Vue de Localstarage

HTML

              
                <section class="todoapp">
  <header class="header">
    <h1>やること</h1>
    <input class="new-todo"
      autofocus autocomplete="off"
      placeholder="なにする?"
      v-model="newTodo"
      @keyup.enter="addTodo">
  </header>
  <section class="main" v-show="todos.length" v-cloak>
    <input id="toggle-all" class="toggle-all" type="checkbox" v-model="allDone">
    <label for="toggle-all"></label>
    <ul class="todo-list">
      <li v-for="todo in filteredTodos"
        class="todo"
        :key="todo.id"
        :class="{ completed: todo.completed, editing: todo == editedTodo }">
        <div class="view">
          <input class="toggle" type="checkbox" v-model="todo.completed">
          <label @dblclick="editTodo(todo)">{{ todo.title }}</label>
          <button class="destroy" @click="removeTodo(todo)"></button>
        </div>
        <input class="edit" type="text"
          v-model="todo.title"
          v-todo-focus="todo == editedTodo"
          @blur="doneEdit(todo)"
          @keyup.enter="doneEdit(todo)"
          @keyup.esc="cancelEdit(todo)">
      </li>
    </ul>
  </section>
  <footer class="footer" v-show="todos.length" v-cloak>
    <span class="todo-count">
      <strong>{{ remaining }}</strong> {{ remaining | pluralize }} 未完了
    </span>
    <ul class="filters">
      <li><a href="#/all" :class="{ selected: visibility == 'all' }">すべて</a></li>
      <li><a href="#/active" :class="{ selected: visibility == 'active' }">未完了</a></li>
      <li><a href="#/completed" :class="{ selected: visibility == 'completed' }">完了済み</a></li>
    </ul>
    <button class="clear-completed" @click="removeCompleted" v-show="todos.length > remaining">
すべて削除
    </button>
  </footer>
</section>
<footer class="info">
  <p>Double-click to edit a todo</p>
  <p>Written by <a href="http://evanyou.me">Evan You</a></p>
  <p>Part of <a href="http://todomvc.com">TodoMVC</a></p>
</footer>

CSS

              
                /*マスタッシュの非表示設定*/
[v-cloak] { display: none; }


/*index.cssのスタイル設定*/
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: calc(100% - 43px);
	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;
	}
}

JS

              
                // Full spec-compliant TodoMVC with localStorage persistence
// and hash-based routing in ~120 effective lines of JavaScript.

// localStorage persistence
var STORAGE_KEY = 'todos-vuejs-2.0'
var todoStorage = {
  fetch: function () {
    var todos = JSON.parse(localStorage.getItem(STORAGE_KEY) || '[]')
    todos.forEach(function (todo, index) {
      todo.id = index
    })
    todoStorage.uid = todos.length
    return todos
  },
  save: function (todos) {
    localStorage.setItem(STORAGE_KEY, JSON.stringify(todos))
  }
}

// visibility filters
var filters = {
  all: function (todos) {
    return todos
  },
  active: function (todos) {
    return todos.filter(function (todo) {
      return !todo.completed
    })
  },
  completed: function (todos) {
    return todos.filter(function (todo) {
      return todo.completed
    })
  }
}

// app Vue instance
var app = new Vue({
  // app initial state
  data: {
    todos: todoStorage.fetch(),
    newTodo: '',
    editedTodo: null,
    visibility: 'all'
  },

  // watch todos change for localStorage persistence
  watch: {
    todos: {
      handler: function (todos) {
        todoStorage.save(todos)
      },
      deep: true
    }
  },

  // computed properties
  // http://vuejs.org/guide/computed.html
  computed: {
    filteredTodos: function () {
      return filters[this.visibility](this.todos)
    },
    remaining: function () {
      return filters.active(this.todos).length
    },
    allDone: {
      get: function () {
        return this.remaining === 0
      },
      set: function (value) {
        this.todos.forEach(function (todo) {
          todo.completed = value
        })
      }
    }
  },

  filters: {
    pluralize: function (n) {
      return n === 1 ? '件' : '件'
    }
  },

  // methods that implement data logic.
  // note there's no DOM manipulation here at all.
  methods: {
    addTodo: function () {
      var value = this.newTodo && this.newTodo.trim()
      if (!value) {
        return
      }
      this.todos.push({
        id: todoStorage.uid++,
        title: value,
        completed: false
      })
      this.newTodo = ''
    },

    removeTodo: function (todo) {
      this.todos.splice(this.todos.indexOf(todo), 1)
    },

    editTodo: function (todo) {
      this.beforeEditCache = todo.title
      this.editedTodo = todo
    },

    doneEdit: function (todo) {
      if (!this.editedTodo) {
        return
      }
      this.editedTodo = null
      todo.title = todo.title.trim()
      if (!todo.title) {
        this.removeTodo(todo)
      }
    },

    cancelEdit: function (todo) {
      this.editedTodo = null
      todo.title = this.beforeEditCache
    },

    removeCompleted: function () {
      this.todos = filters.active(this.todos)
    }
  },

  // a custom directive to wait for the DOM to be updated
  // before focusing on the input field.
  // http://vuejs.org/guide/custom-directive.html
  directives: {
    'todo-focus': function (el, binding) {
      if (binding.value) {
        el.focus()
      }
    }
  }
})

// handle routing
function onHashChange () {
  var visibility = window.location.hash.replace(/#\/?/, '')
  if (filters[visibility]) {
    app.visibility = visibility
  } else {
    window.location.hash = ''
    app.visibility = 'all'
  }
}

window.addEventListener('hashchange', onHashChange)
onHashChange()

// mount
app.$mount('.todoapp')

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