<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>基础组件</title>
<script src="vue.js" type="text/javascript" charset="utf-8"></script>
</head>
<style type="text/css">
.box{
position: relative;
width: 64px;
height: 45px;
}
input{
position: absolute;
left: 0;
top: 0;
display: inline-block;
width: 45px;
height: 45px;
}
button{
position: absolute;
right: 0px;
width: 20px;
height: 27px;
}
.bt1{
position: absolute;
top: 0;
}
.bt2{
position: absolute;
bottom: -6px;
}
</style>
<body>
<div id="app">
<myp :post="1"></myp> <!-- 传入值1每次加1 -->
<!-- 修改post的值改变商品添加个数 -->
<p>拓展：商品添加个数内部修改</p>
</div>
<script type="text/javascript">
var myp = {
template:`
<div class='box'>
<input type="text" v-model="num" @blur='tx()'/>
<button @click="add()" class='bt1'>+</button>
<button @click="del()" class='bt2'>-</button>
</div>
`,
props:{
'post':{
type:Number,
default:1
}
},
created(){
this.temp2 = this.post*1
console.log(this.temp2)
},
data:function(){
return {num:1,temp:1,temp2:1}
},
methods:{
add(){
if(this.num < 5){
this.num = this.num + this.temp2
this.temp = this.num + this.temp2
}else{
alert('最多购买5件商品')
}
},
del(){
if(this.num > 1){
this.num = this.num - this.temp2
this.temp = this.num - this.temp2
}
},
tx(){
if(this.num > 5){
alert('最多购买5件商品')
this.num = 5
this.temp = 5
}else if(typeof this.num != Number){
//判断数据类型，如果不是数字就赋值为上次输入的值
alert('请输入数字')
this.num = this.temp
}
}
}
}
new Vue({
el:"#app",
data:{
},
components:{myp}
})
</script>
</body>
</html>
