Vue.js实现按钮的动态绑定效果及实现代码

实现效果：

实现代码以及注释：

<!DOCTYPE html>
<html>
<head>
  <title>按钮绑定</title>
  <meta charset="utf-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <style type="text/css">
    *{
      margin: 0;
      padding: 0;
    }
    body{
      font: 15px/1.3 'Open Sans', sans-serif;
      color: #5e5b64;
      text-align: center;
    }
    a, a:visited{
      outline: none;
      color: #3b9dc1;
    }
    a:hover{
      text-decoration: none;
    }
    section, footer, header, aside, nav{
      display: block;
    }
    /* 菜单栏 */
    nav{
      display: inline-block;
      margin: 60px auto 45px;
      background-color: #5597b4;
      box-shadow: 0 1px 1px #ccc;
      border-radius: 2px;
    }
    nav a{
      display: inline-block;
      padding: 18px 30px;
      color: #fff !important;
      font-weight: bold;
      font-size: 16px;
      text-decoration: none !important;
      line-height: 1;
      text-transform: uppercase;
      background-color: transparent;
      -webkit-transition:background-color 0.25s;
      z-index: moz-transition:background-color 0.25s;
      transition:background-color 0.25s;
    }
    nav a:first-child{
      border-radius:2px 0 0 2px;
    }
    nav a:last-child{
      border-radius:0 2px 2px 0;
    }
    nav.home .home,
    nav.projects .projects,
    nav.services .services,
    nav.contact .contact{
      background-color:#e35885;
    }
    p{
      font-size:22px;
      font-weight:bold;
      color:#7d9098;
    }
    p b{
      color:#ffffff;
      display:inline-block;
      padding:5px 10px;
      background-color:#c4d7e0;
      border-radius:2px;
      text-transform:uppercase;
      font-size:18px;
    }
  </style>
</head>
<body>
<div id="main">
  <!--导航栏菜单会得到处于active的变量的值作为一个class -->
  <!-- 为了防止当我们点击链接时页面发生跳转，我们使用prevent优化 -->
  <nav v-bind:class="active" v-on:click.prevent>
    <!-- 当一个菜单中的链接被点击，我们调用定义在javaScript vue中的makeActive方法 -->
    <a href="#" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" class="home" v-on:click="makeActive('home')">Home</a>
    <a href="#" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" class="projects" v-on:click="makeActive('projects')">Projects</a>
    <a href="#" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" class="services" v-on:click="makeActive('services')">Services</a>
    <a href="#" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" class="contact" v-on:click="makeActive('contact')">Contact</a>
  </nav>
  <!-- mustache表达式将被active的值替换，它将发生任何变化它都将会自动更新-->
  <p>YOU SELECTED <b>{{active}}</b></p>
</div>
<script src="https://cdnjs.cloudflare.com/ajax/libs/vue/2.0.5/vue.min.js"></script>
<script type="text/javascript">
  // 创建一个Vue示例，并且传递一个可选对象
  var demo = new Vue({
    // 一个DOM元素表示我们的view模型
    el: '#main',
    // 定义属性值，给定初始化值
    data: {
      active: 'home'
    },
    // 我们需要使用到的函数
    methods: {
      makeActive: function(item){
        // 当一个model发生变化，view会自动更新
        this.active = item;
      }
    }
  });
</script>
</body>
</html>