<template>
  <div id="app">
    <transition :enter-active-class="enterTransition" :leave-active-class="leaveTransition">
      <keep-alive>
        <router-view class="routeView" />
      </keep-alive>
    </transition>
  </div>
</template>

<script
 
>
import myhea from "@/components/hea.vue";
import myfooter from "@/components/footer.vue";
export default {
  name: "App",
  components: {
    myhea,
    myfooter,
  },
  data() {
    return {
      enterTransition: "animate__animated animate__fadeIn",
      leaveTransition: "animate__animated animate__fadeOut",
    };
  },
  watch: {
    $route(to, from) {
      let toDepth = to.meta.depth;
      let fromDepth = from.meta.depth;
      if (fromDepth > toDepth) {
        this.enterTransition = "animate__animated animate__fadeInLeft";
        this.leaveTransition = "animate__animated animate__fadeOutRight";
      } else if (fromDepth 
 
< toDepth) {
        this.enterTransition = "animate__animated animate__fadeInRight";
        this.leaveTransition = "animate__animated animate__fadeOutLeft";
      } else {
        this.enterTransition = "animate__animated animate__fadeIn";
        this.leaveTransition = "animate__animated animate__fadeOut"
 
;
      }
    },
  },
};
</script>

<style>
.routeView {
  position: absolute;
  left: 0;
  right: 0;
  top: 0;
  bottom: 0;
}
* {
  margin: 0px;
  padding: 0px;
}
#app {
  min-width: 20rem;
  font-family: Avenir, Helvetica, Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-align: center;
  color: #2c3e50;
}
</style>

$ npm install animate.css --save