<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>hello2</title>
</head>
<body>
<div id="app">
<counter :num="count" @incr="add" @decr="reduce"></counter>
</div>
<script src="node_modules/vue/dist/vue.js"></script>
<script>
/*局部组件*/
const counter = {
template: `<div>
<button @click="handleAdd">+</button>
<button @click="handleReduce">-</button>
<h1>
num:{{num}}
</h1>
</div>`,
props: ['num'],
methods: {
handleAdd() {
this.$emit('incr');
},
handleReduce() {
this.$emit('decr');
}
}
}
const app = new Vue({
el: "#app",
data: {
count: 0
},
components: {
counter
},
methods: {
add() {
this.count++;
},
reduce() {
this.count--;
}
}
});
</script>
</body>
</html>
