代碼
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<!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>
</head>
<body>
<div id="app">
<div> 我是： {{ name }}，我的今年：{{ age }}</div>
<div>{{countPlusAge}}</div>
</div>
</body>
<script src="https://unpkg.com/vue/dist/vue.js"></script>
<script src="https://unpkg.com/[email protected]/dist/vuex.js"></script>
<script type="text/javascript">
const store = new Vuex.Store({
state: {
name: '句號',
age: 18
}
})
var vm = new Vue({
el: '#app',
store,
data() {
return {
count: 1
}
},
computed: Vuex.mapState({
// 箭頭函數可使代碼更簡練
name: state => state.name,
// 傳字符串參數 'age' 等同于 `state => state.age`
age: 'age',
// 為了能夠使用 `this` 獲取局部狀態，必須使用常規函數
countPlusAge (state) {
return state.age + this.count
}
})
})
</script>
</html>
運行結果