[笔记] 在浏览器端用JS创建和下载文件

function downloadFile(fileName, content){
    var aLink = document.createElement('a');
    var blob = new Blob([content]);
    var evt = document.createEvent("HTMLEvents");
    evt.initEvent("click", false, false);//initEvent 不加后两个参数在FF下会报错, 感谢 Barret Lee 的反馈
    aLink.download = fileName;
    aLink.href = URL.createObjectURL(blob);
    aLink.dispatchEvent(evt);
}

reference: http://www.alloyteam.com/2014/01/use-js-file-download/