vue.js购物车

vue.js

https://cn.vuejs.org/v2/guide/

简单购物车

<html>

<head>
    <script src="https://cdn.jsdelivr.net/npm/vue/dist/vue.js"></script>
    <style>
        table {
            border: 1px solid black;
        }

        table {
            width: 100%;    border-spacing: 0;
        }

        th {
            background-color: #ddd;
        }

        th,
        td {
            border-bottom: 1px solid #ddd;height: 50px;text-align:center;
        }

        .red {
            color: red
        }

        .green {
            color: green
        }
    </style>
</head>

<body>
    <div id="app">
        <table>
            <tr>
                <th>序号</th>
                <th>商品名称</th>
                <th>商品价格</th>
                <th>购买数量</th>
                <th>操作</th>
            </tr>
            <tr v-for="iphone in PJson">
                <td>{{ iphone.id }}</td>
                <td>{{ iphone.name }}</td>
                <td class="red">￥{{ iphone.price }}</td>
                <td>
                    <button v-bind:disabled="iphone.count == 1" v-on:click="iphone.count-=1" v-bind:class="{green:iphone.count>1,red:iphone.count==1}">-</button>
                    {{ iphone.count }}
                    <button v-bind:disabled="iphone.count == 9" v-on:click="iphone.count+=1" v-bind:class="getBtnClass(iphone.count)">+</button>
                </td>
                <td>
                    <button v-on:click="del($index)">移除</button>
                </td>
            </tr>
        </table>
        <p>
            说明：满100包邮，每个商品限购9件
        </p>
        <p>
            <span class="red">总价：￥{{totalPrice()}}</span>
            <span class="green" v-if="totalPrice()>0" v-show="youfei>0">（含邮费￥{{youfei}}）</span>
            <span class="green" v-show="youfei==0">（包邮）</span>
        </p>

    </div>

    <script>
        var app = new Vue({
            el: '#app',
            data: {
                youfei: 10,
                PJson: [
                    {
                        id: 1,
                        name: 'iphone1',
                        price: 10,
                        count: 1
                    },
                    {
                        id: 2,
                        name: 'iphone2',
                        price: 20,
                        count: 1
                    },
                    {
                        id: 3,
                        name: 'iphone3',
                        price: 30,
                        count: 1
                    }]

            },
            computed: {
                //写在methods里也可以的
                getBtnClass(){
                    return function(num)
                    {
                        return{green:num<9,red:num==9}
                    }
                }
            },
            /*computed: {
                youhui:function(){
                    return 100
                }
            },*/
            methods: {
                del: function (ii) {
                    this.PJson.splice(ii, 1);
                },
                totalPrice: function () {
                    var totalP = 0;
                    for (var i = 0, len = this.PJson.length; i < len; i++) {
                        totalP += this.PJson[i].price * this.PJson[i].count;
                    }
                    if (totalP >= 100) {
                        this.youfei = 0
                    } else {
                        this.youfei = 10
                    }
                    if (totalP > 0) {
                        return totalP + this.youfei;
                    }
                    return 0;
                },
                getBtnClass2:function(num)
                {
                    return{green:num<9,red:num==9}
                }
                


            }
        })</script>
</body>

</html>

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 回溯与递归
原文地址：https://www.cnblogs.com/webapi/p/10584587.html