妙V课堂 Vue课程“年终任务列表案例”

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妙V课堂 Vue课程“年终任务列表案例”

demo演示

技术分享

html结构

<!DOCTYPE html>  
<html lang="en">  
<head>  
    <meta charset="UTF-8">  
    <title>ToDoList</title>  
    <link rel="stylesheet" type="text/css" href="./css/index.css">  
    <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 class="main">  
        <h3 class="big-title">添加任务：</h3>  
        <input type="text" 
        checked="" placehoder="例如：吃饭睡觉打豆豆；提示：+回车即可添加任务" class="task-input"
        v-model="todo"
        v-on:keyup.enter="addTodo"
         />  
        <ul class="task-content" v-show="list.length">  
            <li>
            {{noCheckeLength}}个任务未完成  
            </li>  
            <li class="action">  
                <a class="active" href="#all">所有任务</a>  
                <a href="#unfinished">未完成的任务</a>  
                <a href="#finished">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="!list.length">还没有添加任何任务</span>  
        <ul class="todo-list">  
            <li class="todo" v-for="item in filteredList" :class="{completed:item.isChecded,editing:item===edtorTodos}" >
                <div class="view">  
                    <input type="checkbox" v-model="item.isChecded" class="toggle" >  
                    <label @dblclick="edtorTodo(item)">{{item.title}}</label>  
                    <button class="destroy" @click="deleteTodo(item)"></button>  
                </div>  
                <input  
                type="text"   
                class="edit" 
                v-model="item.title"
                v-focus="edtorTodos === item" 
                @blur="edtorTodoed(item)"
                @keyup.enter="edtorTodoed(item)"
                @keyup.esc="cancelTodo(item)"
                />  
            </li>  
        </ul>  
        </div>  
    </div>  
  
    <script src="./js/app.js"></script>  
</body>  
</html>

js代码

/*var list =[
    {
        title:‘吃饭打豆豆‘,
        isChecded:false //不选中
    },
    {
        title:‘吃饭打豆豆‘,
        isChecded:true //选中
    }
]*/
//存取localStorage中的数据
var store ={
    save(key,value){
        localStorage.setItem(key,JSON.stringify(value));
    },
    fetch(key){
        return JSON.parse(localStorage.getItem(key)) || [];
    }
}

var list = store.fetch(‘miaov-new-class‘);

//过滤的时候有三种情况 all finished unfinished
var filter = {
    all:function(list){
        return list;
    },
    finished:function(list){
        return list.filter(function(item){
            return item.isChecded;
        });
    },
    unfinished:function(list){
        return list.filter(function(item){
            return !item.isChecded;
        });
    }
}

var vm = new Vue({
    el:‘.main‘,
    data:{
        list:list,
        todo:‘‘,
        edtorTodos:‘‘,
        beforeTitle:‘‘,//记录编辑时的title
        visibility:‘all‘//通过属性值变化进行赛选
    },
    watch:{
        /*list:function(){//监控list这个属性，当这个属性发生变化就会触发这个函数
            store.save(‘miaov-new-class‘,this.list);
        }*/
        list:{
            handler:function(){
                store.save(‘miaov-new-class‘,this.list);
            },
            deep:true
        }
    },
    computed:{
        // 过滤属性
        noCheckeLength:function(){
            return this.list.filter(function(item){
                    return !item.isChecded
                }).length
        },
        filteredList:function(){
            //找到过滤函数，就返回过滤后的数据，如果没有就返回所有数据
            return filter[this.visibility]?filter[this.visibility](list):list;
        }
    },
    methods:{
        addTodo:function () {//添加任务
            // 向list中添加一项任务
            this.list.push({
                title:this.todo,
                isChecded:false
            });
        },
        deleteTodo(todo){//删除任务
            var index = this.list.indexOf(todo);
            this.list.splice(index,1);
        },
        edtorTodo(todo){//编辑任务
            //编辑任务的时候记录下编辑这条任务的title，方便在取消的时候从新赋值给取消时的title
            this.beforeTitle = todo.title;
            this.edtorTodos = todo;
        },
        edtorTodoed(todo){
            this.edtorTodos=‘‘
        },
        cancelTodo(todo){//取消编辑任务
            todo.title = this.beforeTitle;
            this.edtorTodos=‘‘
        }
    },
    directives:{//自定义指令
        focus:{
            update(el,binding){
                if(binding.value){
                    el.focus();
                }
            }
        }
    }
});

function watchHashChange(){
    var hash = window.location.hash.slice(1);
    vm.visibility = hash;
}

window.addEventListener(‘hashchange‘,watchHashChange);

css代码

body {  
    margin:0;  
    background-color: #fafafa;  
    font: 14px ‘Helvetica Neue‘, Helvetica, Arial, sans-serif;  
}  
  
h2{  
    margin:0;  
    font-size: 12px;  
}  
a {  
    color: #000;  
    text-decoration: none;  
}  
  
input {  
    outline: 0;  
}  
  
button {  
    margin: 0;  
    padding: 0;  
    border: 0;  
    background: none;  
    font-size: 100%;  
    vertical-align: baseline;  
    font-family: inherit;  
    font-weight: inherit;  
    color: inherit;  
    outline: 0;  
}  
  
ul {  
    padding:0;  
    margin:0;  
    list-style: none;  
}  
  
.page-top {  
    width: 100%;  
    height: 40px;  
    background-color: #db4c3f;  
}  
  
.page-content {  
    width: 50%;  
    margin: 0px auto;  
}  
  
.page-content h2{  
    line-height: 40px;  
    font-size: 18px;  
    color: #fff;  
}  
  
.main {  
    width: 50%;  
    margin: 0px auto;  
    box-sizing:border-box;  
}  
  
.task-input {  
    width: 99%;  
    height:30px;  
    outline: 0;  
    border: 1px solid #ccc;  
}  
  
.task-count{  
    display: flex;  
    margin:10px 0;  
}  
  
.task-count li {  
    padding-left: 10px;  
    flex: 1;  
    color: #dd4b39;  
}  
  
.task-count li:nth-child(1){  
    padding: 5px 0 0 10px;  
}  
  
.action {  
    text-align: center;  
    display: flex;  
}  
.action a {  
    margin: 0px 10px;  
    flex: 1;  
    padding: 5px 0;  
    color: #777;  
  
}  
  
.action a:nth-child(3){  
    margin-right: 0;  
}  
  
.active {  
    border: 1px solid rgba(175, 47, 47, 0.2);  
}  
  
.tasks {  
    background-color: #fff;  
}  
.no-task-tip {  
    padding:10px 0 10px 10px;  
    display: block;  
    border-bottom: 1px solid #ededed;  
    color:#777;  
}  
  
.big-title {  
    color: #222;  
}  
  
  
.todo-list {  
    margin: 0;  
    padding: 0;  
    list-style: none;  
}  
  
.todo-list li {  
    position: relative;  
    font-size: 16px;  
    border-bottom: 1px solid #ededed;  
}  
  
.todo-list li:hover {  
    background-color: #fafafa;  
}  
  
  
.todo-list li.editing {  
    border-bottom: none;  
    padding: 0;  
}  
  
.todo-list li.editing .edit {  
    display: block;  
    width: 506px;  
    padding: 13px 17px 12px 17px;  
    margin: 0 0 0 43px;  
}  
  
.todo-list li.editing .view {  
    display: none;  
}  
  
.todo-list li .toggle {  
    text-align: center;  
    width: 40px;  
    /* auto, since non-WebKit browsers doesn‘t support input styling */  
    height: auto;  
    position: absolute;  
    top: 5px;  
    bottom: 0;  
    margin: auto 0;  
    border: none; /* Mobile Safari */  
    -webkit-appearance: none;  
    appearance: none;  
}  
  
.toggle {  
    text-align: center;  
    width: 40px;  
    /* auto, since non-WebKit browsers doesn‘t support input styling */  
    height: auto;  
    position: absolute;  
    top: 5px;  
    bottom: 0;  
    margin: auto 0;  
    border: none; /* Mobile Safari */  
    -webkit-appearance: none;  
    appearance: none;  
}  
  
 .toggle:after {  
    content: url(‘data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" width="40" height="40" viewBox="-10 -18 100 135"><circle cx="50" cy="50" r="40" fill="none" stroke="#ededed" stroke-width="3"/></svg>‘);  
}  
  
.toggle:checked:after {  
    content: url(‘data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" width="40" height="40" viewBox="-10 -18 100 135"><circle cx="50" cy="50" r="40" fill="none" stroke="#bddad5" stroke-width="3"/><path fill="#5dc2af" d="M72 25L42 71 27 56l-4 4 20 20 34-52z"/></svg>‘);  
}  
  
.todo-list li label {  
    white-space: pre-line;  
    word-break: break-all;  
    padding: 15px 60px 15px 15px;  
    margin-left: 45px;  
    display: block;  
    line-height: 1.2;  
    transition: color 0.4s;  
}  
  
.todo-list li.completed label {  
    color: #d9d9d9;  
    text-decoration: line-through;  
}  
  
/*.tip-toggle { 
    padding-left: 0; 
    position: relative; 
} 
 
.tip-toggle .toggle { 
    top: -2px; 
} 
 
.tip-toggle span { 
    margin-left: 45px; 
}*/  
  
.todo-list li .destroy {  
    display: none;  
    position: absolute;  
    top: 0;  
    right: 10px;  
    bottom: 0;  
    width: 40px;  
    height: 40px;  
    margin: auto 0;  
    font-size: 30px;  
    color: #cc9a9a;  
    margin-bottom: 11px;  
    transition: color 0.2s ease-out;  
}  
  
.todo-list li .destroy:hover {  
    color: #af5b5e;  
}  
  
.todo-list li .destroy:after {  
    content: ‘ב;  
}  
  
.todo-list li:hover .destroy {  
    display: block;  
}  
  
.todo-list li .edit {  
    display: none;  
}  
  
.todo-list li.editing:last-child {  
    margin-bottom: -1px;  
}

 

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