web前端入门到实战：仿美团详情页与购物车源码-详情页

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程序员阿宇
    阅读 20 分钟

    项目图

    首先是menu.html

    
<!DOCTYPE html>
<html>
<head>
    <title>深圳麦当劳前海二餐厅</title>
    <meta charset="utf-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0,maximum-scale=1.0,user-scalable=0">
    <script type="text/javascript"> (function () { var docEl = document.documentElement; function setRemUnit(){ // 获取到rem的基准值
                var rem = docEl.clientWidth / 10; // 动态设置html根元素的font-size
 docEl.style.fontSize = rem + 'px';
            }
            setRemUnit(); // 窗口大小变化时 触发
 window.addEventListener('resize', setRemUnit); // 窗口出现在当前屏幕时 （有浏览器兼容性）
 window.addEventListener('pageshow', function(e){ if (e.persisted) {
                    setRemUnit();
                }
            });
        })(); </script>
    <link rel="stylesheet" type="text/css" href="../lib/reset.css">
    <link rel="stylesheet" type="text/css" href="../common/navheader/navheader.css">
    <link rel="stylesheet" type="text/css" href="../common/headerTab/headerTab.css">
    <link rel="stylesheet" type="text/css" href="./left/left.css">
    <link rel="stylesheet" type="text/css" href="./right/right.css">
    <link rel="stylesheet" type="text/css" href="./shopBar/shopBar.css">
</head>
<body>
    <!--头部开始-->
    <div class="nav">
        <div class="back-icon"></div>
        <h4 class="title">深圳麦当劳前海二餐厅</h4>
    </div>
    <!--头部结束-->
    <!--tabbar开始-->
    <div class="tab-bar">
    </div>
    <!--tabbar结束-->
    <!--点菜内容区开始-->
    <div class="menu-inner">
        <div class="left-bar">
            <div class="left-bar-inner"></div>
        </div>
        <div class="right-content">
            <p class="right-title"></p>
            <div class="right-list">
                <div class="right-list-inner"></div>
            </div>
        </div>
        <!--购物车区域开始-->
        <div class="shop-bar"></div>
        <div class="mask hide"></div>
        <!--购物车区域结束-->
    </div>
    <!--点菜内容区结束-->
    <script type="text/javascript" src="../lib/jquery.min.js"></script>
    <script rel="stylesheet" type="text/javascript" src="../common/headerTab/headerTab.js"></script>
    <script rel="stylesheet" type="text/javascript" src="./left/left.js"></script>
    <script rel="stylesheet" type="text/javascript" src="./right/right.js"></script>
    <script rel="stylesheet" type="text/javascript" src="./shopBar/shopBar.js"></script>
</body>
</html>

    css部分 reset.css跟之前一样

    顶部样式 navheader.css

    专门建立的学习Q-q-u-n： 784783012 ，分享学习的方法和需要注意的小细节，不停更新最新的教程和学习技巧
（从零基础开始到前端项目实战教程，学习工具，全栈开发学习路线以及规划）

.nav { height: 1.706667rem; border-bottom: 1px solid #b2b2b2; position: fixed; width: 100%; top: 0; z-index: 99; background-color: #fff;
} .nav .title { font-size: 0.453333rem; color: #2f2f2f; text-align: center; line-height: 1.946667rem;
} .nav .back-icon { width: 0.72rem; height: 0.72rem; position: absolute; top: 0.613333rem; left: 0.32rem; background-image: url('./img/back.png'); background-size: cover;; }

    tab导航切换样式 headerTab.css

    .tab-bar { font-size: 0.426667rem; display: flex; border-bottom: 1px solid #f0f0f0; margin-top: 1.706667rem;

} .tab-bar .tab-item { flex: 1; height: 1.2rem; line-height: 1.2rem; position: relative; color: #666; text-align: center; text-decoration: none;
} .tab-bar .tab-item.active::after { content: ' '; display: block; height: 0.106667rem; width: 1.6rem; position: absolute; bottom: 0; background-color: #ffd161; left: 50%; transform: translateX(-50%); -webkit-transform: translateX(-50%);
}

    左侧导航样式 left.css

    .menu-inner { position: absolute; right: 0; bottom: 0; top: 2.933333rem; left: 0; display: flex; overflow: hidden;
} .menu-inner .left-bar { width: 2.266667rem; background-color: #efefef; overflow: auto; height: 100%; -webkit-overflow-scrolling: touch;
} .menu-inner .left-bar-inner { padding-bottom: 2.266667rem;
} .menu-inner .left-item { font-size: 0.373333rem; color: #656565; text-align: center; border-bottom: 1px solid #bfbfbf; display: flex; height: 1.6rem; justify-content: center;
} .menu-inner .left-item.active { background-color: #fff;
} .menu-inner .item-text { text-align: center; align-self: center;
} .menu-inner .item-icon { width: 0.533333rem; height: 0.533333rem; display: inline-block; margin-right: 0.16rem; vertical-align: -0.106667rem;
}

    右侧详情区域样式 right.css

    .right-content { flex: 1; margin-left: 0.266667rem; height: 100%; overflow: hidden; -webkit-overflow-scrolling: touch;
} .right-content .right-list { height: 100%; overflow: auto;
} .right-content .right-list-inner { font-size: 0.426667rem; padding-bottom: 2.266667rem;
} .right-content .right-title { font-size: 0.346667rem; color: #333; margin-top: 0.266667rem; padding-left: 0.106667rem; border-left: 0.053333rem solid #ffd161;
} .right-content .menu-item { display: flex; padding-top: 0.666667rem; padding-bottom: 0.666667rem; border-bottom: 1px solid #f0f0f0; position: relative;
} .right-content .menu-item .img { width: 1.653333rem; height: 1.653333rem; margin-right: 0.266667rem;
} .right-content .menu-item-right { flex: 1;
} .right-content .item-title { font-size: 0.426667rem; color: #2f2f2f;
} .item-zan,.item-desc { color: #a9a9a9; font-size: 0.32rem; margin-top: 0.16rem; line-height: 0.373333rem; padding-right: 0.106667rem;

} .right-content .menu-item-right .item-desc { line-height: 0.453333rem;
} .right-content .item-price { margin-top: 0.266667rem; color: #fe4d3d; font-size: 0.48rem;
} .right-content .unit { color: #a9a9a9; font-size: 0.32rem;
} .right-content .select-content { position: absolute; right: 0.24rem; bottom: 0.56rem; display: flex;
} .right-content .plus { width: 0.666667rem; height: 0.666667rem; background-image: url('./img/plus.png'); background-size: cover;
} .right-content .minus { width: 0.666667rem; height: 0.666667rem; background-image: url('./img/minus.png'); background-size: cover;
} .right-content .count { font-size: 0.4rem; color: #2f2f2f; width: 0.666667rem; height: 0.666667rem; line-height: 0.666667rem; margin-left: 0.053333rem; margin-right: 0.053333rem; text-align: center;
}

    购物车区域样式 shopBar.css

    .shop-bar { position: absolute; bottom: 0; left: 0; right: 0; z-index: 99;
} .shop-bar .bottom-content { height: 1.333333rem; display: flex; background-color: rgba(51,51,51,0.9);
} .shop-bar .shop-icon { width: 1.466667rem; height: 1.466667rem; background-image: url('./img/shop-icon.png'); background-size: cover; margin-top: -0.4rem; margin-left: 0.32rem; position: relative;
} .shop-bar .price-content { flex: 1; padding-top: 0.213333rem; padding-left: 0.186667rem;
} .shop-bar .total-price { font-size: 0.533333rem; color: #fff;
} .shop-bar .other-price { font-size: 0.32rem; color: #999; margin-top: 0.053333rem;
} .shop-bar .dot-num { position: absolute; background-color: #fb4e44; width: 0.4rem; height: 0.4rem; font-size: 0.32rem; color: #fff; border: 1px solid #fff; border-radius: 50%; right: 0; top: 0.053333rem; text-align: center; line-height: 0.4rem;
} .shop-bar .submit-btn { width: 2.933333rem; height: 100%; background-color: #ffd161; color: #333; font-size: 0.426667rem; line-height: 1.333333rem; text-align: center;
} .choose-content { background-color: #fff;
} .choose-content .content-top { height: 0.933333rem; background-color: #f4f4f4; font-size: 0.293333rem; display: flex; align-items: center; justify-content: flex-end;
} .choose-content .clear-car { margin-left: 0.266667rem; margin-right: 0.133333rem; float: left; position: relative;
} .choose-content .clear-car::after { content: ' '; width: 0.346667rem; height: 0.346667rem; display: block; background-image: url('./img/clear.jpeg'); background-size: cover; position: absolute; top: -0.026667rem; left: -0.373333rem;

} .choose-content .choose-item { display: flex; font-size: 0.4rem; color: #2f2f2f; height: 0.933333rem; align-items: center; padding-top: 0.266667rem; padding-bottom: 0.266667rem; border-bottom: 1px solid #ddd;
} .choose-content .choose-item .price { margin-left: 0.133333rem; margin-right: 0.666667rem;
} .choose-content .choose-item .item-name { flex: 1; padding-left: 0.266667rem;
} .choose-content .select-content { position: relative; margin-right: 0.213333rem; display: flex;
} .choose-content .plus { width: 0.666667rem; height: 0.666667rem; background-image: url('./img/plus.png'); background-size: cover;
} .choose-content .minus { width: 0.666667rem; height: 0.666667rem; background-image: url('./img/minus.png'); background-size: cover;
} .choose-content .count { font-size: 0.4rem; color: #2f2f2f; width: 0.666667rem; height: 0.666667rem; line-height: 0.666667rem; margin-left: 0.053333rem; margin-right: 0.053333rem; text-align: center;
} .mask { position: fixed; left: 0; right: 0; bottom: 0; top: 0; background-color: rgba(0,0,0,0.7);
}

    然后是js文件

    tab导航切换 headerTab.js

    (function(){ var itemTmpl = '<a class="$key tab-item" href="../$key/$key.html">'+
                      '$text'+
                   '</a>'

    function init(){ var items = [{
            key: 'menu',
            text: '点菜' },{
            key: 'comment',
            text: '评价' },{
            key: 'restanurant',
            text: '商家' }]; var str = '';

        items.forEach(function(item){
            str += itemTmpl.replace(/\$key/g,item.key)
                            .replace('$text',item.text)
        });

        $('.tab-bar').append($(str)); // 找到当前页面的url来确定key值
        var arr = window.location.pathname.split('/'); var page = arr[arr.length-1].replace('.html',''); // 将当前的页面对应的key值的a元素设置active的class
        $('a.'+page).addClass('active');
    }

    init();

})();

    左侧导航 left.js

    (function(){ // 左侧类目item模版字符串
    var itemTmpl = '<div class="left-item">'+
                       '<div class="item-text">$getItemContent'+
                    '</div>'; /**
     * 请求数据
     * param */
    function getList(){
        $.get('../json/food.json', function(data){
            console.log(data);
            window.food_spu_tags = data.data.food_spu_tags || [];
            initContentList(window.food_spu_tags);

            window.ShopBar.changeShippingPrice(data.data.poi_info.shipping_fee || 0);
        })
    } /**
     * 渲染item内容
     * param obj */
    function getItemContent(data){ if (data.icon) { return '<img class="item-icon" src='+data.icon+' />'+data.name;
        } else { return data.name;
        }
    } /**
     * 渲染列表
     * param array */
    function initContentList(list){
        list.forEach(function(item, index){ var str = itemTmpl.
                      replace('$getItemContent', getItemContent(item)); // 将item数据挂载到left-item上面
            var $target = $(str);
            $target.data('itemData',item);

            $('.left-bar-inner').append($target);
        })

        $('.left-item').first().click();
    } function addClick(){
        $('.menu-inner').on('click', '.left-item', function(e){ var $target = $(e.currentTarget);

            $target.addClass('active');
            $target.siblings().removeClass('active'); // 将数据传给右侧详情列表进行渲染
            window.Right.refresh($target.data('itemData'));

        });
    } function init(){
        getList();
        addClick();
    }

    init();

})();

    右侧详情 right.js

    专门建立的学习Q-q-u-n： 784783012 ，分享学习的方法和需要注意的小细节，不停更新最新的教程和学习技巧
（从零基础开始到前端项目实战教程，学习工具，全栈开发学习路线以及规划）

(function(){ // 右侧类目item模版字符串
    var itemTmpl = '<div class="menu-item">'+
                        '<img class="img" src=$picture />'+
                        '<div class="menu-item-right">'+
                           '<p class="item-title">$name</p>'+
                           '<p class="item-desc">$description</p>'+
                           '<p class="item-zan">$praise_content</p>'+
                           '<p class="item-price">¥$min_price<span class="unit">/$unit</span></p>'+
                        '</div>'+
                        '<div class="select-content">'+
                            '<div class="minus"></div>'+
                            '<div class="count">$chooseCount</div>'+
                            '<div class="plus"></div>'+
                        '</div>'+
                    '</div>'; /**
     * 渲染列表
     * param array */
    function initRightList(list){

        $('.right-list-inner').html('');
        list.forEach(function(item, index){ if (!item.chooseCount) {
                item.chooseCount = 0;
            } var str = itemTmpl.
                      replace('$picture', item.picture).
                      replace('$name', item.name).
                      replace('$description', item.description).
                      replace('$praise_content', item.praise_content).
                      replace('$min_price', item.min_price).
                      replace('$unit', item.unit).
                      replace('$chooseCount', item.chooseCount); var $target = $(str);

            $target.data('itemData',item);

            $('.right-list-inner').append($target);

        })
    } /**
     * 渲染右侧title
     * param string */
    function initRightTitle(str){
        $('.right-title').text(str);
    } function addClick(){
        $('.menu-item').on('click', '.plus', function(e){ var $count = $(e.currentTarget).parent().find('.count');

            $count.text(parseInt($count.text()||'0')+1); var $item = $(e.currentTarget).parents('.menu-item').first(); var itemData = $item.data('itemData');

            itemData.chooseCount = itemData.chooseCount + 1;

            window.ShopBar.renderItems();

        });
        $('.menu-item').on('click', '.minus', function(e){ var $count = $(e.currentTarget).parent().find('.count'); if ($count.text() == 0) return;

            $count.text(parseInt($count.text()||'0')-1); var $item = $(e.currentTarget).parents('.menu-item').first(); var itemData = $item.data('itemData');

            itemData.chooseCount = itemData.chooseCount - 1;

            window.ShopBar.renderItems();

        });
    } function init(data){
        initRightList(data.spus || []);
        initRightTitle(data.name);
        addClick();
    }

    window.Right = {
        refresh: init
    }

})();

    购物车区域 shopBar.js

    (function(){ // 顶部模版字符串
    var itemTopTmpl = '<div class="choose-content hide">'+
                          '<div class="content-top">'+
                            '<div class="clear-car">清空购物车</div>'+
                          '</div>'+
                      '</div>'; // 底部模版字符串
    var itemBottomTmpl = '<div class="bottom-content">'+
                            '<div class="shop-icon">'+
                              '<div class="dot-num hide"></div>'+
                            '</div>'+
                            '<div class="price-content">'+
                                '<p class="total-price">¥<span class="total-price-span">0</span></p>'+
                                '<p class="other-price">另需配送&nbsp;¥<span class="shipping-fee">0</span></p>'+
                            '</div>'+
                            '<div class="submit-btn">去结算</div>'+
                        '</div>'; var $strBottom = $(itemBottomTmpl); var $strTop = $(itemTopTmpl); function changeShippingPrice(str){
        $strBottom.find('.shipping-fee').text(str);
    } function changeTotalPrice(str){
        $strBottom.find('.total-price-span').text(str);
    } /**
     * 渲染购物车顶部
     * param */
    function renderItems(){
      $strTop.find('.choose-item').remove(); var list = window.food_spu_tags || []; var tmpl = '<div class="choose-item">'+
                     '<div class="item-name">$name</div>'+
                     '<div class="price">¥<span class="total">$price</span></div>'+
                    '<div class="select-content">'+
                          '<div class="minus"></div>'+
                          '<div class="count">$chooseCount</div>'+
                          '<div class="plus"></div>'+
                      '</div>'; var totalPrice = 0;

      list.forEach(function(item){
          item.spus.forEach(function(_item){ // 如果有菜品数量大于0就开始渲染这条数据
              if (_item.chooseCount > 0) { // 计算每个菜品的总价 就是 单价*数量
                  var price = _item.min_price*_item.chooseCount; var row = tmpl.replace('$name',_item.name)
                            .replace('$price',price)
                            .replace('$chooseCount',_item.chooseCount) // 计算整个总价
                  totalPrice += price; var $row = $(row);

                  $row.data('itemData',_item);

                  $strTop.append($row);
              }
          }) // 改变总价
 changeTotalPrice(totalPrice); // 改变红点个数
 changeDot();

      });

    } /**
     * 渲染数量红点
     * param */
    function changeDot(){ // 先拿到所有的counts
       var $counts = $strTop.find('.count'); var total = 0; // 遍历每个count 相加
       for (var i = 0 ; i < $counts.length ; i++) {
          total += parseInt($($counts[i]).text());
       } if (total > 0) {
        $('.dot-num').show().text(total)
       } else {
        $('.dot-num').hide();
       }
    } function addClick(){

        $('.shop-bar').on('click', '.shop-icon', function(){
            $('.mask').toggle();
            $strTop.toggle();
        });
        $strTop.on('click','.plus', function(e){ var $count = $(e.currentTarget).parent().find('.count');

            $count.text(parseInt($count.text()||'0')+1); var $item = $(e.currentTarget).parents('.choose-item').first(); var itemData = $item.data('itemData');

            itemData.chooseCount = itemData.chooseCount + 1;

            renderItems(); // 找到当前的右侧详情的数据，进行联动
            $('.left-item.active').click();

        });

        $strTop.on('click','.minus', function(e){ var $count = $(e.currentTarget).parent().find('.count'); if ($count.text() == 0) return;
            $count.text(parseInt($count.text()||'0')-1); var $item = $(e.currentTarget).parents('.choose-item').first(); var itemData = $item.data('itemData');

            itemData.chooseCount = itemData.chooseCount - 1;

            renderItems(); // 找到当前的右侧详情的数据，进行联动
            $('.left-item.active').click();

        });
    } function init(data){
      $('.shop-bar').append($strTop);
      $('.shop-bar').append($strBottom);
      addClick();
    }

    init();

    window.ShopBar = {
        renderItems: renderItems,
        changeShippingPrice:changeShippingPrice
    }

})();

    这部分好了，放下效果图

    最后把个人页面也补上(这个项目里最简单的页面）

    my.html

    <!DOCTYPE html>
<html>
<head>
    <title>我的</title>
    <meta charset="utf-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0,maximum-scale=1.0,user-scalable=0">
    <script type="text/javascript"> (function () { var docEl = document.documentElement; function setRemUnit(){ // 获取到rem的基准值
                var rem = docEl.clientWidth / 10; // 动态设置html根元素的font-size
 docEl.style.fontSize = rem + 'px';
            }
            setRemUnit(); // 窗口大小变化时 触发
 window.addEventListener('resize', setRemUnit); // 窗口出现在当前屏幕时 （有浏览器兼容性）
 window.addEventListener('pageshow', function(e){ if (e.persisted) {
                    setRemUnit();
                }
            });
        })(); </script>

    <link rel="stylesheet" type="text/css" href="../lib/reset.css">
    <link rel="stylesheet" type="text/css" href="./my.css">
   <link rel="stylesheet" type="text/css" href="../common/bottomBar/bottomBar.css">
</head>
<body>
    <div class="my">
        <div class="header">
            <img class="avatar" src="http://i.waimai.meituan.com/static/img/default-avatar.png" />
            <p class="nickname">美团小骑手 &gt;</p>
        </div>
        <div class="content">
            <ul class="items">
                <li class="address">收货地址管理</li>
                <li class="money">商家代金券</li>
            </ul>
            <ul class="items">
                <li class="email">意见反馈</li>
                <li class="question">常见问题</li>
            </ul>
            <p class="tel">客服电话:&nbsp;101-097-77</p>
            <p class="time">服务时间:&nbsp;9:00-23:00</p>
        </div>
    </div>
    <!--底部栏开始-->
    <div class="bottom-bar"></div>
    <!--底部栏结束-->
    <script type="text/javascript" src="../lib/jquery.min.js"></script>

    <script type="text/javascript" src="../common/bottomBar/bottomBar.js"></script>

</body>
</html>

    reset.css 和 bottomBar.css 跟之前的一样

    页面样式 my.css

    .header { width: 100%; height: 4.266667rem; background-image: url('./img/header.png'); background-size: cover; overflow: hidden;
} .avatar { width: 1.92rem; height: 1.92rem; margin: 0 auto; display: block; border: 0.08rem solid rgba(255,255,255,0.4); border-radius: 50%; margin-top: 0.666667rem;
} .nickname { color: #333; font-size: 0.426667rem; text-align: center; margin-top: 0.4rem;
} .content { min-height: 13.52rem; background-color: #eee;
} .items { border-bottom: 0.266667rem solid #eee; background-color: #fff;
} .items li { height: 1.2rem; font-size: 0.373333rem; position: relative; padding-left: 0.693333rem; margin-left: 0.4rem; border-bottom: 1px solid #e4e4e4; line-height: 1.2rem;
} .items li::before { content: ' '; display: block; width: 0.426667rem; height: 0.426667rem; position: absolute; left: 0.026667rem; background-size: cover; top: 0.373333rem;

} .items li::after { content: '>'; display: block; width: 0.426667rem; height: 0.426667rem; position: absolute; top: 0; right: 0.16rem; color: #aaa;

} .items li:last-child { border: none;
} .address::before { background-image: url('./img/address.png');
} .money::before { background-image: url('./img/money.png');
} .email::before { background-image: url('./img/email.png');
} .question::before { background-image: url('./img/question.png');
} .tel { font-size: 0.4rem; color: #ffb000; text-align: center; height: 1.226667rem; line-height: 1.226667rem; background-color: #fff;
} .time { font-size: 0.373333rem; text-align: center; margin-top: 0.346667rem; color: #999;
}
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    bottomBar.js 也跟之前的一样

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