a标签下载文件

var eleLink = document.createElement("a");
eleLink.download = "data.xlsx";
eleLink.style.display = "none";
eleLink.href = ’http://127.0.0.1:download_url‘
// 触发点击
document.body.appendChild(eleLink);
eleLink.click();
// 然后移除
document.body.removeChild(eleLink);