Vue.js Todo List应用实战-优快云博客

本文链接：https://blog.youkuaiyun.com/github_35035906/article/details/70249829

【IMWeb训练营作业】vue todoList

7组 - kangkai

demo展示

demo: http://kangkai-fe.github.io/demo/vue/todo-list/
github: https://github.com/KangKai-fe/demo/tree/master/IMWeb/vue/todo-list

html 代码

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>vue todo list</title>
    <link rel="stylesheet" href="./css/index.css">
    <!-- 引入vue-core -->
    <script src="./js/vue.js"></script>
</head>
<body>
    <div class="page-top">
        <div class="page-content">
            <h2>任务计划列表</h2>
        </div>
    </div>
    <div id="app" class="main">
        <h3 class="big-title">添加任务：</h3>
        <input
            placeholder="请输入计划任务; 提示: 按回车即可添加任务"
            class="task-input"
            type="text"
            v-model="itemToAdd"
            @keyup.enter="addItem"
        />
        <ul class="task-count" v-show="filteredList.length">
            <li>{{ uncheckedCount }}个任务未完成</li>
            <li class="action">
                <a href="#"
                   :class="{
                       active: (currentHash === (''))
                   }"
                >所有任务</a>
                <a href="#unchecked"
                   :class="{
                       active: currentHash === 'unchecked'
                   }"
                >未完成的任务</a>
                <a href="#checked"
                   :class="{
                       active: currentHash === 'checked'
                   }"
                >完成的任务</a>
            </li>
        </ul>
        <h3 class="big-title">任务列表：</h3>
        <div class="tasks">
            <span class="no-task-tip"
                  v-show="!filteredList.length"
            >还没有添加任何任务</span>
            <ul class="todo-list">
                <li class="todo"
                    :class="{
                        completed: item.checked,
                        editing: index === indexBeingEdited
                    }"
                    v-for="(item, index) in filteredList"
                >
                    <div class="view">
                        <input class="toggle"
                               type="checkbox"
                               v-model="item.checked"
                        />
                        <label @dblclick="editItem(item, index)">{{ item.content }}</label>
                        <button class="destroy"
                                @click="deleteItem(index)"
                        ></button>
                    </div>
                    <input
                        v-focus="index === indexBeingEdited"
                        class="edit"
                        type="text"
                        v-model="item.content"
                        @blur="saveEditing()"
                        @keyup.13="saveEditing()"
                        @keyup.esc="cancelEditing(item)"
                    />
                </li>
            </ul>
        </div>
    </div>
    <script src="./js/app.js"></script>
</body>
</html>

javascript 代码

// localStorage for data
var storage = {
    set(key, value) {
        localStorage.setItem(key, JSON.stringify(value));
    },
    get(key) {
        return JSON.parse(localStorage.getItem(key)) || [];
    }
}

// mock data
var todoList = [
    {
        content: 'vue',
        checked: true
    }, {
        content: 'vue-router',
        checked: false
    }, {
        content: 'vuex',
        checked: false
    }, {
        content: 'axios',
        checked: false
    }
]

// initializing
var vm = new Vue({
    el: '#app',
    data: {
        list: storage.get('todoList'),
        itemToAdd: '',
        indexBeingEdited: -1,
        contentBeingEdited: '',
        currentHash: ''
    },
    computed: {
        uncheckedCount: function () {
            return this.list.filter(item => !item.checked).length;
        },
        filteredList: function() {
            switch (this.currentHash) {
                case 'checked':
                    return this.list.filter(item => item.checked);
                    break;
                case 'unchecked':
                    return this.list.filter(item=>!item.checked);
                    break;
                default:
                    return this.list;
            }
        }
    },
    watch: {
        list: {
            handler: function() {
                storage.set('todoList', this.list);
            },
            deep: true // 监听数组内部值的变化
        }
    },
    methods: {
        addItem() {
            this.list.push({
                content: this.itemToAdd,
                checked: false
            });
            this.itemToAdd = '';
        },
        deleteItem(index) {
            this.list.splice(index, 1);
        },
        editItem(item, index) {
            this.indexBeingEdited = index;
            this.contentBeingEdited = item.content;
        },
        saveEditing() {
            this.indexBeingEdited = -1;
            this.contentBeingEdited = '';
        },
        cancelEditing(item) {
            item.content = this.contentBeingEdited;
            this.indexBeingEdited = -1;
            this.contentBeingEdited = '';
        }
    },
    directives: {
        focus: {
            update(el, binding) {
                if (binding.value) {
                    el.focus();
                }
            }
        }
    }
});

// handle hashchange event
function hashChangeHandler() {
    vm.currentHash = window.location.hash.slice(1);
    console.log(vm.currentHash)
}

hashChangeHandler();

// watch hashchange event
window.addEventListener('hashchange', hashChangeHandler);