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Vue.js 导航菜单</title>
    <script src="https://cdn.staticfile.net/vue/2.4.2/vue.min.js"></script>
    <style>

*{
		margin:0;
		padding:0;
	}

body{
		font:15px/1.3 'Open Sans', sans-serif;
		color: #5e5b64;
		text-align:center;
	}

a, a:visited {
		outline:none;
		color:#389dc1;
	}

a:hover{
		text-decoration:none;
	}

section, footer, header, aside, nav{
		display: block;
	}

/*-------------------------
		菜鸟
	--------------------------*/

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;
		-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>

<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>

<p>您选择了 <b>{{active}} 菜单</b></p>
</div>

// 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;
		}
	}
});
</script>