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  • vue备忘录购物车案例

    Carts.vue

    <template>
        <div>
            <h2>购物车</h2>
            <ul>
                <li v-for="item,index of fruits" :key="index" >{{item.name}} 价格:{{item.price}}
                     <ControlsA :num="item.num" :index="index" @add="add" @sub="sub"></ControlsA>
                </li>
            </ul>
        </div>
    </template>
    <script>
    import ControlsA from "./ControlsA.vue"
    export default {
        data(){
            return{
                fruits:[
                    {name:"apple",price:3.2,num:0},
                    {name:"pineapple",price:3.4,num:1},
                    {name:"banana",price:3.0,num:2}
                ]
            }
        },
        components:{ControlsA},
        methods:{
            add(index){
                this.fruits[index].num++
            },
            sub(index){
                if(this.fruits[index].num>0){
                    this.fruits[index].num--
                }
            }
        }
    }
    </script>
    
    

    ControlsA.vue

    <template>
        <div>
            <!-- 是carts的子组件 -->
            <button @click="sub">-</button>{{num}}
            <button @click="add">+</button>
        </div>
    </template>
    <script>
    export default {
        props:["num","index"],
        methods:{
            add(){
                this.$emit("add",this.index)//this.index
            },
            sub(){
                this.$emit("sub",this.index)
            }
        }
    }
    </script>
    
    

    App.vue

    <template>
      <div>
        <CartsA></CartsA>
      </div>
    </template>
    
    <script>
    import CartsA from "./components/CartsA.vue"
    export default {
     components:{CartsA}
    }
    </script>
    
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  • 原文地址:https://www.cnblogs.com/icemiaomiao3/p/15700812.html
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