How to implement copy function in vuejs
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.
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
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;
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]); }); }, };
import Vue from 'vue'; import Directives from './directives'; Vue.use(Directives);
<template> <div > <button v-copy="copyText">拷贝</button> </div> </template> <script> export default { data(){ return { copyText:'要copy的内容' } }, methods: { init () { }, }, watch: {}, props: [], components: {}, computed: {}, mounted () { _this = this; _this.init(); }, } </script>
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