vue 兼容ie 下载文件

 handlePreview(file) {
      getFile(file.id)
        .then(res => {
          const blob = new Blob([res]);
          if (window.navigator.msSaveOrOpenBlob) {
            // 兼容IE
            navigator.msSaveBlob(blob, file.name);
          } else {
            var a = document.createElement("a");
            var event = new MouseEvent("click");
            a.download = file.name;
            a.href = window.URL.createObjectURL(blob);

            a.dispatchEvent(event);
          }
        })
        .catch(err => {
          console.log("err", err);
        });
    }

import request from '@/utils/request'

// 请求的返回类型需要为blob否则导出会有问题
export function exportFun1() {
    return request({
        url: '/asset/exportLease',
        responseType: "blob",
        method: 'get'
    })
}

方法二
export function downloadFile(obj, name, suffix) {
//obj是后端返回的流
//name是导出文件的名字
//suffix是文件后缀

  if (window.navigator.msSaveOrOpenBlob) {
    // 兼容IE
    const blob = new Blob([obj]);

    const fileName = parseTime(new Date()) + '-' + name + '.' + suffix
    navigator.msSaveBlob(blob, fileName);
  } else {

    const url = window.URL.createObjectURL(new Blob([obj]))
    const element = document.createElement('a')
    element.style.display = 'none'
    element.href = url
    const fileName = parseTime(new Date()) + '-' + name + '.' + suffix
    element.setAttribute('download', fileName)
    document.body.appendChild(element)
    element.click()
    document.body.removeChild(element)
  }

}