html：
<div id="app">
<div class="collection">
<a href="#!" v-for="gameName in gameNames"
@click="selected(gameName)"
:class="{active: activeName == gameName}">{{gameName}}</a>
</div>
</div>
javascript：
new Vue({
el: "#app",
data: {
gameNames: [‘魔兽世界‘, ‘暗黑破坏神Ⅲ‘, ‘星际争霸Ⅱ‘, ‘炉石传说‘, ‘风暴英雄‘,
‘守望先锋‘
],
activeName: ‘‘
},
methods: {
selected: function(gameName) {
this.activeName = gameName
}
}
})
