js原生方法 document.execCommand实现复制

copyText(text) {

      var textarea = document.createElement("input"); //创建input对象

      var currentFocus = document.activeElement; //当前获得焦点的元素

      document.body.appendChild(textarea); //添加元素

      textarea.value = text;

      textarea.focus();

      if (textarea.setSelectionRange)

        textarea.setSelectionRange(0, textarea.value.length);

      //获取光标起始位置到结束位置

      else textarea.select();

      try {

        var flag = document.execCommand("copy"); //执行复制

      } catch (eo) {

        var flag = false;

      }

      document.body.removeChild(textarea); //删除元素

      currentFocus.focus();

      return flag;

    },

handleCopyClick(address, officialAccountId) {
      this.$api.createEAHome.gethomEnvHtml().then(res => {
        console.log("gethomEnvHtml", res);
        let str1 = res.data.resMsg;
        let str2 =
          "/#/posterCenter?channelid=" +
          officialAccountId +
          "&address=" +
          address;
        let str = str1 + str2;
        let flag = this.copyText(str); //传递文本
        this.$message({
          type: flag ? "success" : "error",
          message: flag ? "复制成功！" : "复制失败！"
        });
      });
    },

方法2：vue中使用vue-clipboard2

安装： 

npm install --save vue-clipboard2
main.js里面导入并使用：

import VueClipboard from "vue-clipboard2";
Vue.use(VueClipboard);

<template>
　　<el-button
       v-clipboard:copy=' urlHeader+ scope.row.officialAccountId + "&address=" + scope.row.address '
       v-clipboard:success="onCopy"
       v-clipboard:error="onError"
       type="primary"
       size="small"
       >复制链接</el-button
          >
</template>

props: {   
    urlHeader: {
      type: String,
      default: () => ""
    }
  },

使用组件：

<pagelistManage
      :urlHeader="urlHeader"
      v-if="urlHeader.length > 0"
    ></pagelistManage>

getCopyUrl() {
      console.log("getCopyUrl")
      this.$api.createEAHome.gethomEnvHtml().then(res => {
        console.log("gethomEnvHtml", res);
        if(res.status == "200"){
           this.urlHeader =  res.data.resMsg + '/#/signing?channelid= ';
        }else{
          this.$message(res.data.resMsg)
        }
      });
    },

onCopy() {

      this.$message("复制成功");

    },

onError() {

    this.$message("复制失败");

  },