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vue_stu
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36-vuex-getters.html

<!doctype html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport"
          content="width=device-width, user-scalable=no, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Document</title>
    <script src="node_modules/vue/dist/vue.js"></script>
    <script src="node_modules/vuex/dist/vuex.min.js"></script>

</head>
<body>
<div id="app">
    <h2>列表查询</h2>
    <!--双向绑定id-->
    <input type="text" v-model="id">
    <button @click="search">搜索</button>
    <p>搜索结果：{{this.$store.getters.search}}</p>
    <ul>
        <li v-for="item in this.$store.state.todos">{{item}}</li>
    </ul>

</div>
<script>

    const store = new Vuex.Store({
        state: {
            todos: [
                {id: 1, text: "文本信息"},
                {id: 2, text: "文本信息"}
            ],
            id: 0
        },
        mutations: {
            search(state, id) {
                //接收传过来的数据；然后赋值给id
                state.id = id
            }
        },
        getters: {
            search: state => {
                //显示state中id等于里表中的id的数据
                return state.todos.filter(todo => todo.id == state.id)
            }
        }
    })
    var vm = new Vue({
        el: "#app",
        data: {
            id: ""
        },
        store,
        methods: {
            search() {
                //将id提交到store中的search方法中
                this.$store.commit("search", this.id)

            }
        }


    })
</script>

</body>
</html>