下半年记忆的博客

策略模式 js demo模拟场景为表单效验var strategys = { //效验规则集合 isNonEmpty: function (value,errMsg) { if(value === "" || value == null) return errMsg; }, minLength: function (value,length,errMsg) { if(typeof length == "string"){

订阅模式Demo(Js)var Event = (function () { var clientList = {}, listen, trigger, remove; listen = function (key,fn) { if(!clientList[key]){ clientList[key] = []; } clientList[key].push(fn); }

职责链模式Demo3种订单：orderType = 1：500元定金预购，得到100元优惠券（stock代表库存，pay代表是否付款）var order500 = function (orderType,pay,stock) { if(orderType === 1 && pay === true){ console.log("500元定金预购，得到100元优惠券"); }else{ return "nextSuccessor";