<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>test</title>
<script src="https://unpkg.com/vue@next"></script>
</head>
<body>
<div id="root">
<counter :count="count" @add="handleAdd"></counter>
</div>
</body>
<script>
const app = Vue.createApp({
data() {
return {
count: 1,
}
},
methods: {
handleAdd(param) {
this.count = this.count + param
}
},
});
app.component('counter', {
props: ['count'],
methods: {
handleClick() {
console.log('handleClick');
this.$emit('add', 1)
}
},
template: `
<div @click="handleClick">{{count}}</div>
`
});
const vm = app.mount('#root');
</script>
</html>
vue組件：父子組件通過事件相互通信
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