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问题是在元素消失时过渡可以正常工作,但在出现时根本不工作。我正在使用 Vue3

<transition name='accepted'>
      <span v-if='agreement.accepted'>
          accepted at {{ agreement.acceptedAt.toLocaleDateString() }}
      </span>
    </transition>

cssy

.accepted-enter-from, .accepted-leave-to {
  opacity: 0;
}

.accepted-enter-active, .accepted-leave-active {
  transition: opacity 5s ease;
}
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