文件下载的ie11兼容性优化

 1  /**
 2      * 导出用户列表
 3      */
 4     private exportUsers(){
 5         this.http.doPost({
 6             url: ‘system/sysmanager/user/exportUsers‘,
 7             responseType:ResponseContentType.Blob,
 8             body:this.form,
 9             success: (req, res) => {
10                 if(window.navigator.msSaveOrOpenBlob){
11                     // 兼容ie11
12                     try{
13                         var blobObject = new Blob([res.json()]); 
14                         window.navigator.msSaveOrOpenBlob(blobObject, "用户列表.xlsx"); 
15                     }
16                     catch(e){
17                         console.log(e);
18                     }
19                 }
20                 else{
21                     var blob = new Blob([res.json()]); 
22                     var a = document.createElement(‘a‘);
23                     a.href = URL.createObjectURL(blob); // xhr.response is a blob
24                     a.download = "用户列表.xlsx";
25                     a.style.display = ‘none‘;
26                     document.body.appendChild(a);
27                     a.click();
28                     a.remove();
29                 }
30             }
31         });
32    }