剪贴板功能的实现

 1 import React, { Component } from ‘react‘
 2 
 3 import clipboard from "clipboard-polyfill"
 4 import {Button} from "antd"
 5 
 6 export default class Main extends Component {
 7     constructor(props){
 8         super(props);
 9         this.state={
10             opj:{
11                 "param.code.name":"姓名",
12                 "param.codexname":"昵称",
13                 "param.code.age":"年龄",
14                 "param.code.gender":"性别",
15                 "param.code.hobby":"爱好",
16             },
17             val:"大家好这是新来的同学，叫 ，也可以叫，今年了，喜欢，也喜欢",
18             changeVal:""
19         }
20     }
21     render() {
22         //console.log(Object.entries(this.state))
23         return (
24             <div>
25                 <div className="top">
26                     {Object.entries(this.state.opj).map((item,index)=>{
27                         return <Button  className="btn" key={index} onClick={this.copy.bind(this,index,item)}>{item[1]}</Button>
28                     })}
29                 </div>
30                 <textarea name="" id="text" ref="text" onPaste={this.paste.bind(this)} cols="30" rows="10" value={this.state.val} onChange={(e)=>{
31                     this.setState({
32                         val:e.target.value
33                     })
34                 }} />
35                 <button onClick={this.del.bind(this)}>去除value</button>
36                 <button onClick={this.add.bind(this)}>补充value</button>
37             </div>
38         )
39     }
40     copy(index,item){
41         //document.execCommand("Copy"); // 执行浏览器复制命令
42         // let btn=document.querySelectorAll(".btn")[index]
43         // btn.value=`[${item[1]}(${item[0]})]`
44         // btn.select()
45         // console.log(document.execCommand("Copy"))
46         // btn.value=item[1]
47         
48         let text=`[${item[1]}(${item[0]})]`;
49         //将文字复制到剪贴板
50         clipboard.writeText(text)
51         //console.log(text);
52     }
53     del(){
54         let str=this.state.val;
55         str=str.replace("]","")
56         let res=/\[.*?\(/g;
57         str=str.replace(res,"(")
58         //console.log(str);
59         this.setState({
60             val:str
61         })
62     }
63     add(){
64         let str=this.state.val;
65             if(str.indexOf("]")<0){
66                 console.log(111)
67                 str=str.replace(/\((.+?)\)/g,  ($0,$1,$2)=> {
68                     console.log($0,$1,$2,"============");
69                     return `[${this.state.opj[$1]}${$0}]`
70                   });
71                   console.log(str)
72                   this.setState({
73                     val:str
74                   })
75             }
76        
77     }
78     //粘贴触发的时间
79     paste(){
80         //--------
81         this.setState({
82             changeVal:this.state.val
83         })
84         
85     }
86 }