购物车是table做的，是一个响应式的购物车

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body：

<div id="app">
    <!--我们在写代码或者效果时很容易忘记这个自定义组件名-->
   <my-component></my-component>
</div>

js:

<script>
    var model=Vue.component('my-component',{
        template:
        `
            <div>
               <ttable v-bind:number='arr'></ttable>
            </div>
        `,
        data:function(){
            return{
                arr:[
                    {number:1,mc:'apple',dj:14,num:1},
                    {number:2,mc:'banana',dj:8,num:1},
                    {number:3,mc:'orange',dj:3,num:1}
                ]
            }
        }
    })

    Vue.component('ttable',{
        props:['number'],
        template:
        `
            <div class='container'>
                <table class='table table-bordered text-center'>
                    <thead>
                        <tr>
                            <th class='text-center'>编号</th>
                            <th class='text-center'>名称</th>
                            <th class='text-center'>单价</th>
                            <th class='text-center'>数量</th>
                            <th class='text-center'>小计</th>
                        </tr>
                    </thead>
                    <tbody>
                        <tr v-for='(value,index) in number'>
                            <td>{{value.number}}</td>
                            <td>{{value.mc}}</td>
                            <td>{{value.dj}}</td>
                            <td>
                            <button @click='add(index)'>+</button>
                            {{value.num}}
                            <button @click='delt(index)'>-</button>
                            </td>
                            <td>{{(value.dj)*(value.num)}}</td>
                        </tr>
                        <tr>
                            <td colspan='5'>总计:<span>{{total}}</span>元</td>
                        </tr>
                    </tbody>
                </table>
            </div>
        `,
        data:function(){
            return{
                total:25
            }
        },
        methods:{
            add:function(index){
                this.number[index].num++
                this.getTotal()
            },
            delt:function(index){
                if(this.number[index].num>1){
                    this.number[index].num--
                }
                this.getTotal()
            },
            getTotal:function(){
                for(var i=0,to=0;i<this.number.length;i++){
                    to+=Number(this.number[i].dj*this.number[i].num)
                }
                this.total=to;
            }
        }
    })

    new Vue({
        el: '#app'
    })
</script>