/* 可以设置不同的进入和离开动画 */
/* 设置持续时间和动画函数 */
.fade-enter-active, .fade-leave-active {
	transition: opacity 2s
}
.fade-enter, .fade-leave-to /* .fade-leave-active, 2.1.8 版本以下 */ {
	opacity: 0
}
/* 方式一 */
.p1-enter-active{
  animation: show 0.5s linear;
}
.p1-leave-active{
  animation: show 0.5s linear reverse;
}

@keyframes show {
  from{
	transform: translateX(-100%);
  }
  to{
	transform: translateX(0px);
  }
}

/* 方式二 */
/* 进入的起点、离开的终点 */
.p2-enter,.p2-leave-to{
  transform: translateX(-100%);
}
.p2-enter-active,.p2-leave-active{
  transition: 1s linear;
}
/* 进入的终点、离开的起点 */
.p2-enter-to,.p2-leave{
  transform: translateX(0px);
}

<div id = "app">
<button v-on:click = "show = !show">点我</button>
	<!-- 动画库使用 -->
    <transition-group 
      appear
      name="animate__animated animate__bounce"
      enter-active-class="animate__bounce"
      leave-active-class="animate__backOutDown"
    >
      <p v-show="!show" key="1">animate1</p>
      <p v-show="show" key="2">animate2</p>
    </transition-group>
	<transition name = "fade">
		<p v-show = "show" v-bind:style = "styleobj">动画实例</p>
	</transition>
		<transition name = "p1">
		<p v-show = "show" v-bind:style = "styleobj">动画实例</p>
	</transition>
		<transition name = "p2">
		<p v-show = "show" v-bind:style = "styleobj">动画实例</p>
	</transition>
	
</div>

// -------------------
new Vue({
el: '#app',
    data: {
        show:true,
        styleobj :{
            fontSize:'30px',
            color:'red'
        }
    },
    methods : {
    }
});