父子组件间的数据传递
数据的化就利用:count ="3"的值传到props:[‘count’]。
还有就是组件内定义的函数方法传值到外，this.$emit(‘inc’, 2)。
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
<script src='./vue.js'></script>
</head>
<body>
<div id="root">
<!-- 加:会变为字符串，不加就是数字 -->
<counter :count="3" @inc="handleIncrease"></counter>
<counter :count="2" @inc="handleIncrease"></counter>
<div>{
{total}}</div>
</div>
<script>
var counter = {
props: ['count'],
data: function() {
return {
number: this.count
}
},
template: '<div @click="handleClick">{
{number}}</div>',
methods: {
handleClick: function() {
this.number = this.number + 2;
this.$emit('inc', 2)
}
}
}
var vm = new Vue({
el: '#root',
data: {
total: 5
},
components: {
counter: counter
},
methods: {
handleIncrease: function(step) {
this.total += step
}
}
})
</script>
</body>
</html>