<!DOCTYPE html>
<html >
<head>
<meta charset="UTF-8">
<title>vuex之使用mutations修改购物车仓库数据</title>
<script src="vue.js"></script>
<script src="vuex.js"></script>
</head>
<body>
<div >
<footer-cart></footer-cart>
<Lists></Lists>
</div>
<script type="text/x-template" >
<div>
<h1 v-if="goods.length==0">
购物车中没有商品
<a href="">去购物吧</a>
</h1>
<div v-if="goods.length>0">
<table >
<tr>
<th>编号</th>
<th>名称</th>
<th>价格</th>
<th>数量</th>
<th>总计</th>
<th>操作</th>
</tr>
<tr v-for="v in goods">
<td>{{v.id}}</td>
<td>{{v.title}}</td>
<td>{{v.price}}</td>
<td>
<input type="text" v-model="v.num">
</td>
<td>{{v.totalPrice}}</td>
<td>
<button @click="del(v.id)">删除</button>
</td>
</tr>
</table>
</div>
</div>
</script>
<script type="text/x-template" >
<div v-if="totalPrice>0">
<div>
总计：{{totalPrice}}
</div>
</div>
</script>
<script>
let Lists = {
template: "#Lists",
computed: {
goods() {
return this.$store.getters.goods;
}
},
methods: {
del(id) {
this.$store.commit('del', {id})
}
}
}
let footerCart = {
template: "#footerCart",
computed: {
totalPrice() {
return this.$store.getters.totalPrice;
}
}
}
let store = new Vuex.Store({
state: {
goods: [
{id: 1, title: 'ihpone7', price: 100, num: 3},
{id: 2, title: 'vivo20', price: 100, num: 2}
]
},
getters: {
//获取商品总价：
totalPrice: state => {
let totalPrice = 0;
state.goods.forEach((v) => {
totalPrice += v.num * v.price;
});
return totalPrice;
},
goods(state) {
let goods = state.goods;
goods.forEach((v) => {
v.totalPrice = v.num * v.price;
})
return goods;
}
},
mutations: {
//删除购物车中的商品
del(state, param) {
let k;
for (let i = 0; i < state.goods.length; i++) {
if (state.goods[i].id == param.id) {
k = i;
break;
}
}
state.goods.splice(k, 1);
}
}
});
var app = new Vue({
el: "#demo",
store,
components: {
Lists, footerCart
}
});
</script>
</body>
</html>