js实现一键复制功能

        主要用于解决例如一键复制获取当前工单详细信息等

        代码如下：

 const orderDataCopy = () => {
      let val = orderNumberData.data.Model;
      let copyVal =
        "下单厂商：" +
        val.FactoryName +
        "\n" +
        "工单号：" +
        val.OrderNumber +
        "\n" +
        (val.Requirements || "暂无");
      new Promise((resolve) => {
        //如果复制单行，用input
        //如果复制多行，用textarea
        //创建一个textarea框获取需要复制的文本内容
        const copyUrl = document.createElement("textarea");
        copyUrl.value = copyVal;
        const appDiv = document.getElementById("app");
        appDiv.appendChild(copyUrl);
        copyUrl.select();
        document.execCommand("Copy");
        copyUrl.remove();
        resolve(true);
        ElMessage({
          message: "复制成功",
          type: "success",
        });
      });
    };