Vuex实现简单购物车

本文实例为大家分享了Vuex实现简单购物车的具体代码，供大家参考，具体内容如下

文件结构

App.vue

<template>
<div id="app">
<h3>Shopping Cart Demo</h3>
<hr>
<h4>Products:</h4>
<ProductList />
<hr>
<h4>My Cart</h4>
<ShoppingCart />
</div>
</template>
<script>
import ProductList from '@/components/ProductList';
import ShoppingCart from '@/components/ShoppingCart';

export default {
components: {
ProductList,
ShoppingCart
}
}
</script>

Products.vue

<template>
<div>
 <ul v-for="item in products" :key="item.id">
 <li>
  {{ item.title }} - {{ item.price }} &nbsp;&nbsp; 库存： {{ item.inventory }}<br>
  <button :disabled="!item.inventory" @click="addToCart(item)">add to cart</button>
 </li>
 </ul>
</div>

</template>

<script>
import { mapGetters, mapActions } from 'vuex';
export default {
computed: {
// ...mapGetters('products',{
// products: 'allProducts'
// })
...mapGetters({
 products: 'products/allProducts'
})
},
methods: {
...mapActions('cart',['addToCart'])
},
created() {
this.$store.dispatch('products/getAllProducts');
}

}
</script>

ShoppingCart.vue

<template>
<div>
<ul v-for="item in products" :key="item.id">
 <li>{{ item.title }} *{{ item.quantity }}</li>
</ul>
<div>total: {{ total }}</div>
</div>
</template>
<script>
import { mapGetters } from 'vuex';
export default {
computed: {
...mapGetters('cart', {
 products: 'cartProducts',
 total: 'cartTotalPrice'
})
}
}
</script>

modules/products.js

import api from '../../api';

const state = {
all: []
}

const getters = {
allProducts: state => state.all
}

const actions = {
// 获取初始商品数据
getAllProducts({ commit }) {
api.getProducts(products => commit('setProducts', products));
}
}

const mutations = {
setProducts(state, products) {
state.all = products;
},
// 减少该商品库存
decreamentInventory(state, { id }) {
let productItem = state.all.find(item => item.id === id);
productItem.inventory --;
}
}

export default {
namespaced: true,
state,
getters,
actions,
mutations
}

modules/cart.js

const state = {
addedList: []
}

const getters = {
cartProducts(state, getters, rootState) {
return state.addedList.map((item, index) => {
 let productItem = rootState.products.all.find(product => product.id === item.id);
 return {
 title: productItem.title,
 price: productItem.price,
 quantity: item.quantity
 }
})
},
cartTotalPrice(state, getters) {
return getters.cartProducts.reduce((total, product) => {
 return total + (product.price * product.quantity);
}, 0);
}
}

const actions = {
addToCart({ state, commit }, product) {
if (product.inventory > 0) {
 let productItem = state.addedList.find(item => item.id === product.id);
 if (productItem) {
 commit('increamentItemQuantity', productItem);
 } else {
 commit('pushItemToCart', product);
 }
 commit('products/decreamentInventory', product, { root: true });
}
}
}

const mutations = {
// 增加购物车中同等商品的数量
increamentItemQuantity(state, { id }) {
let productItem = state.addedList.find(item => item.id === id);
productItem.quantity ++;
},
// 将商品加入购物车
pushItemToCart(state, { id }) {
state.addedList.push({
 id,
 quantity: 1
})
},

}

export default {
namespaced: true,
state,
getters,
actions,
mutations
}

store/index.js

import Vue from 'vue';
import Vuex from 'vuex';
import cart from './modules/cart';
import products from './modules/products';

Vue.use(Vuex);

export default new Vuex.Store({
modules: {
cart,
products
}
});

main.js

import Vue from "vue";
import App from "@/components/App.vue";
import store from "@/store";

Vue.config.productionTip = false;

new Vue({
store,
render: h => h(App)
}).$mount("#app");

来源：https://blog.csdn.net/jinmo277/article/details/91569317