【IMWeb训练营作业】用Vue做任务列表To do list

效果：

以下是html代码：

	
	
	
	


	

		

			
任务计划列表
		
	
	

		
添加任务：
		
		

			

				{{noCheckedItem}}个任务未完成
			
			

				所有任务
				未完成的任务
				完成的任务
			
		
		
任务列表：
		

		还没有添加任何任务
		

			

				

					
					{{item.title}}
					
				
				
			
		
		
	

	

以下是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,');
}

.toggle:checked:after {
    content: url('data:image/svg+xml;utf8,');
}

.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: '×';
}

.todo-list li:hover .destroy {
    display: block;
}

.todo-list li .edit {
    display: none;
}

.todo-list li.editing:last-child {
    margin-bottom: -1px;
}

以下是Vue代码：

//存取localStorage中的数据（通过封装一个方法）
var store = {
	save(key,value){
		localStorage.setItem(key,JSON.stringify(value));
	},
	fetch(key){
		return JSON.parse(localStorage.getItem(key)) || [];
	}
}
//数据
//去除所有的值
var list = store.fetch("todolist-class");//从缓存中调用数据
/*var list = [{
		title:"吃饭打豆豆",
		isChecked:false //状态为false，为不选中  任务未完成
	},
	{
		title:"妙味课堂",
		isChecked:true   //状态为true，为选中    任务完成
	}];*/

//vm
var vm = new Vue({
	el:".main",
	data:{
		list:list,
		todo:'',
		edtorTodos:'',//记录正在编辑的数据
		beforeTitle:'',//记录正在编辑的数据的title
		visibility:"all"//通过这个属性值的变化，结合hash对数据进行筛选，默认值是all
	},
	watch:{
		/*list:function(){//监控list这个属性，当这个属性对应的值发生变化就会执行函数
			store.save("todolist-class",this.list);//浅监控，监控不到list里面各个对象中属性的变化
		}*/

		list:{//这里list是个对象
			handler:function(){
				store.save("todolist-class",this.list);
			},
			deep:true //深度监控
		}
	},
	computed:{
		noCheckedItem:function(){
			return this.list.filter(function(item){
						return item.isChecked === false;
				}).length;
		},
		filteredList:function(){//根据vm的visibility属性来过滤数据
			//按三种情况过滤：all,finished,unfinished
			var filter = {
				all:function(){
					return list;
				},
				finished:function(){
					return list.filter(function(item){
						return item.isChecked;
					})
				},
				unfinished:function(){
					return list.filter(function(item){
						return !item.isChecked;
					})
				}
			}//end filter
			//考虑到手工改动url栏里hash值的情况，这里加入了判断：找到了过滤函数，就返回过滤后的数据，否则返回所有的数据
			return filter[this.visibility] ? filter[this.visibility](list) : list;//这里写上(list)才能返回根据数据筛选的值
		}
	},
	methods:{
		addTodo(){//添加任务
			/*{
				title:
			}*/
				this.list.push({//往数组里添加任务，格式是个对象
					title:this.todo,//事件处理函数中的this指向的是，当前这个根实例，即new Vue
					isChecked:false
				}); 
				this.todo = '';
		},

		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，记录一下编辑这条任务的title，方便在取消编辑的时候还能用到原来的title，写在数据中：beforeTitle
			
			this.beforeTitle = todo.title;
			this.edtorTodos = todo;
		},

		edtorTodoed(todo){//编辑完成后失去焦点
			this.edtorTodos = '';
		},

		cancelTodo(todo){//取消编辑
			todo.title = this.beforeTitle;
			this.edtorTodoed(todo);
			this.beforeTitle = '';//之前记录的值已经没用了，重新设为空
		}
	},//end methods
		directives:{//自定义指令
			"foucs":{
				update(el,binding){//钩子函数
					//console.log(el);
					//console.log(binding);
					if(binding.value){
						el.focus();
					}
				}
			}//end focus
		}//end directives	
});

function watchHashChange(){
	var hash = window.location.hash.slice(1);//去掉#号
	vm.visibility = hash;//拿到去了#的hash值后改变实例的visibility属性值
}

watchHashChange();//一开始调用一下

window.addEventListener("hashchange",watchHashChange);//hash改变时调用一下