vue实现过渡效果

Vue 过渡效果实现方法

Vue 提供了内置的 <transition> 和 <transition-group> 组件，用于在元素或组件进入/离开 DOM 时应用过渡效果。以下是具体实现方式：

使用 <transition> 组件

<transition name="fade">
  <div v-if="show">过渡内容</div>
</transition>

.fade-enter-active, .fade-leave-active {
  transition: opacity 0.5s;
}
.fade-enter, .fade-leave-to {
  opacity: 0;
}

使用 JavaScript 钩子

<transition
  @before-enter="beforeEnter"
  @enter="enter"
  @after-enter="afterEnter"
  @enter-cancelled="enterCancelled"
  @before-leave="beforeLeave"
  @leave="leave"
  @after-leave="afterLeave"
  @leave-cancelled="leaveCancelled"
>
  <div v-if="show">过渡内容</div>
</transition>

methods: {
  beforeEnter(el) {
    el.style.opacity = 0
  },
  enter(el, done) {
    anime({
      targets: el,
      opacity: 1,
      duration: 500,
      complete: done
    })
  },
  leave(el, done) {
    anime({
      targets: el,
      opacity: 0,
      duration: 500,
      complete: done
    })
  }
}

列表过渡使用 <transition-group>

<transition-group name="list" tag="ul">
  <li v-for="item in items" :key="item.id">
    {{ item.text }}
  </li>
</transition-group>

.list-enter-active, .list-leave-active {
  transition: all 1s;
}
.list-enter, .list-leave-to {
  opacity: 0;
  transform: translateY(30px);
}

自定义过渡类名

<transition
  enter-active-class="animate__animated animate__bounceIn"
  leave-active-class="animate__animated animate__bounceOut"
>
  <div v-if="show">使用 Animate.css</div>
</transition>

初始渲染过渡

<transition
  appear
  appear-class="custom-appear-class"
  appear-to-class="custom-appear-to-class"
  appear-active-class="custom-appear-active-class"
>
  <div>初始渲染过渡</div>
</transition>

过渡模式

<transition mode="out-in">
  <button :key="isEditing" @click="isEditing = !isEditing">
    {{ isEditing ? '保存' : '编辑' }}
  </button>
</transition>

以上方法可以组合使用，根据具体需求选择最合适的实现方式。Vue 的过渡系统非常灵活，可以结合 CSS 动画库如 Animate.css 或 JavaScript 动画库如 GSAP 实现更复杂的效果。