The difference between Vue3 and Vue2: more powerful animation effect support

The difference between Vue3 and Vue2: More powerful animation effect support

Vue is a popular JavaScript framework for building user interfaces. The latest Vue version is Vue3, which brings many new features and enhancements, one of which is more powerful animation effect support. This article will introduce the improvements in animation effects of Vue3 compared to Vue2, and demonstrate them through code examples.

1. Programmatic animation
   In Vue2, we can use Vue’s built-in instructions (such as v-if and v-show) to achieve some simple animation effects, but for more complex ones For animation, we usually need to use a third-party library (such as Animate.css) or manually manipulate the DOM to achieve it. In Vue3, we can use the new Composition API to write animation logic, making the implementation of animation effects simpler and more flexible.

The following is an example of a simple animation effect implemented using Vue3's Composition API:

import { ref, onMounted } from 'vue';

export default {
  setup() {
    const isVisible = ref(false);

    onMounted(() => {
      isVisible.value = true;
    });

    return {
      isVisible
    }
  }
}

In the above code, we create a response using ref Formula isVisible variable and set it to true in the component's onMounted life cycle function. By modifying the value of isVisible, we can dynamically control the display and hiding of elements.

2. Transition component
   In Vue2, we can use the <transition></transition> component to wrap the elements that need to be animated and specify different stages by adding class names. animation effects. In Vue3, in addition to continuing to use the <transition></transition> component, the <transition-group></transition-group> and <teleport></teleport> components are also introduced, so that The implementation of animation effects is more flexible and efficient.

The following is an example of a simple fade effect implemented using Vue3's <transition></transition> component:

<template>
  <transition name="fade">
    <p v-if="isVisible">Hello, Vue3!</p>
  </transition>
</template>

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

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

In the above code, we use <transition></transition>The component wraps a <p></p> element and specifies the name of the animation effect as "fade". In the CSS style, we define the style of the entry and exit stages of the animation, and trigger the animation effect by adding the class name.

3. GSAP integration
   Vue3 also has built-in support for GSAP (GreenSock Animation Platform). GSAP is a powerful JavaScript animation library that can achieve complex animation effects. Through Vue3's <transition></transition> component, we can easily integrate GSAP and use its animation effect function.

The following is an example of a dynamic rotation effect achieved using Vue3 integrated with GSAP:

<template>
  <transition
    name="rotate"
    enter-active-class="rotate-enter-active"
    enter-from-class="rotate-enter-from"
  >
    <div v-if="isVisible" class="box"></div>
  </transition>
</template>

<style>
.box {
  width: 100px;
  height: 100px;
  background-color: red;
}

.rotate-enter-active {
  animation: rotateEnter 1s;
}

@keyframes rotateEnter {
  from {
    transform: rotate(0deg);
  }
  to {
    transform: rotate(360deg);
  }
}
</style>

In the above code, we define an animation effect named "rotate", And use CSS @keyframes to achieve the rotation effect. Apply CSS animation to the animation effect by adding the enter-active-class and enter-from-class attributes to the <transition></transition> component.

Summary:
Compared with Vue2, the improvements in animation effects of Vue3 are mainly reflected in the following aspects: providing a more flexible programming method to implement animation; introducing and <teleport></teleport> components expand the application scenarios of animation effects; built-in support for GSAP provides more powerful animation library integration.

The above is an introduction and code example of Vue3’s more powerful animation effect support than Vue2. The new animation function makes us more convenient and flexible when building beautiful user interfaces. Together with other enhancements brought by Vue3, we can develop excellent Vue applications more efficiently.

The above is the detailed content of The difference between Vue3 and Vue2: more powerful animation effect support. For more information, please follow other related articles on the PHP Chinese website!