vue 通用下载视频

let url = data.wljyVideo.videoPath; //下载的文件URL
      // let fileName = url.slice(url.lastIndexOf("/") + 1); //下载的文件名换成自己的
      let fileName = data.wljyVideo.videoName; //下载的文件名字
      var xhr = new XMLHttpRequest();
      xhr.open("GET", url, true);
      xhr.responseType = "blob"; // 返回类型blob
      xhr.onload = () => {
        if (xhr.readyState === 4 && xhr.status === 200) {
          let blob = xhr.response;
          let downLoadUrl = window.URL.createObjectURL(
            new Blob([blob], {
              // type: item.type === "video" ? "video/mp4" : "image/jpeg",
              type: "video/mp4", //这里限制了视频，上面的可以放开限制下载图片
            })
          );
          let a = document.createElement("a");
          a.download = fileName;
          a.href = downLoadUrl;
          a.style.display = "none";
          document.body.appendChild(a);
          a.click();
          a.remove();
        }
      };
      xhr.send();