res的形式
let a = document.createElement("a")
let blob = new Blob([res], {
type: "application/vnd.ms-excel", //將會被放入到blob中的數組內容的MIME類型
})
let objectUrl = URL.createObjectURL(blob) //生成一個url
a.setAttribute("href", objectUrl)
a.setAttribute("download", "盤點模板.xls")
a.click()