const TodoList = () => {
  const [todos, setTodos] = useState([]);
  const [inputValue, setInputValue] = useState('');

const handleInputChange = (e) => setInputValue(e.target.value);

const toggleTodo = (id) => {
    setTodos(
      todos.map((todo) =>
        todo.id === id ? { ...todo, completed: !todo.completed } : todo,
      ),
    );
  };

return (
    <div>
      <h3>{i18n.t('demoTest-test-jsx-befor-192991598bc5aa541-14')}</h3>
      <form onSubmit={handleSubmit}>
        <input
          type="text"
          value={inputValue}
          onChange={handleInputChange}
          placeholder={i18n.t('demoTest-test-jsx-befor-192991598bc5aa541-15')}
        />

<button type="submit">
          {i18n.t('demoTest-test-jsx-befor-192991598bc5aa541-16')}
        </button>
      </form>
      <ul>
        {todos.map((todo) => (
          <li
            key={todo.id}
            onClick={() => toggleTodo(todo.id)}
            style={{ textDecoration: todo.completed ? 'line-through' : 'none' }}
          >
            {todo.text}
          </li>
        ))}
      </ul>
    </div>
  );
};

// 主应用组件
const App = () => {
  const [user, setUser] = useState(null);
  const [isLoading, setIsLoading] = useState(true);
  const [error, setError] = useState(null);

useEffect(() => {
    fetchUserData()
      .then((data) => {
        setUser(data);
        setIsLoading(false);
      })
      .catch((err) => {
        setError(i18n.t('demoTest-test-jsx-befor-192991598bc5aa541-17'));
        setIsLoading(false);
        console.error('获取用户数据失败:', err);
      });
  }, []);

const welcomeMessage = useMemo(() => {
    return user
      ? `${i18n.t('demoTest-test-jsx-befor-192991598bc5aa541-18')}${user.name}！`
      : i18n.t('demoTest-test-jsx-befor-192991598bc5aa541-19');
  }, [user]);

const handleError = useCallback(() => {
    throw new Error('这是一个故意抛出的错误');
  }, []);

if (isLoading)
    return <div>{i18n.t('demoTest-test-jsx-befor-192991598bc5aa541-20')}</div>;
  if (error)
    return (
      <div>
        {i18n.t('demoTest-test-jsx-befor-192991598bc5aa541-21')}
        {error}
      </div>
    );

return (
    <ErrorBoundary>
      <div className="app">
        <Header
          title={i18n.t('demoTest-test-jsx-befor-192991598bc5aa541-22')}
        />
        <main>
          <h2>{welcomeMessage}</h2>
          {user && <UserInfo user={user} />}
          <Counter />
          <TodoList />
          <button onClick={handleError}>
            {i18n.t('demoTest-test-jsx-befor-192991598bc5aa541-23')}
          </button>
        </main>
        <footer>
          <p>{i18n.t('demoTest-test-jsx-befor-192991598bc5aa541-24')}</p>
        </footer>
      </div>
    </ErrorBoundary>
  );
};

export default App;