js实现pdf、excel文件无预览直接下载

          // pdf、xlsx或其他文件无预览下载
          const url = '你的文件url链接'
          let fileName = url.substring(url.lastIndexOf('/') + 1)
          console.log("fileName--",fileName)
          let isPdf = url.endsWith('.pdf')
          const request = new XMLHttpRequest();
          request.responseType = 'blob';
          request.open('GET', res.data.url);
          request.onload = function () {
            const link = document.createElement('a');
            document.body.appendChild(link);
            this.response.arrayBuffer().then(buf => {
              const blob = new Blob([buf]);
              const url = URL.createObjectURL(blob);
              link.style.display = 'none';
              link.target = '_blank';
              link.download = fileName;
              link.href = url;
              link.click();
              document.body.removeChild(link);
              window.URL.revokeObjectURL(url);
            });
          };
          request.send();