componentWillUnmount上的超时未清除

class MyComponent extends React.Component {
  constructor(props) {
    super(props);
    this.timeoutId = null;
  }

  componentDidMount() {
    this.timeoutId = setTimeout(() => {
      // 超时操作逻辑
    }, 1000);
  }

  componentWillUnmount() {
    clearTimeout(this.timeoutId);
  }

  render() {
    // 组件渲染逻辑
  }
}

class MyComponent extends React.Component {
  constructor(props) {
    super(props);
    this.intervalId = null;
  }

  componentDidMount() {
    this.intervalId = setInterval(() => {
      // 定时操作逻辑
    }, 1000);
  }

  componentWillUnmount() {
    clearInterval(this.intervalId);
  }

  render() {
    // 组件渲染逻辑
  }
}