index.vue

<template>
  <div class="app-wrapper">
    <HeaderNav />
    <div class="app-content">
      <SideBar />
      <AppMain />
    </div>
  </div>
</template>
<script>
import HeaderNav from './components/HeaderNav'
import SideBar from './components/Sidebar'
import AppMain from './components/AppMain'
export default {
  name: 'Layout',
  components: {
    HeaderNav,
    SideBar,
    AppMain
  }
}
</script>
<style lang="scss" scoped>
.app-wrapper {
  position: relative;
  width: 100%;
  height: 100%;
  display: flex;
  flex-direction: column;
}
.app-content {
  display: flex;
  flex-direction: row;
  justify-content: space-between;
}
</style>