vue实现过度切换

使用 <transition> 组件实现基础过渡

Vue 提供了内置的 <transition> 组件，用于在元素或组件插入、更新或移除时应用过渡效果。以下是一个简单的淡入淡出效果示例：

<template>
  <button @click="show = !show">Toggle</button>
  <transition name="fade">
    <p v-if="show">Hello Vue!</p>
  </transition>
</template>

<script>
export default {
  data() {
    return {
      show: true
    }
  }
}
</script>

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

自定义过渡类名

可以通过指定 enter-class、enter-active-class 等属性来使用第三方 CSS 动画库（如 Animate.css）：

<transition
  enter-active-class="animate__animated animate__bounceIn"
  leave-active-class="animate__animated animate__bounceOut"
>
  <p v-if="show">Animated text</p>
</transition>

JavaScript 钩子实现复杂过渡

通过 JavaScript 钩子可以在过渡的不同阶段执行自定义逻辑：

<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">Content</div>
</transition>

<script>
export default {
  methods: {
    beforeEnter(el) {
      el.style.opacity = 0
      el.style.transform = 'translateY(50px)'
    },
    enter(el, done) {
      anime({
        targets: el,
        opacity: 1,
        translateY: 0,
        duration: 500,
        complete: done
      })
    },
    leave(el, done) {
      anime({
        targets: el,
        opacity: 0,
        translateY: 50,
        duration: 500,
        complete: done
      })
    }
  }
}
</script>

列表过渡使用 <transition-group>

对于多个元素的过渡效果，可以使用 <transition-group> 组件：

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

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

路由过渡效果

在 Vue Router 中实现页面切换过渡：

<router-view v-slot="{ Component }">
  <transition name="route" mode="out-in">
    <component :is="Component" />
  </transition>
</router-view>

<style>
.route-enter-active, .route-leave-active {
  transition: opacity 0.3s, transform 0.3s;
}
.route-enter {
  opacity: 0;
  transform: translateX(30px);
}
.route-leave-to {
  opacity: 0;
  transform: translateX(-30px);
}
</style>

动态过渡效果

根据状态动态改变过渡效果：

<transition :name="transitionName">
  <div v-if="show">Content</div>
</transition>

<script>
export default {
  data() {
    return {
      show: false,
      isMobile: false
    }
  },
  computed: {
    transitionName() {
      return this.isMobile ? 'slide' : 'fade'
    }
  }
}
</script>