代码
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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 v-for="item in skillList" :key="item.name">{{item.name}}</div>
<div>我有 {{skillCount}} 个技能包</div>
</div>
</body>
<script src="https://unpkg.com/vue/dist/vue.js"></script>
<script src="https://unpkg.com/vuex@3.1.2/dist/vuex.js"></script>
<script type="text/javascript">
const store = new Vuex.Store({
state: {
name: '句号',
age: 18,
skill: [
{name: 'Vue', type: 1},
{name: 'React', type: 1},
{name: 'JAVA', type: 2},
{name: 'Webpack', type: 3},
{name: 'Node', type: 1}
]
},
getters: {
skillList: state => {
return state.skill.filter(item => item.type === 1)
},
skillCount: (state, getters) => {
return getters.skillList.length
},
}
})
var vm = new Vue({
el: '#app',
store,
computed: {
...Vuex.mapGetters([
'skillList',
'skillCount'
])
}
})
</script>
</html>
运行结果