React a key copy

　　If that, how we achieve React or other framework a key copy of it, in fact, achieved a key code has nothing to do with the frame copy, because he is a native API, we use the following React to achieve it

　 effect:

　　Core code:

　　　　Directly to the red box changed the class name you want to copy elements. (Note that when retrieving an element what I use querySelector)

　　　　The event bound to the elements, you can. The complete code in the bottom

　　Complete code:

　　　　Note: Icon and message are those derived from antd component library, should not installed antd, other elements can be changed

import React from 'react';
import './App.css';
import {Icon, message} from 'antd';
class App extends React.Component{
      //一键复制功能
    copy() {
      const copyEle = document.querySelector('.contentText') // 获取要复制的节点
      const range = document.createRange(); // 创造range
      window.getSelection().removeAllRanges(); //清除页面中已有的selection
      range.selectNode(copyEle); // 选中需要复制的节点
      window.getSelection().addRange(range); // 执行选中元素
      const copyStatus = document.execCommand("Copy"); // 执行copy操作
      // 对成功与否定进行提示
      if (copyStatus) {
        message.success('复制成功');
      } else {
        message.fail('复制失败');
      }
      window.getSelection().removeAllRanges(); //清除页面中已有的selection
    }
  render() {
    return (
      <div className="App">
        <div className="content">
          <p className="contentTitle">
            <Icon 
              type="copy" 
              onClick={this.copy}/>
          </p>
          <p className="contentText">
            我是要被复制的内容啊！！！
          </p>
        </div>
      </div>
    );
  }
}

export default App;

　　原理：

　　我们来看一下具体的步骤：（具体API使用可以查阅MDN）

　　1. document.querySelector('.contentText') 获取需要复制的节点

　　2. document.createRange(); 创造一个区域

　　3. window.getSelection().removeAllRanges(); 将所有选区都清除(即被按住鼠标划中选择的部分)

　　4. range.selectNode(copyEle)；选中区域要包含的对象

　　5. document.execCommand("Copy"); execCommand方法允许运行命令来操纵可编辑内容区域的元素。

　　6.判断成功与否

　　7.window.getSelection().removeAllRanges(); 将所有选区都清除(即被按住鼠标划中选择的部分)

通过以上的步骤，一键复制就做好啦！！

Guess you like