不是很清楚两个transition嵌套的原理
<transition name="fade">
<div class="slide-content-wrapper" v-show="menuvisible && setvisible === 3">
<transition name="slide-right">
<div class='content' v-if="setvisible === 3"></div>
</transition>
<div class="content-bg" @click="hideMenuTitle()"></div>
</div>
</transition>