本章节为大家介绍几个 Vue.js 实例，通过实例练习来巩固学到的知识点。

一、导航菜单实例

创建一个简单的导航菜单：


<div id="main">        激活的菜单样式为  active 类       为了阻止链接在点击时跳转，我们使用了 "prevent" 修饰符 (preventDefault 的简称)。        <nav v-bind:class="active" v-on:click.prevent>            当菜单上的链接被点击时，我们调用了 makeActive 方法, 该方法在 Vue 实例中创建。            <a href="#" class="home" v-on:click="makeActive('home')">Home</a>         <a href="#" class="projects" v-on:click="makeActive('projects')">Projects</a>         <a href="#" class="services" v-on:click="makeActive('services')">Services</a>         <a href="#" class="contact" v-on:click="makeActive('contact')">Contact</a>     </nav>         以下 "active" 变量会根据当前选中的值来自动变换        <p>您选择了 <b>{{active}} 菜单</b></p> </div>   <script> // 创建一个新的 Vue 实例 var demo = new Vue({     // DOM 元素，挂载视图模型     el: '#main',       // 定义属性，并设置初始值     data: {         active: 'home'     },       // 点击菜单使用的函数     methods: {         makeActive: function(item){             // 模型改变，视图会自动更新             this.active = item;         }     } });  v-cloak 隐藏未编译的变量，直到 Vue 实例准备就绪。   元素点击后 hideTooltp() 方法被调用    <div id="main" v-cloak v-on:click="hideTooltip">
<div class="tooltip" v-on:click.stop v-if="show_tooltip">          <input type="text" v-model="text_content" />     </div>        点击后调用 "toggleTooltip" 方法并阻止事件传递        "text_content" 变量根据文本域内容的变化而变化      <p v-on:click.stop="toggleTooltip">{{text_content}}</p>   </div>   <script> var demo = new Vue({     el: '#main',     data: {         show_tooltip: false,         text_content: '点我，并编辑内容。'     },     methods: {         hideTooltip: function(){             // 在模型改变时，视图也会自动更新             this.show_tooltip = false;         },         toggleTooltip: function(){             this.show_tooltip = !this.show_tooltip;         }     } }) </script>



三、订单列表实例

创建一个订单列表，并计算总价：


<form id="main" v-cloak>     <h1>Services</h1>      <ul>           循环输出 services 数组, 设置选项点击后的样式           <li v-for="service in services" v-on:click="toggleActive(service)" v-bind:class="{ 'active': service.active}">             {{service.name}} <span>{{service.price | currency}}</span>          </li>     </ul>       <div class="total">           计算所有服务的价格，并格式化货币           Total: <span>{{total() | currency}}</span>     </div>   </form> <script>   // 自定义过滤器 "currency".  Vue.filter('currency', function (value) {     return '$' + value.toFixed(2); });   var demo = new Vue({     el: '#main',     data: {         // 定义模型属性 the model properties. The view will loop         // 视图将循环输出数组的数据         services: [             {                 name: 'Web Development',                 price: 300,                 active:true             },{                 name: 'Design',                 price: 400,                 active:false             },{                 name: 'Integration',                 price: 250,                 active:false             },{                 name: 'Training',                 price: 220,                 active:false             }         ]     },     methods: {         toggleActive: function(s){             s.active = !s.active;         },         total: function(){               var total = 0;               this.services.forEach(function(s){                 if (s.active){                     total+= s.price;                 }             });              return total;         }     } });      </script>


四、搜索页面实例

在输入框输入搜索内容，列表显示配置的列表：


<form id="main" v-cloak>      <div class="bar">          searchString 模型与文本域创建绑定           <input type="text" v-model="searchString" placeholder="输入搜索内容" />     </div>       <ul>          循环输出数据                       <li v-for="article in filteredArticles">             <a v-bind:href="article.url"><img v-bind:src="article.image" />a>             <p>{{article.title}}</p>         </li>     </ul>   </form> <script>   var demo = new Vue({     el: '#main',     data: {         searchString: "",           // 数据模型，实际环境你可以根据 Ajax 来获取           articles: [             {                 "title": "What You Need To Know About CSS Variables",                 "url": "https://www.runoob.com/css/css-tutorial.html",                 "image": "https://static.runoob.com/images/icon/css.png"             },             {                 "title": "Freebie: 4 Great Looking Pricing Tables",                 "url": "https://www.runoob.com/html/html-tutorial.html",                 "image": "https://static.runoob.com/images/icon/html.png"             },             {                 "title": "20 Interesting JavaScript and CSS Libraries for February 2016",                 "url": "https://www.runoob.com/css3/css3-tutorial.html",                 "image": "https://static.runoob.com/images/icon/css3.png"             },             {                 "title": "Quick Tip: The Easiest Way To Make Responsive Headers",                 "url": "https://www.runoob.com/css3/css3-tutorial.html",                 "image": "https://static.runoob.com/images/icon/css3.png"             },             {                 "title": "Learn SQL In 20 Minutes",                 "url": "https://www.runoob.com/sql/sql-tutorial.html",                 "image": "https://static.runoob.com/images/icon/sql.png"             },             {                 "title": "Creating Your First Desktop App With HTML, JS and Electron",                 "url": "https://www.runoob.com/js/js-tutorial.html",                 "image": "https://static.runoob.com/images/icon/html.png"             }         ]     },     computed: {         // 计算数学，匹配搜索         filteredArticles: function () {             var articles_array = this.articles,                 searchString = this.searchString;               if(!searchString){                 return articles_array;             }               searchString = searchString.trim().toLowerCase();               articles_array = articles_array.filter(function(item){                 if(item.title.toLowerCase().indexOf(searchString) !== -1){                     return item;                 }             })               // 返回过滤后的数据             return articles_array;;         }     } }); </script>



五、切换不同布局实例

点击右上角的按钮来切换不同页面布局：


<form id="main" v-cloak>      <div class="bar">           两个按钮用于切换不同的列表布局           <a class="list-icon" v-bind:class="{ 'active': layout == 'list'}" v-on:click="layout = 'list'"></a>         <a class="grid-icon" v-bind:class="{ 'active': layout == 'grid'}" v-on:click="layout = 'grid'"></a>     </div>         我们设置了两套布局页面。使用哪套依赖于 "layout" 绑定       <ul v-if="layout == 'grid'" class="grid">          使用大图，没有文本          <li v-for="a in articles">             <a v-bind:href="a.url" target="_blank" rel="noopener noreferrer"><img v-bind:src="a.image.large" />a>         </li>     </ul>       <ul v-if="layout == 'list'" class="list">          使用小图及标题          <li v-for="a in articles">             <a v-bind:href="a.url" target="_blank" rel="noopener noreferrer"><img v-bind:src="a.image.small" />a>             <p>{{a.title}}</p>         </li>     </ul>   </form> <script>       var demo = new Vue({         el: '#main',         data: {             // 视图模型，可能的值是 "grid" 或 "list"。             layout: 'grid',               articles: [{                 "title": "HTML 教程",                 "url": "https://www.runoob.com/html/html-tutorial.html",                 "image": {                     "large": "https://static.runoob.com/images/mix/htmlbig.png",                     "small": "https://static.runoob.com/images/icon/html.png"                 }             },             {                 "title": "CSS 教程",                 "url": "https://www.runoob.com/css/css-tutorial.html",                 "image": {                     "large": "https://static.runoob.com/images/mix/cssbig.png",                     "small": "https://static.runoob.com/images/icon/css.png"                 }             },             {                 "title": "JS 教程",                 "url": "https://www.runoob.com/js/js-tutorial.html",                 "image": {                     "large": "https://static.runoob.com/images/mix/jsbig.jpeg",                     "small": "https://static.runoob.com/images/icon/js.png"                 }             },             {                 "title": "SQL  教程",                 "url": "https://www.runoob.com/sql/sql-tutorial.html",                 "image": {                     "large": "https://static.runoob.com/images/mix/sqlbig.png",                     "small": "https://static.runoob.com/images/icon/sql.png"                 }             },             {                 "title": "Ajax 教程",                 "url": "https://www.runoob.com/ajax/ajax-tutorial.html",                 "image": {                     "large": "https://static.runoob.com/images/mix/ajaxbig.png",                     "small": "https://static.runoob.com/images/icon/ajax.png"                 }             },             {                 "title": "Python 教程",                 "url": "https://www.runoob.com/pyhton/pyhton-tutorial.html",                 "image": {                     "large": "https://static.runoob.com/images/mix/pythonbig.png",                     "small": "https://static.runoob.com/images/icon/python.png"                 }             }]           }     });      </script>