Vue.js TodoList案例
阿新 • • 發佈：2018-12-22
案例根據 http://todomvc.com/examples/vue/ 編寫
完成功能：完成了所有的功能，如：新增、雙擊修改、ESC鍵取消編輯、清除所有已完成任務、一鍵全選任務、自動聚焦，本地儲存等等。
目錄
1、index.html
<!doctype html> <html lang="en"> <head> <meta charset="utf-8"> <meta name="viewport" content="width=device-width, initial-scale=1"> <title>Template • TodoMVC</title> <link rel="stylesheet" href="node_modules/todomvc-app-css/index.css"> <!-- CSS overrides - remove if you don't need it --> <link rel="stylesheet" href="css/app.css"> </head> <body> <section class="todoapp" id="app"> <header class="header"> <h1>todos</h1> <input class="new-todo" v-focus autocomplete="off" @keydown.enter="newTodoKeyDown" placeholder="What needs to be done?" > </header> <!-- This section should be hidden by default and shown when there are todos --> <template v-if="todos.length"> <section class="main"> <input v-todo-focus id="toggle-all" class="toggle-all" type="checkbox" v-model="toggleAllStat" > <label for="toggle-all">Mark all as complete</label> <ul class="todo-list"> <li :class="{ completed: item.completed, editing: currentEditing === item }" v-for="(item, index) in filterTodos" > <div class="view"> <input class="toggle" v-model="item.completed" type="checkbox"> <label @dblclick="getEditingDblclick(item)" >{{item.title}}</label> <button class="destroy" @click="removeTodoClick(index,$event)"></button> </div> <input class="edit" :value=item.title v-todo-focus="item == currentEditing" @keydown.enter="saveEditKeydowm(item,index,$event)" @keydown.esc="cancelEditEsc" @blur="saveEditKeydowm(item,index,$event)" > </li> </ul> </section> <!-- This footer should hidden by default and shown when there are todos --> <footer class="footer"> <!-- This should be `0 items left` by default --> <span class="todo-count"><strong>{{remainingCount}}</strong> item left</span> <!-- Remove this if you don't implement routing --> <ul class="filters"> <li> <a :class="{selected:filterText===''}" href="#/">All</a> </li> <li> <a :class="{selected:filterText==='active'}" href="#/active">Active</a> </li> <li> <a :class="{selected:filterText==='completed'}" href="#/completed">Completed</a> </li> </ul> <!-- Hidden if no completed items are left ↓ --> <button class="clear-completed" v-if="todos.some(item => item.completed)" @click="clearAllDoneClick" >Clear completed</button> </footer> </template> </section> <footer class="info"> <p>Double-click to edit a todo</p> <!-- Remove the below line ↓ --> <p>Template by <a href="http://sindresorhus.com">Sindre Sorhus</a></p> <!-- Change this out with your name and url ↓ --> <p>Created by <a href="http://todomvc.com">you</a></p> <p>Part of <a href="http://todomvc.com">TodoMVC</a></p> </footer> <!-- Scripts here. Don't remove ↓ --> <script src="node_modules/vue/dist/vue.js"></script> <script src="js/app.js"></script> </body> </html>
2、app.js
;(function () { Vue.directive('focus', { // 當被繫結的元素插入到 DOM 中時…… inserted: function (el) { // 聚焦元素 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改變事件 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、效果
