项目中使用自定义指令实现一个复制的功能,点击按钮复制一个变量到粘贴板

NBNBNBNB js 大法好

 

 本人最近写博客越来越随便了，能看懂就看懂，看不懂就去别处。

摘抄自  vue-element-admin

 

 

clipboard.js

import Clipboard from './clipboard'

const install = function(Vue) {
  Vue.directive('Clipboard', Clipboard)
}

if (window.Vue) {
  window.clipboard = Clipboard
  Vue.use(install); // eslint-disable-line
}

Clipboard.install = install
export default Clipboard

 

index.js

// Inspired by https://github.com/Inndy/vue-clipboard2
const Clipboard = require('clipboard')
if (!Clipboard) {
  throw new Error('you should npm install `clipboard` --save at first ')
}

export default {
  bind(el, binding) {
    if (binding.arg === 'success') {
      el._v_clipboard_success = binding.value
    } else if (binding.arg === 'error') {
      el._v_clipboard_error = binding.value
    } else {
      const clipboard = new Clipboard(el, {
        text() {
          return binding.value
        },
        action() {
          return binding.arg === 'cut' ? 'cut' : 'copy'
        },
      })
      clipboard.on('success', e => {
        const callback = el._v_clipboard_success
        callback && callback(e) // eslint-disable-line
      })
      clipboard.on('error', e => {
        const callback = el._v_clipboard_error
        callback && callback(e) // eslint-disable-line
      })
      el._v_clipboard = clipboard
    }
  },
  update(el, binding) {
    if (binding.arg === 'success') {
      el._v_clipboard_success = binding.value
    } else if (binding.arg === 'error') {
      el._v_clipboard_error = binding.value
    } else {
      el._v_clipboard.text = function() {
        return binding.value
      }
      el._v_clipboard.action = function() {
        return binding.arg === 'cut' ? 'cut' : 'copy'
      }
    }
  },
  unbind(el, binding) {
    if (binding.arg === 'success') {
      delete el._v_clipboard_success
    } else if (binding.arg === 'error') {
      delete el._v_clipboard_error
    } else {
      el._v_clipboard.destroy()
      delete el._v_clipboard
    }
  },
}

 

用法组件代码

 

 <el-button v-clipboard:copy="searchForm.keyword" v-clipboard:success="clipboardSuccess"      type="primary" icon="el-icon-document"> copy </el-button>

import clipboard from '@/directive/clipboard/index.js' // use clipboard by v-directive


  directives: {
    clipboard,
  },