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How to implement copy function in vuejs

藏色散人
藏色散人Original
2021-11-02 14:03:403145browse

How vuejs implements the copy function: 1. Create a copyComm.js file; 2. Create a directives.js file to register all global instructions; 3. Pass "return{copyText:'... '}" can be copied.

How to implement copy function in vuejs

The operating environment of this article: windows7 system, vue2.9.6 version, DELL G3 computer.

How to implement the copy function in vuejs?

vue.js implements one-click copy function

How to implement copy function in vuejs

##1, first create a copyComm.js file

const vCopy = { // 名字爱取啥取啥
  /*
    bind 钩子函数,第一次绑定时调用,可以在这里做初始化设置
    el: 作用的 dom 对象
    value: 传给指令的值,也就是我们要 copy 的值
  */
  bind(el, { value }) {
    el.$value = value; // 用一个全局属性来存传进来的值,因为这个值在别的钩子函数里还会用到
    el.handler = () => {
      if (!el.$value) {
        // 值为空的时候,给出提示,我这里的提示是用的 ant-design-vue 的提示,你们随意
       console.log('无复制内容');
        return;
      }
      // 动态创建 textarea 标签
      const textarea = document.createElement('textarea');
      // 将该 textarea 设为 readonly 防止 iOS 下自动唤起键盘,同时将 textarea 移出可视区域
      textarea.readOnly = 'readonly';
      textarea.style.position = 'absolute';
      textarea.style.left = '-9999px';
      // 将要 copy 的值赋给 textarea 标签的 value 属性
      textarea.value = el.$value;
      // 将 textarea 插入到 body 中
      document.body.appendChild(textarea);
      // 选中值并复制
      textarea.select();
      textarea.setSelectionRange(0, textarea.value.length);
      const result = document.execCommand('Copy');
      if (result) {
        console.log('复制成功');
      }
      document.body.removeChild(textarea);
    };
    // 绑定点击事件,就是所谓的一键 copy 啦
    el.addEventListener('click', el.handler);
  },
  // 当传进来的值更新的时候触发
  componentUpdated(el, { value }) {
    el.$value = value;
  },
  // 指令与元素解绑的时候,移除事件绑定
  unbind(el) {
    el.removeEventListener('click', el.handler);
  },
};
export default vCopy;

2, creating a directives.js file to register all global instructions

import copy from './copyComm.js';
// 自定义指令
const directives = {
  copy,
};
// 这种写法可以批量注册指令
export default {
  install(Vue) {
    Object.keys(directives).forEach((key) => {
      Vue.directive(key, directives[key]);
    });
  },
};

3, registering

import Vue from 'vue';
import Directives from './directives';
Vue.use(Directives);

4 in main.js, using vue files

<template>
  <div >
    <button v-copy="copyText">拷贝</button>
  </div>
</template>
<script>
  export default {
    data(){
      return {
        copyText:&#39;要copy的内容&#39;
      }
    },
    methods: {
      init () {
      },
    },
    watch: {},
    props: [],
    components: {},
    computed: {},
    mounted () {
      _this = this;
      _this.init();
    },
  }
</script>

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