vue点击自增和求和的实例代码
时间：2021-01-17 14:06:45 | 栏目：vue | 点击：次
如下所示：
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>ref</title>
<script type="text/javascript" src="js/vue.js" ></script>
</head>
<body>
<div id="root">
<counter></counter>
<counter></counter>
</div>
<script>
Vue.component('counter',{
template:'<div @click="handleClick">{{number}}</div>',
data:function () {
return {
number:0
}
},
methods:{
handleClick:function () {
this.number++
}
}
})
var vm = new Vue({
el:'#root',
})
</script>
</body>
</html>
求和
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>ref</title>
<script type="text/javascript" src="js/vue.js" ></script>
</head>
<body>
<div id="root">
<counter ref="one" @change="handleChange"></counter><!--2.父组件监听-->
<counter ref="two" @change="handleChange"></counter>
<div >{{total}}</div><!--//子组件向父组件传值--><!--求和-->
</div>
<script>
Vue.component('counter',{
template:'<div @click="handleClick">{{number}}</div>',
data:function () {
return {
number:0
}
},
methods:{
handleClick:function () {
this.number++ //点击数字自增一
this.$emit('change')//1.子组件向外触发change函数，父组件<counter>监听
}
}
})
var vm = new Vue({
el:'#root',
data:{
total:0
},
// 3.在父组件里定义handleChange方法
methods:{
handleChange:function () {
this.total=this.$refs.one.number + this.$refs.two.number
console.log(this.$refs.one.number)
console.log(this.$refs.two.number)
}
}
})
// 4.在counter里定义ref="one"
// 5.在vue里定义 console.log(this.$refs.one) 再通过number获取自增的值
// 6.通过total获取两数之和
</script>
</body>
</html>
