<template>
 <div class="container">
  <input type="text" v-model="message">
  <button type="button"
      v-clipboard:copy="message"
      v-clipboard:success="onCopy"
      v-clipboard:error="onError">Copy!</button>
 </div>
</template>
<script>
 export default {
  data() {
   return {
    message: 'Copy These Text',
   }
  },
  methods: {
   onCopy: function (e) {
    alert('You just copied: ' + e.text)
   },
   onError: function (e) {
    console.log(e)
    alert('Failed to copy texts')
   }
  }
 }
</script>

<template>
 <div class="container">
  <input type="text" v-model="message">
  <button type="button" @click="doCopy('add me!')">Copy!</button>
 </div>
</template>
<script>
 export default {
  data() {
   return {
    message: 'Copy These Text'
   }
  },
  methods: {
   dataProcessing (val) {
    this.message = this.message + ' ' + val
   },
   doCopy: function (val) {
    this.dataProcessing(val)
    this.$copyText(this.message).then(function (e) {
     alert('Copied')
     console.log(e)
    }, function (e) {
     alert('Can not copy')
     console.log(e)
    })
   }
  }
 }
</script>

import VueClipboard from 'vue-clipboard2'
Vue.use(VueClipboard)

<ul class="file-list">
 <li v-for="(f, index) of files" :key="index">
 <span>[文件{{index + 1}}] {{f}}</span>
 <span class="copy-btn" v-clipboard:copy="f" v-clipboard:success="onCopy" v-clipboard:error="onError">复制</span>
 </li>
</ul>
// 复制成功时的回调函数
onCopy (e) {
 this.$message.success("内容已复制到剪切板！")
},
// 复制失败时的回调函数
onError (e) {
 this.$message.error("抱歉，复制失败！")
}