前端部落之jQuery

购物车功能:使用jQuery实现购物车全选反选,单选,商品增删,

2019-01-02  本文已影响0人  逸笛

效果图:

canvas.png

html:

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>模拟购物车功能-jq</title>
    <link rel="stylesheet" href="bootstrap-3.3.7-dist/css/bootstrap.min.css" />
     <link rel="stylesheet" href="css/shopCart.css" />
    <script type="text/javascript" src="js/jquery-2.1.0.js" ></script>
</head>
<body>
    
    <table class="table">
        <tr>
            <th id="checkAll"><label><input type="checkbox" checked  />全选</label><button>删除</button></th>
            <th>商品名称</th>
            <th>商品价格(元)</th>
            <th>数目</th>
            <th>小计(元)</th>
            <th>操作</th>
        </tr>
        <tr>
            <td class="check"><label><input type="checkbox"  checked /></label></td>
            <td>商品名称1</td>
            <td class="price">22.50</td>
            <td><span class="sub">-</span><input type="text" value="1" class="num"/><span class="add">+</span></td>
            <td class="subtotal">22.50</td>
            <td class="del"><button>删除</button></td>
        </tr>
        <tr>
            <td class="check"><label><input type="checkbox" checked /></label></td>
            <td>商品名称2</td>
            <td class="price">12.50</td>
            <td><span class="sub">-</span><input type="text" value="1" class="num"/><span class="add">+</span></td>
            <td class="subtotal">12.50</td>
            <td class="del"><button>删除</button></td>
        </tr>
        <tr>
            <td class="check"><label><input type="checkbox" checked /></label></td>
            <td>商品名称3</td>
            <td class="price">110.40</td>
            <td><span class="sub">-</span><input type="text" value="1" class="num"/><span class="add">+</span></td>
            <td class="subtotal">110.40</td>
            <td class="del"><button>删除</button></td>
        </tr>
        <tr>
            <td colspan="5" style="text-align: right;">总件数:<i id="numAll">0</i>件  &nbsp; &nbsp;   总计:<i id="total">0.00</i>元</td>
        </tr>
    </table>
    
    <script src="js/jquery-2.1.0.js" type="text/javascript" charset="utf-8"></script>
    <script src="js/shopCart.js" type="text/javascript" charset="utf-8"></script>
    
</body>
</html>

css样式:

*{
    margin:0;
    padding: 0;
}

table th,table td,input{
    text-align: center;
}
table #checkAll{
    width: 150px;
}
table #checkAll label{
    cursor: pointer;
    background: url(../img/confirm.png) no-repeat center left;
    padding-left:10px;
}
 table .check label{
    cursor: pointer;
    background: url(../img/confirm.png) no-repeat center;
}

table #checkAll input, table .check input{
    visibility: hidden;
    
}

table input[type="text"]{
    width: 50px;
    overflow: hidden;
}
table span{
    display: inline-block;
    width: 20px;
    background: #8C8C8C;
    margin:0px 5px ;
    color: #FFFFFF;
    cursor: pointer;
}

js:

$(function() {

    // 全选
    $("#checkAll input").click(function() {
        var flag = $(this).prop("checked");
        if(flag) {
            $(".check label input").prop("checked", true);

            $("#checkAll label").css("background", "url(img/confirm.png) no-repeat center left");
            $(".check label").css("background", "url(img/confirm.png) no-repeat center");

        } else {
            $(".check label input").prop("checked", false);

            $("#checkAll label").css("background", "url(img/confirm_no.png) no-repeat center left");
            $(".check label").css("background", "url(img/confirm_no.png) no-repeat center");
        }
        counts();
        totalPrice();
    });

    //单选
    $(".check input").click(function() {
        var flag = $(this).prop("checked"); //获取当前input的状态
        var CL = $(".check input").length; //列表长度;
        var CH = $(".check input:checked").length; //列表中被选中的长度

        if(flag) {
            $(this).parent("label").css("background", "url(img/confirm.png) no-repeat center");
        } else {
            $(this).parent("label").css("background", "url(img/confirm_no.png) no-repeat center");
        }

        if(CL == CH) {
            $("#checkAll input").prop("checked", true);
            $("#checkAll label").css("background", "url(img/confirm.png) no-repeat center left");
        } else {
            $("#checkAll input").prop("checked", false);
            $("#checkAll label").css("background", "url(img/confirm_no.png) no-repeat center left");
        }
        counts();
        totalPrice();
    })

    //数目加
    $(".add").click(function() {
        var num = $(this).prev().val();
        var price = parseFloat($(this).parent().siblings(".price").text());
        num++;
        $(this).prev().val(num);

        //      小计
        $(this).parent().siblings(".subtotal").text((price * num).toFixed(2));
        counts();
        totalPrice();
    })

    //数目减
    $(".sub").click(function() {
        var num = $(this).next().val();
        var price = parseFloat($(this).parent().siblings(".price").text());
        num--;

        if(num <= 0) {
            num = 0
        }
        $(this).next().val(num);

        //      小计
        $(this).parent().siblings(".subtotal").text((price * num).toFixed(2));
        counts();
        totalPrice();
    })

    //文本框脱里焦点处理
    $('.num').each(function(i) {
        $(this).blur(function() {
            let p = parseFloat($(this).parents('tr').find(".subtotal").text());
            let c = parseFloat(this.value);
            console.log(p*c);
            $(this).parents('tr').find(".subtotal").text((c * p).toFixed(2));
            counts();
            totalPrice();
        })
    })

    //单行删除
    $(".del button").click(function() {
        var flag = $(this).parent().siblings().find("input").prop("checked");
        if(flag) {
            if(confirm("是否确定删除")) {
                $(this).parents("tr").remove();
                var CL = $(".check input").length; //列表长度;
                if(CL == 0) {
                    $("#checkAll label input").prop("checked", false);
                    $("#checkAll label").css("background", "url(img/confirm_no.png) no-repeat center left");
                }
                counts();
                totalPrice();
            }
        }
    })

    //全删除
    $("#checkAll button").click(function() {
        var flag = $(this).prev().children().prop("checked");
        //        console.log(flag);
        if(flag) {

            if(confirm("是否确定删除")) {

                $(".check").parent().remove();
                var CL = $(".check input").length; //列表长度;

                if(CL == 0) {
                    $("#checkAll label input").prop("checked", false);
                    $("#checkAll label").css("background", "url(img/confirm_no.png) no-repeat center left");
                }
                counts();
                totalPrice();
            }

        }
    })

    //总价格
    totalPrice();

    function totalPrice() {
        var prices = 0;
        $('.check input:checked').each(function(i) {
            console.log()
            prices += parseFloat($(this).parents("tr").find('.subtotal').text());
        })
        $('#total').text(prices);
    }
    //总数目
    counts();

    function counts() {
        var sum = 0;
        $('.check input:checked').each(function(i) {
            sum += parseInt($(this).parents("tr").find('.num').val());
        })
        $('#numAll').text(sum);
    }

})
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