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52<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<title>Document</title>
<script src="https://cdn.bootcss.com/vue/2.4.2/vue.min.js"></script>
</head>
<body>
<div id="app">
数字1：{{num1|tolent}}<br>
数字2：{{num2|tolent}}<br>
数字3：{{num3|tolent}}<br>
求和：{{sum|tolent}}
<p>{{a}}</p>
<button v-on:click='plus'>加1</button>
</div>
<script>
let vm=new Vue({
el:"#app",
data:{
num1:23.45,
num2:34.599,
num3:1234.340,
a:0
},
filters:{ //过滤属性
tolent(value){
return parseInt(value);
}
},
computed:{ //计算属性
sum(){
return this.num1+this.num2+this.num3;
}
},
methods:{//自定义方法
plus(){
return this.a++;
}
},
watch:{//暗中观察
a(){
console.log('有了新的变化')
console.log(this.a);
}
}
})
</script>
</body>
</html>