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HTML 

              
                <div class="wrapper">
        <div class="inner_wrapper clearfix">
            <div class="main" id="main_body">
                <h1 class="title">ToDos</h1>
                <input type="text" placeholder="what needs to be done?" name="input_item" class="input_text" v-model="message" v-on:keyup.13="createTodo" />
                <div id="checkAll">
                    <input type="checkbox" name="choose_all" v-model="allChecked" v-on:change="checkAll"/>
                    <label class="with_cbx">Mark all as complete</label>
                </div>
                <div id="item_lists">
                    <div class='user_choice_item' v-for="todo in todos"
					  @mouseenter="showDeleteBtn($index,$event)"
                     v-on:mouseleave.self="hideDeleteBtn($index,$event)"
                    @dblclick="changeToEdit($index)">
                        <input type='checkbox' name='item_cbx' v-model="todo.checked" />
                        <label class='with_cbx_item' v-if="todo.noEdit">{{todo.content}}</label>
                        <input type="text" class="with_cbx_dbl"
                        		v-model="todo.tempMsg" v-else
                        		:value ="todo.content"
                        		@keyup.13="doneEdit($index)"
                        		@blur="doneEdit($index)"
                        />

                        <span class='delete_bt'  v-on:click.stop="deleteTodo(todo)" v-show="todo.show"></span>
                    </div>
                </div>
            </div>
            <div id="bottom" class="clearfix"  v-show="showBottom">
                <div class="float_left user_choices" >
                    <!-- 				<input type="checkbox" value=""/> -->
                    <label class="with_cbx" >
                        {{selectedNum}} items selected
                    </label>

                </div>
                <input class="delete_items  float_right" type="button" value="删除" v-on:click="deleteSelected"/>

            </div>
        </div>
    </div>
!

CSS 

              
                /***************************************
	        reset style
***************************************/
body,ul,li,div,img,span,input{margin: 0;padding: 0;font: 14px "Microsoft Yahei","微软雅黑",sans-serif}

input{border: medium none;outline: none;vertical-align: middle;}
label{vertical-align: middle;}
li{list-style-type: none;}
img{border: none;}
a{text-decoration: none;cursor: pointer;color: black}
.clearfix:after{content:"";display: block;clear: both;}
/*.clearfix{overflow:hidden;}*/

.float_left{float: left;}
.float_right{float: right;}
.focus{border:2px blue solid;}

.hide{display: none;}
label.with_cbx,label.with_cbx_item{margin-left: 6px;color: white;font-weight: bold;}
input.with_cbx_dbl{background:white;color:#44c2ec;margin-left: 6px;display: inline-block;font-weight: bold;
padding: 4px 8px;
width: 75%;}

/***************************************
	        custom style
***************************************/
body,html{
	height: 100%;
}
.wrapper
{
	width: 380px;
	min-height: 250px;                    /*待修改*/
  background-color:rgb(87, 196, 200);
/* 	background:url(image/background.png) no-repeat; */
	background-size: cover;
	margin: 100px auto;

}
.inner_wrapper
{
	margin: 0 20px;
	/*border: 1px white solid;*/
	height: 100%;
	padding-top: 30px;
	position: relative;
}
#bottom
{
	/*position: absolute;             放弃绝对定位*/
	bottom: 0;
	left: 0;
	height: 40px;
	width: 334px;
	/*margin-top: 20px;*/
	/*background-color: rgba(255,255,255,0.8);*/
	padding-left: 6px;
/*	line-height: 40px;*/
}

h1
{
	color: white;
	text-align: center;
}
#main_body .input_text
{
	width: 330px;
	line-height: 40px;
	padding-left: 10px;
	background: white;
	color: rgba(0,0,0,0.5);
	margin-top: 20px;
}
#checkAll,.user_choice_item
{
	margin-top: 15px;
	vertical-align: middle;
	padding-left:6px;
	line-height: 40px;
}

#item_lists
{
	/*margin-top: 15px;*/
	width:340px;

}
.user_choice_item{
	margin-top:0;
	border-bottom:1px solid #c1c4c5;
	width: 334px;
	position: relative;
}
/*.user_choice_item span{margin-left: 20px;vertical-align: middle;}*/
.delete_bt
{
	background: url(http://i2.buimg.com/567571/4f15c12525ec98bd.png) left center no-repeat;
	width: 16px;
	height: 16px;
	position: absolute;    /*加上位置*/
	right: 15px;
	top:50%;
	margin-top: -7px;
	cursor: pointer;

}


#bottom>div{line-height: 40px;}
#bottom .delete_items
{
	padding: 4px 6px;
	margin-top: 6px;
	background: #7a9777;
	color: white;
	padding-left: 6px;
	cursor: pointer;
	position: absolute;
	vertical-align: middle;
	right: 30px;

}
!

JS 

              
                /**
* Q：mouseover的时候执行多次
*/

(function(){

	var todoList = new Vue({
		el:"#item_lists",
		data:{
			todos:[],
		},
		methods:{
			showDeleteBtn:function(index,event){
				event.stopPropagation();
				if(event.currentTarget.className!=="user_choice_item")
					return;

				this.todos[index].show = true;
			},
			hideDeleteBtn:function(index,event){
				this.todos[index].show = false;

			},
			deleteTodo:function(todo){

				this.todos.$remove(todo);
				return false;
			},
			changeToEdit:function(index){
				this.todos[index].noEdit = false;
				this.todos[index].show = false;

			},
			doneEdit:function(index){
				var tempMsg = this.todos[index].tempMsg;
				this.todos[index].content = tempMsg;
				this.todos[index].noEdit = true;
			}



		}
	});

	var checkAllInput = new Vue({
		el:"#checkAll",
		computed:{
			allChecked:{
				get:function(){
					return todoList.todos.length>0 && todoList.todos.every(function(todo){
						return todo.checked;
					});
				},
				set:function(value){

					todoList.todos.forEach(function(todo,index){
						todo.checked = value;
					});

				}
			}
		}
	});

	var bottom = new Vue({
		el:"#bottom",
		computed:{
			selectedNum:function(){
				return todoList.todos.filter(function(todo){
							return todo.checked;
						}).length
			},
			showBottom:function(){
				return this.selectedNum>0?true:false
			},
		},
		methods:{
			getSelectedItems:function(){
				return todoList.todos.filter(function(todo){
					return todo.checked;
				});
			},
			deleteSelected:function(){
				this.getSelectedItems().forEach(function(todo){
					todoList.todos.$remove(todo);
				})
			}
		}
	})


	var todoInput = new Vue({
		el:".input_text",
		data:{
			message:""
		},
		methods:{
			createTodo:function(event){
				var value = createDefaultTodo(this.message);
				todoList.todos.push(value);
				this.message = "";

			}
		}
	});


	function createDefaultTodo(value){
		return {
			content:value,
			checked:false,
			show:false,
			noEdit:true
		}
	}


})();
!
999px

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