vuequanxain/src/App.vue

<template>
  <div id="app">
    <router-view></router-view>
  </div>
</template>

<script>
export default {
  name: "app",
  components: {},
};
</script>

<style lang="scss">
html,
body,
#app {
  height: 100%;
}
</style>