动画

<template>
	<div>
		<button @click="isShow = !isShow">显示/隐藏</button>
		<transition name="hello" appear>
			<h1 v-show="isShow">你好啊！</h1>
		</transition>
	</div>
</template>

<script>
	export default {
		name:'Test',
		data() {
			return {
				isShow:true
			}
		},
	}
</script>

<style scoped>
	h1{
		background-color: orange;
	}
	/*tansition的name属性与样式的前缀需要对应，此处是hello*/
	.hello-enter-active{
		animation: slide 0.5s linear;
	}

	.hello-leave-active{
		animation: slide 0.5s linear reverse;
	}

	@keyframes slide {
		from{
			transform: translateX(-100%);
		}
		to{
			transform: translateX(0px);
		}
	}
</style>

过渡

<template>
	<div>
		<button @click="isShow = !isShow">显示/隐藏</button>
		<transition-group name="hello" appear>
			<h1 v-show="!isShow" key="1">成员1</h1>
			<h1 v-show="isShow" key="2">成员2</h1>
		</transition-group>
	</div>
</template>

<script>
	export default {
		name:'Test',
		data() {
			return {
				isShow:true
			}
		},
	}
</script>

<style scoped>
	h1{
		background-color: orange;
	}
	/* 进入的起点、离开的终点 */
	.hello-enter,.hello-leave-to{
		transform: translateX(-100%);
	}
	.hello-enter-active,.hello-leave-active{
		transition: 0.5s linear;
	}
	/* 进入的终点、离开的起点 */
	.hello-enter-to,.hello-leave{
		transform: translateX(0);
	}

</style>

多个元素需要过渡动画则要使用<transition-group>，且每个元素都要指定key值。

第三方库

安装：https://www.npmjs.com/package/animate.css

使用：https://animate.style/

引入：import 'animate.css'

<template>
	<div>
		<button @click="isShow = !isShow">显示/隐藏</button>
		<transition-group 
			appear
			name="animate__animated animate__bounce" 
			enter-active-class="animate__swing"
			leave-active-class="animate__backOutUp"
		>
			<h1 v-show="!isShow" key="1">成员1</h1>
			<h1 v-show="isShow" key="2">成员2</h1>
		</transition-group>
	</div>
</template>

<script>
	import 'animate.css'
	export default {
		name:'Test',
		data() {
			return {
				isShow:true
			}
		},
	}
</script>

<style scoped>
	h1{
		background-color: orange;
	}