• 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>