JS兼容浏览器的导出Excel（CSV）文件的方法

var str = "博客, 域名/nBlog, 2/nVeVB.COm, 3";
var uri = 'data:text/csv;charset=utf-8,' + str;

var downloadLink = document.createElement("a");
downloadLink.href = uri;
downloadLink.download = "export.csv";

document.body.appendChild(downloadLink);
downloadLink.click();
document.body.removeChild(downloadLink);