js工具函数

checkVersion.js(检查浏览器类型)
function checkVersion(){
 ???var u = navigator.userAgent, app = navigator.appVersion;
 ???return {
 ?????trident: u.indexOf(‘Trident‘) > -1, //IE内核
 ?????presto: u.indexOf(‘Presto‘) > -1, //opera内核
 ?????webKit: u.indexOf(‘AppleWebKit‘) > -1, //苹果、谷歌内核
 ?????gecko: u.indexOf(‘Gecko‘) > -1 && u.indexOf(‘KHTML‘) == -1,//火狐内核
 ?????mobile: !!u.match(/AppleWebKit.*Mobile.*/), //是否为移动终端
 ?????ios: !!u.match(/\(i[^;]+;( U;)? CPU.+Mac OS X/), //ios终端
 ?????android: u.indexOf(‘Android‘) > -1 || u.indexOf(‘Adr‘) > -1, //android终端
 ?????iPhone: u.indexOf(‘iPhone‘) > -1 , //是否为iPhone或者QQHD浏览器
 ?????iPad: u.indexOf(‘iPad‘) > -1, //是否iPad
 ?????webApp: u.indexOf(‘Safari‘) == -1, //是否web应该程序，没有头部与底部
 ?????weixin: u.indexOf(‘MicroMessenger‘) > -1, //是否微信
 ?????qq: u.match(/\sQQ/i) == " qq", //是否QQ
 ?????app: u.indexOf(‘tiantianApp‘) > -1 //是否在app内
 ???};
 ?}
 ?function allUrl(){
 ???return ‘https://www.tiantianyuyin.com‘;
 ?} 


rem750.js　(ren布局)

var layout_width = 750;
(function(doc, win) {
 ???var docEl = doc.documentElement,
 ???????resizeEvt = ‘orientationchange‘ in window ? ‘orientationchange‘ : ‘resize‘,
 ???????recalc = function() {
 ???????????var clientWidth = docEl.clientWidth;
 ???????????if (!clientWidth) return;
 ???????????if (clientWidth >= layout_width) {
 ???????????????docEl.style.fontSize = ‘100px‘;
 ???????????} else {
 ???????????????docEl.style.fontSize = 100 * (clientWidth / layout_width) + ‘px‘;
 ???????????}
 ???????};

 ???if (!doc.addEventListener) return;
 ???win.addEventListener(resizeEvt, recalc, false);
 ???doc.addEventListener(‘DOMContentLoaded‘, recalc, false);
})(document, window);

js工具函数

原文地址：https://www.cnblogs.com/geekjsp/p/9699248.html