- 2018-05-08创建
v-for循环的是 对象object 时，
(value, key) in object
for example:
<div
class="main-section"
v-for="(menu, title) in menus"
:key="title">
<span class="main-title">{{ title }}</span>
<ul>
<li v-for="(item, index) in menu" :key="index">
<router-link exact :to="item.url">{{ item.name }}</router-link>
</li>
</ul>
</div>
