ケース・ベースhttp://todomvc.com/examples/vue/作成
完了機能:追加、ダブルクリック変更、ESCキーの編集解除、完了したすべてのタスクのクリア、すべてのタスクの選択、オートフォーカス、ローカル保存など、すべての機能を完了しました.
目次
1、index.html
2、app.js
3、index.css
4、効果
5、ソースのダウンロード
1、index.html

	
		
		
		
		
		
		
	
	
		

			

				
todos
				
			
			
			
		
		
		
		
		
	

2、app.js

;(function () {
	Vue.directive('focus', {
		//            DOM   ……
		inserted: function (el) {
			//     
			el.focus()
		}
	})
	window.app = new Vue({
		data: {
			todos: JSON.parse(window.localStorage.getItem('todos') || '[]'),
			currentEditing: null,
			filterText: 'all'
		},
		computed: {
			remainingCount() {
				return this.todos.filter(todo => !todo.completed).length
			},
			toggleAllStat: {
				get() {
					return this.todos.every(todos => todos.completed)
				},
				set() {
					const checked = !this.toggleAllStat;
					this.todos.forEach(item => {
						item.completed = checked;
					})
				}
			},
			filterTodos() {
				switch (this.filterText) {
					case 'active':
						return this.todos.filter(t => !t.completed);
						break
					case 'completed':
						return this.todos.filter(t => t.completed);
						break
					default:
						return this.todos;
				}

			}
		},
		watch: {
			todos: {
				handler(val, oldVal) {
					window.localStorage.setItem('todos', JSON.stringify(val))
				},
				deep: true,
			}
		},
		methods: {
			newTodoKeyDown(e) {
				const target = e.target;
				const value = target.value.trim();
				if (!value.length) {
					return
				}
				const todos = this.todos;
				todos.push({
					id: todos.length ? todos[todos.length - 1].id + 1 : 1,
					title: value,
					completed: false
				});
				target.value = '';
			},
			removeTodoClick(index, e) {
				this.todos.splice(index, 1);

			},
			getEditingDblclick(todo) {
				this.currentEditing = todo
			},
			saveEditKeydowm(todo, index, e) {
				const target = e.target;
				const value = target.value;
				if (!value.length) {
					return this.todos.splice(index, 1)
				} else {
					todo.title = value;
					this.currentEditing = null;
				}
			},
			cancelEditEsc() {
				this.currentEditing = null;

			},
			clearAllDoneClick() {
				for (let i = 0; i < this.todos.length; i++) {
					if (this.todos[i].completed) {
						this.todos.splice(i, 1);
						i--;
					}
				}
			},

		},
		directives: {
			'todo-focus'(el, binding) {
				if (binding.value) {
					el.focus()
				}
			},
		}
	}).$mount('#app');
	hashChange();

	window.onhashchange = hashChange;

	//hash    
	function hashChange(){
		app.filterText = window.location.hash.substr(2);
	}
})();

3、index.css

html,
body {
	margin: 0;
	padding: 0;
}

button {
	margin: 0;
	padding: 0;
	border: 0;
	background: none;
	font-size: 100%;
	vertical-align: baseline;
	font-family: inherit;
	font-weight: inherit;
	color: inherit;
	-webkit-appearance: none;
	appearance: none;
	-webkit-font-smoothing: antialiased;
	-moz-osx-font-smoothing: grayscale;
}

body {
	font: 14px 'Helvetica Neue', Helvetica, Arial, sans-serif;
	line-height: 1.4em;
	background: #f5f5f5;
	color: #4d4d4d;
	min-width: 230px;
	max-width: 550px;
	margin: 0 auto;
	-webkit-font-smoothing: antialiased;
	-moz-osx-font-smoothing: grayscale;
	font-weight: 300;
}

:focus {
	outline: 0;
}

.hidden {
	display: none;
}

.todoapp {
	background: #fff;
	margin: 130px 0 40px 0;
	position: relative;
	box-shadow: 0 2px 4px 0 rgba(0, 0, 0, 0.2),
	            0 25px 50px 0 rgba(0, 0, 0, 0.1);
}

.todoapp input::-webkit-input-placeholder {
	font-style: italic;
	font-weight: 300;
	color: #e6e6e6;
}

.todoapp input::-moz-placeholder {
	font-style: italic;
	font-weight: 300;
	color: #e6e6e6;
}

.todoapp input::input-placeholder {
	font-style: italic;
	font-weight: 300;
	color: #e6e6e6;
}

.todoapp h1 {
	position: absolute;
	top: -155px;
	width: 100%;
	font-size: 100px;
	font-weight: 100;
	text-align: center;
	color: rgba(175, 47, 47, 0.15);
	-webkit-text-rendering: optimizeLegibility;
	-moz-text-rendering: optimizeLegibility;
	text-rendering: optimizeLegibility;
}

.new-todo,
.edit {
	position: relative;
	margin: 0;
	width: 100%;
	font-size: 24px;
	font-family: inherit;
	font-weight: inherit;
	line-height: 1.4em;
	border: 0;
	color: inherit;
	padding: 6px;
	border: 1px solid #999;
	box-shadow: inset 0 -1px 5px 0 rgba(0, 0, 0, 0.2);
	box-sizing: border-box;
	-webkit-font-smoothing: antialiased;
	-moz-osx-font-smoothing: grayscale;
}

.new-todo {
	padding: 16px 16px 16px 60px;
	border: none;
	background: rgba(0, 0, 0, 0.003);
	box-shadow: inset 0 -2px 1px rgba(0,0,0,0.03);
}

.main {
	position: relative;
	z-index: 2;
	border-top: 1px solid #e6e6e6;
}

.toggle-all {
	width: 1px;
	height: 1px;
	border: none; /* Mobile Safari */
	opacity: 0;
	position: absolute;
	right: 100%;
	bottom: 100%;
}

.toggle-all + label {
	width: 60px;
	height: 34px;
	font-size: 0;
	position: absolute;
	top: -52px;
	left: -13px;
	-webkit-transform: rotate(90deg);
	transform: rotate(90deg);
}

.toggle-all + label:before {
	content: '❯';
	font-size: 22px;
	color: #e6e6e6;
	padding: 10px 27px 10px 27px;
}

.toggle-all:checked + label:before {
	color: #737373;
}

.todo-list {
	margin: 0;
	padding: 0;
	list-style: none;
}

.todo-list li {
	position: relative;
	font-size: 24px;
	border-bottom: 1px solid #ededed;
}

.todo-list li:last-child {
	border-bottom: none;
}

.todo-list li.editing {
	border-bottom: none;
	padding: 0;
}

.todo-list li.editing .edit {
	display: block;
	width: 506px;
	padding: 12px 16px;
	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: 0;
	bottom: 0;
	margin: auto 0;
	border: none; /* Mobile Safari */
	-webkit-appearance: none;
	appearance: none;
}

.todo-list li .toggle {
	opacity: 0;
}

.todo-list li .toggle + label {
	/*
		Firefox requires `#` to be escaped - https://bugzilla.mozilla.org/show_bug.cgi?id=922433
		IE and Edge requires *everything* to be escaped to render, so we do that instead of just the `#` - https://developer.microsoft.com/en-us/microsoft-edge/platform/issues/7157459/
	*/
	background-image: url('data:image/svg+xml;utf8,%3Csvg%20xmlns%3D%22http%3A//www.w3.org/2000/svg%22%20width%3D%2240%22%20height%3D%2240%22%20viewBox%3D%22-10%20-18%20100%20135%22%3E%3Ccircle%20cx%3D%2250%22%20cy%3D%2250%22%20r%3D%2250%22%20fill%3D%22none%22%20stroke%3D%22%23ededed%22%20stroke-width%3D%223%22/%3E%3C/svg%3E');
	background-repeat: no-repeat;
	background-position: center left;
}

.todo-list li .toggle:checked + label {
	background-image: url('data:image/svg+xml;utf8,%3Csvg%20xmlns%3D%22http%3A//www.w3.org/2000/svg%22%20width%3D%2240%22%20height%3D%2240%22%20viewBox%3D%22-10%20-18%20100%20135%22%3E%3Ccircle%20cx%3D%2250%22%20cy%3D%2250%22%20r%3D%2250%22%20fill%3D%22none%22%20stroke%3D%22%23bddad5%22%20stroke-width%3D%223%22/%3E%3Cpath%20fill%3D%22%235dc2af%22%20d%3D%22M72%2025L42%2071%2027%2056l-4%204%2020%2020%2034-52z%22/%3E%3C/svg%3E');
}

.todo-list li label {
	word-break: break-all;
	padding: 15px 15px 15px 60px;
	display: block;
	line-height: 1.2;
	transition: color 0.4s;
}

.todo-list li.completed label {
	color: #d9d9d9;
	text-decoration: line-through;
}

.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;
}

.footer {
	color: #777;
	padding: 10px 15px;
	height: 20px;
	text-align: center;
	border-top: 1px solid #e6e6e6;
}

.footer:before {
	content: '';
	position: absolute;
	right: 0;
	bottom: 0;
	left: 0;
	height: 50px;
	overflow: hidden;
	box-shadow: 0 1px 1px rgba(0, 0, 0, 0.2),
	            0 8px 0 -3px #f6f6f6,
	            0 9px 1px -3px rgba(0, 0, 0, 0.2),
	            0 16px 0 -6px #f6f6f6,
	            0 17px 2px -6px rgba(0, 0, 0, 0.2);
}

.todo-count {
	float: left;
	text-align: left;
}

.todo-count strong {
	font-weight: 300;
}

.filters {
	margin: 0;
	padding: 0;
	list-style: none;
	position: absolute;
	right: 0;
	left: 0;
}

.filters li {
	display: inline;
}

.filters li a {
	color: inherit;
	margin: 3px;
	padding: 3px 7px;
	text-decoration: none;
	border: 1px solid transparent;
	border-radius: 3px;
}

.filters li a:hover {
	border-color: rgba(175, 47, 47, 0.1);
}

.filters li a.selected {
	border-color: rgba(175, 47, 47, 0.2);
}

.clear-completed,
html .clear-completed:active {
	float: right;
	position: relative;
	line-height: 20px;
	text-decoration: none;
	cursor: pointer;
}

.clear-completed:hover {
	text-decoration: underline;
}

.info {
	margin: 65px auto 0;
	color: #bfbfbf;
	font-size: 10px;
	text-shadow: 0 1px 0 rgba(255, 255, 255, 0.5);
	text-align: center;
}

.info p {
	line-height: 1;
}

.info a {
	color: inherit;
	text-decoration: none;
	font-weight: 400;
}

.info a:hover {
	text-decoration: underline;
}

/*
	Hack to remove background from Mobile Safari.
	Can't use it globally since it destroys checkboxes in Firefox
*/
@media screen and (-webkit-min-device-pixel-ratio:0) {
	.toggle-all,
	.todo-list li .toggle {
		background: none;
	}

	.todo-list li .toggle {
		height: 40px;
	}
}

@media (max-width: 430px) {
	.footer {
		height: 50px;
	}

	.filters {
		bottom: 10px;
	}
}

4、
 

5、ソースのダウンロード
https://download.csdn.net/download/litongzero/10648417