须将axios 配置中的responseType设置为arraybuffer

 

text/comma-separated-values,  
text/csv,  
application/csv, 
application/excel, 
application/vnd.ms-excel, 
application/vnd.msexcel

// 下载文件
async exportConsumeList() {
  try {
	let res = await exportConsumeList()
	var blob = new Blob([res], {
	  type: 'text/csv,charset=UTF-8',
	})
	if ('download' in document.createElement('a')){
	// 非IE下载
		var downloadElement = document.createElement('a')
		var href = window.URL.createObjectURL(blob) //创建下载的链接
		downloadElement.href = href
		downloadElement.download = '用户数据.csv' //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
	}else {
		// IE10+下载
		navigator.msSaveBlob(blob, fileName);
	}
  } catch (error) {
	console.log(error)
  }
},