Demo—cookie电商购物车

2018-06-24 01:29:14来源：未知阅读 ()

说明：cookie的操作须有域名，简单点说就是需要用发布的方式去访问，查看cookie信息请用开发者模式进入application栏

1.页面布局（结构）（根目录）

商品列表

<!doctype html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>商品列表</title>
    <link rel="stylesheet" type="text/css" href="styles/productList.css"/>
</head>
<body>
    <div class="listbox">    
        <a href="shoppingCart.html" class="mycart">我的购物车</a>
        <ul id="list" class="list">
            <li>
                <a href="javascript:;" class="abtn" data-id="1" data-url="images/1.jpg" data-title="8h 鹅绒被" data-price="199" data-amount="1">添加到购物车</a>
                <img src="images/1.jpg" alt="">
                <div class="title">8h 鹅绒被</div>
                <div class="price">￥998</div>
            </li>
            <li>
                <a href="javascript:;" class="abtn" data-id="2" data-url="images/2.jpg" data-title="8h 鹅绒被" data-price="199" data-amount="1">添加到购物车</a>
                <img src="images/2.jpg" alt="">
                <div class="title">8h 鹅绒被</div>
                <div class="price">￥998</div>
            </li>
            <li>
                <a href="javascript:;" class="abtn" data-id="3" data-url="images/3.jpg" data-title="8h 鹅绒被" data-price="199" data-amount="1">添加到购物车</a>
                <img src="images/3.jpg" alt="">
                <div class="title">8h 鹅绒被</div>
                <div class="price">￥998</div>
            </li>
            <li>
                <a href="javascript:;" class="abtn" data-id="4" data-url="images/4.jpg" data-title="8h 鹅绒被" data-price="199" data-amount="1">添加到购物车</a>
                <img src="images/4.jpg" alt="">
                <div class="title">8h 鹅绒被</div>
                <div class="price">￥998</div>
            </li>
            <li>
                <a href="javascript:;" class="abtn" data-id="5" data-url="images/5.jpg" data-title="8h 鹅绒被" data-price="199" data-amount="1">添加到购物车</a>
                <img src="images/5.jpg" alt="">
                <div class="title">8h 鹅绒被</div>
                <div class="price">￥998</div>
            </li>
            <li>
                <a href="javascript:;" class="abtn" data-id="6" data-url="images/6.jpg" data-title="8h 鹅绒被" data-price="199" data-amount="1">添加到购物车</a>
                <img src="images/6.jpg" alt="">
                <div class="title">8h 鹅绒被</div>
                <div class="price">￥998</div>
            </li>
            <li>
                <a href="javascript:;" class="abtn" data-id="7" data-url="images/7.jpg" data-title="8h 鹅绒被" data-price="199" data-amount="1">添加到购物车</a>
                <img src="images/7.jpg" alt="">
                <div class="title">8h 鹅绒被</div>
                <div class="price">￥998</div>
            </li>
            <li>
                <a href="javascript:;" class="abtn" data-id="8" data-url="images/8.jpg" data-title="8h 鹅绒被" data-price="199" data-amount="1">添加到购物车</a>
                <img src="images/8.jpg" alt="">
                <div class="title">8h 鹅绒被</div>
                <div class="price">￥998</div>
            </li>
        </ul>
    </div>
</body>
<script type="text/javascript" src="scripts/common.js"></script>
<script type="text/javascript" src="scripts/productList.js"></script>
</html>

productList.html

购物车商品页面

<!doctype html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>商品列表</title>
    <link rel="stylesheet" type="text/css" href="styles/productList.css"/>
</head>
<body>
    <div class="listbox">        
        <a href="productList.html" class="mycart">返回商品列表</a>
        <ul id="list" class="list">
        </ul>
    </div>
</body>
<script type="text/javascript" src="scripts/common.js"></script>
<script type="text/javascript" src="scripts/shoppingCart.js"></script>
</html>

shoppingCart.html

2.页面样式（样式）(文件夹名称：styles)

@charset "ntf-8";
/* css document */
/* 样式覆盖 */
html,body,form,table,th,tr,td,ul,li,ol,dl,dd,dt,p,h1,h2,h3,h4,h5,h6,fieldset,figure,hr,div{
    margin: 0;
    padding: 0;
}
html,body{
    height: 100%;
}
body{
    font-family: "Microsoft YaHei","Arial";
    font-size: 16px;
    background: #f3f3f3;
}

ul,ol{
    list-style: none;
}

img{
    border: none;
    display: block;
}

a{
    text-decoration: none;
}
/* listbox */
.listbox{
    width: 95%;
    margin: 0 auto;
    overflow:hidden; 
    text-align: center;
}
.mycart{
    display: inline-block;
    padding: 10px 50px;
    border: 10px solid #f3f3f3;
    font-weight: bold;
    font-size: 18px;
    color: #000000;
    background: #e33333;
}
.list li{
    width: 25%;
    background: #ffffff;
    float: left;
    min-height: 100px;
    _height:100px;
    box-sizing: border-box;
    border: 10px solid #f3f3f3;
    text-align: center;
    border-radius: 10px;
}
.list li img{
    width: 100%;
}
.list li .abtn{
    width: 100%;
    height: 50px;
    display: inline-block;
    background: #e33333;
    font-weight: bold;
    line-height: 50px;
    text-decoration: none;
    color:#000000;
    cursor: pointer;
    letter-spacing: 8px;
}
.list li .title{
    line-height: 40px;
    
}
.list li .price{
    line-height: 40px;
    color: #e33333;
    font-size: 18px;
}

productList.css

3.脚本文件（行为）(文件夹名称:scripts)

封装函数及公用的方法

/*封装的公用函数—开始*/
function $(id) {
    return document.getElementById(id);
}
function getTagByClassName(sClassName) {
    if (document.getElementsByClassName) {
        return document.getElementsByClassName(sClassName);
    }
    else
    {
        var allTags=document.getElementsByTagName("*");
        var tag=[];
        for (var i = 0; i < allTag.length; i++) {
            if (allTags[i].className==sClassName) {
                tag.push(allTags[i]);
            }
        }
        return tag;
    }
}
/*封装的公用函数—完毕*/

//增加或修改cookie
function setCookie(name,value,days,path){
    days=days||0;
    path=path||'/';
    var oDate=new Date();
    oDate.setDate(oDate.getDate()+days);
    document.cookie = name + '=' + encodeURIComponent(value) + ';expires=' + oDate +';path=' + path;
}
// 获取cookie
function getCookie(name) {
    var aCookie = document.cookie.split('; ');
    for(var i = 0; i < aCookie.length; i++) {
        var temp = aCookie[i].split('=');

        if(temp[0] === name) {
            return decodeURIComponent(temp[1]);
        }
    }
}

common.js

关于商品列表的脚本

/*网页加载完成后执行的事件*/
window.onload=function() {
    var oAbtn=getTagByClassName("abtn");
    for (var i = 0; i < oAbtn.length; i++) {
        oAbtn[i].onclick=function() {
            var goodId=this.getAttribute('data-id');
            var goodSrc=this.getAttribute('data-url');
            var goodTitle=this.getAttribute('data-title');
            var goodPrice=this.getAttribute('data-price');
            var goodAmount=this.getAttribute('data-amount');
            //创建货物对象并赋值
            var oGood={
                id:goodId,
                src:goodSrc,
                title:goodTitle,
                price:goodPrice,
                amount:goodAmount
            };
            //读取内存中的cookie信息
            var sGoodlist=getCookie("aGoodList")
            //获取货物数组，如果货物数组存在则在此基础上进行修改数据，不存在则创建新的数组存储货物对象
            var aGoodList=sGoodlist?JSON.parse(sGoodlist):[];
            //判断是否存在将要添加到购物车的货物
            var whetherExsits=aGoodList.every(function(v) {
                if (v.id===oGood.id) {
                    //存在修改购物车的货物数量
                    v.amount++;
                    return false;
                }
                return true;
            });
            //不存在则将货物对象追加到数组
            if (whetherExsits) {
                aGoodList.push(oGood);
            }
            setCookie("aGoodList",JSON.stringify(aGoodList),7);
        }
    }
}

productList.js

关于购物车的脚本

window.onload=function() {

    var sGoodlist=getCookie("aGoodList");
    var aGoodList=sGoodlist?JSON.parse(sGoodlist):[];
    for (var i = 0; i < aGoodList.length; i++) {
        var oLi=document.createElement('li');    
        oLi.innerHTML='<a href="javascript:;" class="abtn" data-id="'+aGoodList[i].id+'">删除该商品</a><img src="'+aGoodList[i].src+'" /><div class="title">'+aGoodList[i].title+'</div><div class="price">￥'+aGoodList[i].price+'/个|数量'+aGoodList[i].amount+'</div>';
        $("list").appendChild(oLi);
        var oAbtn=getTagByClassName("abtn");
        oAbtn[i].index=i;
        oAbtn[i].onclick=function() {
            //商品数量没删除一次减一件
            if (aGoodList[this.index].amount>1) {
                aGoodList[this.index].amount--
            }
            else
            {
                //剩余一件商品删除该对象
                $("list").removeChild(this.parentNode);
                aGoodList.splice(this.index,1)//掌握splice的应用
            }
            //将最新商品保存到cookie
            setCookie("aGoodList",JSON.stringify(aGoodList),7);
            window.location.reload();
        } 
    }
}