将文本复制至剪贴板

<el-button @click="clickCopy">
              复制Url
</el-button>

clickCopy() {
      const aux = document.createElement('input')
      aux.setAttribute('value',copyText)
      document.body.appendChild(aux)
      aux.select()
      document.execCommand('copy')
      document.body.removeChild(aux)
      if (document.execCommand('copy')) {
        this.$message.success('复制成功')
      } else {
        this.$message.error('复制失败')
      }
    },