1、引入filesaver.js插件；
2、JS:
方法一：var file = new File(["欢迎访问 hangge.com"], "文件导出测试.txt", {type: "text/plain;charset=utf-8"});
saveAs(file);
方法二：
var
blob =
new
Blob([
"欢迎访问 hangge.com"
], {type:
"text/plain;charset=utf-8"
});
saveAs(blob,
"文件导出测试.txt"
);