Question

我的渲染功能中有onScroll个事件。当滚动网站时，它应该触发listenScrollEvent函数，该函数输出一些数据。出于某种原因，它不会被触发。我已经在构造函数中绑定了该函数，但显然它没有帮助。

工作示例

import React, {Component} from 'react';
import { render } from 'react-dom';
import Hello from './Hello';

export class Home extends Component {
    constructor(props) {
      super();
          this.listenScrollEvent = this.listenScrollEvent.bind(this);

  }
    listenScrollEvent() {
    console.log('Scroll event detected!');
  }
    render() {
    return (
      <div className="App"  onScroll={this.listenScrollEvent}>

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      </div>
    );

  }
}

render(<Home />, document.getElementById('root'));

提前致谢！

Answer 1

通过添加：

修复了我的问题

  componentDidMount() {
    window.addEventListener('scroll', this.listenScrollEvent);
  }
  componentWillUnmount() {
    window.removeEventListener('scroll', this.listenScrollEvent);
  }

Answer 2

这对我有用，

componentDidMount() {
  window.addEventListener('scroll', this.listenScrollEvent,true);
}

引用：https://github.com/facebook/react/issues/5042#issuecomment-359478860

React / ES6 onScroll事件未被触发

2 个答案: