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18.jQuery商品类型选择效果-2019年01月23号
万物皆对象
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实例

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>2.商品类型选择效果</title>
    <script src="https://code.jquery.com/jquery-3.1.1.min.js"></script>
</head>
<body>
    <div class="top">请选择商品类型</div>
    <div class="main">
        <p class="item" name="version">
            <b class="notice">版本</b>
            <span>iPhone8</span>
            <span>iPhoneX</span>
            <span>iPhoneXS</span>
        </p>
        <p class="item" name="color">
            <b class="notice">机身颜色</b>
            <span>***金</span>
            <span>黑色</span>
            <span>白色</span>
        </p>
        <p class="item" name="type">
            <b class="notice">套餐类型</b>
            <span>官方标配</span>
            <span>套餐一</span>
            <span>套餐二</span>
        </p>
        <p class="item" name="ROM">
            <b class="notice">机身内存</b>
            <span>64GB</span>
            <span>128GB</span>
            <span>256GB</span>
        </p>
        <p class="item" name="location">
            <b class="notice">产地</b>
            <span>中国大陆</span>
            <span>港澳台</span>
        </p>
        <p class="item" name="price">
            <b class="notice">价格</b>
            <span>999元抢购</span>
        </p>
        <p class="item1" name="num">
            <b class="notice">数量</b>
            <input type="number" value="1" style="width:40px;height:24px;margin-left: 5px;">
        </p>
        <p style="margin-top:30px;margin-left:95px;">
            <button class="btn1" id="sub">立即购物</button>
        </p>
    </div>
</body>
</html>
<script>
$(function(){
    /*
        第一步:点击span标签的时候判断
        span标签class是否存在select样式
        存在就true,反之false;
    */ 
    $('span').click(function(){
        if($(this).hasClass('select')){
            // 如果为true证明有select,点击的时候就会移除
            $(this).removeClass('select'); 
        }else{
            // 反之会添加select样式并移除同胞select样式
            // (意思就是单选,如果多选则不用移除同胞的样式)
            $(this).addClass('select').siblings().removeClass('select'); // 单选
            //$(this).addClass('select'); // 多选
        }
    });

    /*
        第二步:点击按钮时将选择的商品类型
        存入对象中
    */
    $('.btn1').click(function(){
        let list = {};  // 创建一个对象
        let status = true;
        // 遍历class为item的p标签
        $('.item').each(function(){
            /*  循环遍历获取到p标签下面的子元素
                span标签样式为select并得到他的长度,
                当长度不等于1时状态值为false,
                意味着还有些类型没有被选中
            */
            if( $(this).children('span.select').length != 1 ){
                status = false;
            }else{
                /*  反之获取p标签的name值作为key,
                    然后获取p标签下面的子元素span标签带有select样式的值,
                    最后将值存入对象里
                */
                let key = $(this).attr('name');
                let val = $(this).children('span.select').html();
                list[key] = val;
            }
        });

        // 第三步:判断input框type为number的值是否低于1
        if($('.item1').children('input').val() < 1){
            status = false;
            alert('商品数量至少为1');
        }else{
            // 反之就获取p标签子元素input框的值,将值存入对象
            list['num'] = $('.item1').children('input').val();
            console.log(list);
        }
        status === true ? alert('可以加入购物车了') : '' ;
    });
});
</script>

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CSS:

实例

        *{margin: 0 auto;padding: 0;}
        .top{
            width: 402px;
            height: 35px;
            background: #c40000;
            margin-top: 20px;
            text-align: center;
            line-height: 35px;
            color: #fff;
        }
        .main{
            width: 400px;
            height: 400px;
            border: 1px solid #c40000;
        }
        p{
            width: 400px;
            height: 26px;
            margin-top: 10px;
        }
        b{
            width: 90px;
            height: 26px;
            line-height: 26px;
            text-align: center;
            font-size: 12px;
            color: #838383;
            border: 1px solid #ccc;
            float: left;
            margin-left: 5px;
        }
        span{
            width: 90px;
            height: 26px;
            line-height: 26px;
            text-align: center;
            font-size: 12px;
            color: #838383;
            border: 1px solid #ccc;
            display: block;
            float: left;
            margin-left: 5px;
        }
        span:hover{
            cursor: pointer; /*鼠标移入后变成手指*/
        }
        button{
            width: 120px;
            height: 35px;
            background: #c40000;
            color: white;
            border: 0px;
        }
        button:hover{
            cursor: pointer;
        }
        .notice{
            border:0px;
        }
        .select{
            border: 2px solid red;
            width: 88px;
            height: 24px;
            line-height: 24px;
            color: red;
        }

运行实例 »

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666.jpg

Correction status:Uncorrected

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