火狐浏览器点击下载文件

var blob = new Blob([data])
 var downloadElement = document.createElement('a');
 // var downloadElement = document.getElementById('download')
 var href = window.URL.createObjectURL(blob); //创建下载的链接
 downloadElement.href = href;
 downloadElement.download = '用户数据.xlsx'; //下载后文件名
 document.body.appendChild(downloadElement);
 downloadElement.click(); //点击下载
 document.body.removeChild(downloadElement); //下载完成移除元素
 window.URL.revokeObjectURL(href); //释放掉blob对象