var fnClick = function(){};
var a = document.getElementById("b");
if (a.addEventListener) {
a.addEventListener("click", fnClick, true);
} else if (a.attachEvent) {
a.attachEvent("onclick", fnClick);
}

var xhr = null;
if(window.XMLHttpRequest){
xhr = new XMLHttpRequest();
}else {
xhr = new ActiveXObject("microsoft.XMLHTTP");
}
xhr.open("GET","url",true);
xhr.onreadystatechange = function(){};
xhr.send(null);

http://www.zhangxinxu.com/wordpress/2015/01/css-page-scrollbar-toggle-center-no-jumping/

https://zhuanlan.zhihu.com/p/20495964
css在react的模块化

www.qdaily.com/mobile/articles/27306.html

http://182.139.168.209:10800/pc/index.html

https://www.zhihu.com/question/22646257/answer/22113651

http://182.139.169.58:10800/