App.vue

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

<script>
  export default {
    name: "App",
    methods: {},
    data() {
      return {};
    }
  };
</script>
  .el-container{

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