Vue写一个购物车
<!DOCTYPE html> <html> <head> <meta charset="utf-8"> <link rel="stylesheet" href="https://cdn.bootcss.com/bootstrap/3.0.2/css/bootstrap.min.css"/> </head> <body>
<div id="app" class="container">
<table class="table">
<thead>
<tr>
<th>产品编号</th>
<th>产品名字</th>
<th>购买数量</th>
<th>产品单价</th>
<th>产品总价</th>
<th>操作</th>
</tr>
</thead>
<tbody>
<tr v-for="(item , index) in message">
<td @click="jia(index)">{{item.id}}</td>
<td>{{item.name}}</td>
<td>
<button type="button" class="btn tn-primary" @click="subtract(index)">-</button>
<input type="text" v-model="item.quantity">
<button type="button" class="btn tn-primary" @click="add(index)">+</button>
</td>
<td>{{item.price | filtermoney}}</td>
<!--<td>{{arr[index].one}}</td>-->
<td>{{item.price*item.quantity | filtermoney}}</td>
<td>
<button type="button" class="btn btn-danger" @click="remove(index)">移除</button>
</td>
</tr>
<tr>
<td>总购买价
</td>
<td>
{{animatenum | filtermoney}}
</td>
<td>总购买数量
</td>
<td>
</td>
<td colspan="2">
<button type="button" class="btn btn-danger" @click="empty()">清空购物车</button>
</td>
</tr>
</tbody>
</table>
<p v-if="message.length===0">您的购物车为空</p>
</div>
<script src="https://unpkg.com/tween.js@16.3.4"></script>
<script src="https://cdn.bootcss.com/vue/2.2.3/vue.min.js"></script>
<script>
var vm=new Vue({
el:"#app",
data:{
totalPrice:0,
animatenum:0,
message:[
{
id: 007,
name: 'iphone5s',
quantity: 3,
price: 4000
},{
id: 1340,
name: 'iphone5',
quantity: 9,
price: 3000
},{
id: 7758,
name: 'imac',
quantity: 4,
price: 7000
},{
id: 2017,
name: 'ipad',
quantity: 5,
price: 6000
}
]
},
watch:{
toComput2:function(newValue,oldValue){
this.tween(newValue,oldValue);
}
},
computed:{
//计算总金额
toComput2:function(){
var vm=this;
//每次进来要重置总金额
vm.totalPrice=0;
this.message.forEach(function(mess){
vm.totalPrice+=parseInt(mess.price*mess.quantity);
})
return this.totalPrice;
}
},
filters:{
filtermoney:function(value){
return '￥'+value ;
}
},
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mounted:function(){
this.tween('97000','0');
},
methods:{
//计算总数的方法为什么写在methods里面就不行？
toComput:function(){
var vm=this;
vm.message.forEach(function(mess){
vm.totalPrice+=parseInt(mess.price*mess.quantity);
})
return vm.totalPrice;
},
add:function(index){
var vm=this;
vm.message[index].quantity++;
},
subtract:function(index){
var vm=this;
vm.message[index].quantity--;
if(vm.message[index].quantity<=0){
if (confirm("你确定移除该商品？")) {
vm.message.splice(index,1)
}
}
},
remove:function(index){
var vm=this;
if (confirm("你确定移除该商品？")) {
vm.message.splice(index,1)
}
},
empty:function(){
var vm=this;
vm.message.splice(0,vm.message.length);
},
jia:function(index){
var vm=this;
vm.arr[index].one++;
},
tween:function(newValue,oldValue){
var vm=this;
var twen=new TWEEN.Tween({animatenum:oldValue});
function animate() {
requestAnimationFrame(animate);
TWEEN.update();
};
twen.to({animatenum:newValue},750);
twen.onUpdate(function(){
//toFixed();保留几位小数
vm.animatenum = this.animatenum.toFixed();
})
twen.start();
animate();
}
}
});
</script>
</body> </html>
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