请教一个vue transition 动画的问题，我给页面一个元素加了transition过渡效果，进入当前页面能触发效果，离开就不行，想问一下这是为什么，还是我哪里写的不对 <transition name="fade" :appear="true" > <div class="e letter cursor-pointer" @click="toExplore">E</div></transition>// animation.fade-enter,.fade-leave-to { opacity: 0;}.fade-leave,.fade-enter-to { opacity: 1;}.fade-enter-active { transition: all 1.2s ease-out;}.fade-leave-active{ transition: all 1.2s ease-in;}