vuex实现简单的购物车功能
本文实例为大家分享了vuex实现购物车功能的具体代码,供大家参考,具体内容如下
文件目录如下:
购物车组件
<template> <div> <h1>vuex-shopCart</h1> <div class="shop-listbox"> <shop-list /> </div> <h2>已选商品</h2> <div class="shop-cartbox"> <shop-cart /> </div> </div> </template> <script> import shoList from './shop-list' import shopCart from './shop-cart' export default { name: 'shop', components: { 'shop-list' : shoList, 'shop-cart' : shopCart } } </script> <!-- Add "scoped" attribute to limit CSS to this component only --> <style scoped> </style>
商品列表
<template> <div class="shop-list"> <table> <tr class="shop-listtitle"> <td>id</td> <td>名称</td> <td>价格</td> <td>操作</td> </tr> <tr v-for = "item in shopList" class="shop-listinfo" :key="item.id"> <td>{{item.id}}</td> <td>{{item.name}}</td> <td>{{item.price}}</td> <td> <button @click="addToCart(item)">加入购物车</button> </td> </tr> </table> </div> </template> <script> import {mapGetters,mapActions} from "vuex"; export default { name : 'shopList', computed: { ...mapGetters({ shopList:'getShopList', }) }, methods: { ...mapActions(['addToCart']) }, } </script>
选中商品列表
<template> <div class="shop-list"> <table> <tr class="shop-listtitle"> <td>id</td> <td>名称</td> <td>价格</td> <td>数量</td> <td>操作</td> </tr> <tr v-for="item in cartData" class="shop-listinfo" :key="item.id"> <td>{{item.id}}</td> <td>{{item.name}}</td> <td>{{item.price}}</td> <td>{{item.num}}</td> <td><button class="shop-dele dele-btn" @click="deleteShop(item)">删除</button></td> </tr> <tr v-if="cartData.length <= 0"> <td colspan="5">暂无数据</td> </tr> <tr> <td colspan="2">总数:{{totalNum}}</td> <td colspan="2">总价格:{{totalPrice}}</td> <td><button class="dele-cart dele-btn" @click="clearCart">清空购物车</button></td> </tr> </table> </div> </template> <script> import {mapGetters,mapActions} from 'vuex' export default { name : 'shopCart', data(){ return{ } }, computed: { ...mapGetters({ cartData:'addShopList', totalNum : 'totalNum', totalPrice:'totalPrice' }) }, methods: { ...mapActions({ clearCart:'clearToCart', deleteShop:"deletToShop" }) } } </script>
vuex 创建
npm install vuex --save,创建vuex文件夹,在文件夹中创建store.js,引入vuex;
store.js
import Vue from "vue" import Vuex from 'vuex' import cart from './modules/cart' Vue.use(Vuex) export default new Vuex.Store({ modules: { cart } })
建立一个模块文件夹modules,里面创建创建当个store模块,然后默认输出,在store.js中引入;
cart.js
const state = { shop_list: [{ id: 11, name: '鱼香肉丝', price : 12 }, { id: 22, name: '宫保鸡丁', price : 14 }, { id: 34, name: '土豆丝', price : 10 }, { id: 47, name: '米饭', price : 2 }, { id: 49, name: '蚂蚁上数', price : 13 }, { id: 50, name: '腊肉炒蒜薹', price : 15 }], add : [] } const getters = { // 获取商品列表 getShopList: state => state.shop_list, // 获取购物车列表 addShopList: state => { // map()方法返回一个新数组,数组中的元素为原始数组元素调用函数处理后的值 return state.add.map(({ id, num }) => { let product = state.shop_list.find(n => n.id == id)// find()方法返回通过测试(函数内判断)的数组的第一个元素的值,如果没有符合条件的元素返回undefined if (product) {// 如果存在该商品 return {// 返回对象 ...product, num } } }) }, // 获取总数量 totalNum: (state, getters) => { let total = 0 getters.addShopList.map(n => { total += n.num }) return total }, // 计算总价格 totalPrice: (state, getters) => { let total = 0 getters.addShopList.map(n => { total += n.num * n.price }) return total } }, const actions = { // 加入购物车 addToCart({ commit},product) { commit('addCart', { id : product.id }) }, // 清空购物车 clearToCart({ commit}) { commit('clearCart') }, // 删除单个物品 deletToShop({ commit},product) { commit('deletShop',product) } } const mutations = { // 加入购物车 addCart(state, { id}){ let record = state.add.find(n => n.id == id) if (!record) {// 如果购物车中不存在该商品 state.add.push({// 追加商品 id, num : 1 }) } else { // 如果商品已经加入购物车,则改变数量 record.num++ } }, // 删除单个物品 deletShop(state, product) { state.add.forEach((item,i) => { if (item.id == product.id) {// 如果找到该商品 state.add.splice(i,1) } }) }, // 清空购物车 clearCart(state) { state.add = [] } } export default { state, getters, actions, mutations }
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