How to prevent bubbling failure in react-JS Tutorial-php.cn

How to prevent bubbling failure in react

coldplay.xixi

Release： 2020-11-17 14:08:09

Original

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Methods for react to prevent bubbling failure: 1. When there is no native event registration and only react events are involved, use [e.stopPropagation()] to prevent bubbling; 2. You need to use [e.nativeEvent. stopImmediatePropagation()] method.

How to prevent bubbling failure in react

React's method to prevent bubbling failure:

1. Only react events are registered when there are no native events involved. When using e.stopPropagation() to stop bubbling, the code is as follows:

import React, { Component } from &#39;react&#39;;
import &#39;./App.css&#39;;
class App extends Component {
  handleClickTestBox = (e) => {
    console.warn(&#39;handleClickTestBox: &#39;, e);
  }
  handleClickTestBox2 = (e) => {
    console.warn(&#39;handleClickTestBox2: &#39;, e);
  }
  handleClickTestBox3 = (e) => {
    e.stopPropagation();
    console.warn(&#39;handleClickTestBox3: &#39;, e);
  }
  render() {
    return (
      <div
        className="test-box"
        onClick={this.handleClickTestBox}
      >
        <div
          onClick={this.handleClickTestBox2}
        >
          <div
            onClick={this.handleClickTestBox3}
          >
          </div>
        </div>
      </div>
    );
  }
}
export default App;

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2. After using document.addEventListener to register the native event, use e .stopPropagation() cannot prevent bubbling with the document. In this case, you need to use the e.nativeEvent.stopImmediatePropagation() method. The code is as follows:

import React, { Component } from &#39;react&#39;;
import &#39;./App.css&#39;;
class App extends Component {
  componentDidMount() {
    document.addEventListener(&#39;click&#39;, this.handleDocumentClick, false);
  }
  handleDocumentClick = (e) => {
    console.log(&#39;handleDocumentClick: &#39;, e);
  }
  handleClickTestBox = (e) => {
    console.warn(&#39;handleClickTestBox: &#39;, e);
  }
  handleClickTestBox2 = (e) => {
    console.warn(&#39;handleClickTestBox2: &#39;, e);
  }
  handleClickTestBox3 = (e) => {
    // 阻止合成事件的冒泡
    e.stopPropagation();
    // 阻止与原生事件的冒泡
    e.nativeEvent.stopImmediatePropagation();
    console.warn(&#39;handleClickTestBox3: &#39;, e);
  }
  render() {
    return (
      <div
        className="test-box"
        onClick={this.handleClickTestBox}
      >
        <div
          onClick={this.handleClickTestBox2}
        >
          <div
            onClick={this.handleClickTestBox3}
          >
          </div>
        </div>
      </div>
    );
  }
}
export default App;

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3. Prevent synthetic events For bubbling between non-synthetic events (except document), the above two methods are not applicable. e.target needs to be used to judge. The code is as follows:

import React, { Component } from &#39;react&#39;;
import &#39;./App.css&#39;;
class App extends Component {
  componentDidMount() {
    document.addEventListener(&#39;click&#39;, this.handleDocumentClick, false);
    document.body.addEventListener(&#39;click&#39;, this.handleBodyClick, false);
  }
  handleDocumentClick = (e) => {
    console.log(&#39;handleDocumentClick: &#39;, e);
  }
  handleBodyClick = (e) => {
    if (e.target && e.target === document.querySelector(&#39;#inner&#39;)) {
      return;
    }
    console.log(&#39;handleBodyClick: &#39;, e);
  }
  handleClickTestBox = (e) => {
    console.warn(&#39;handleClickTestBox: &#39;, e);
  }
  handleClickTestBox2 = (e) => {
    console.warn(&#39;handleClickTestBox2: &#39;, e);
  }
  handleClickTestBox3 = (e) => {
    // 阻止合成事件的冒泡
    e.stopPropagation();
    // 阻止与原生事件的冒泡
    e.nativeEvent.stopImmediatePropagation();
    console.warn(&#39;handleClickTestBox3: &#39;, e);
  }
  render() {
    return (
      <div
        className="test-box"
        onClick={this.handleClickTestBox}
      >
        <div
          onClick={this.handleClickTestBox2}
        >
          <div
            id="inner"
            onClick={this.handleClickTestBox3}
          >
          </div>
        </div>
      </div>
    );
  }
}
export default App;

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