참고 페이지

https://www.w3schools.com/howto/howto_css_icon_bar.asp

https://bootstrap-vue.js.org/docs/components/alert

<template>
  <div class="icon-bar">
    <router-link to="/">Home</router-link>
    <router-link to="/"><v-icon name="home" scale="3"></v-icon></router-link>
    <router-link to="/about"><v-icon name="search" scale="3"></v-icon></router-link>
    <a href="#"><v-icon name="envelope" scale="3"></v-icon></a>
    <a href="#"><v-icon name="globe" scale="3"></v-icon></a>
    <a href="#"><v-icon name="trash" scale="3"></v-icon></a>
  </div>
</template>


<script>
export default {
    name: 'SideBar'
}
</script>

<style>

  .sidenav {
    height: 100%; /* Full-height: remove this if you want "auto" height */
    width: 160px; /* Set the width of the sidebar */
    position: fixed; /* Fixed Sidebar (stay in place on scroll) */
    z-index: 1; /* Stay on top */
    top: 0; /* Stay at the top */
    left: 0;
    background-color: #111; /* Black */
    overflow-x: hidden; /* Disable horizontal scroll */
    padding-top: 20px;
  }

  /* The navigation menu links */
  .sidenav a {
    padding: 6px 8px 6px 16px;
    text-decoration: none;
    font-size: 25px;
    color: #818181;
    display: block;
  }

  /* When you mouse over the navigation links, change their color */
  .sidenav a:hover {
    color: #f1f1f1;
  }

  @media screen and (max-height: 450px) {
    .sidenav {padding-top: 15px;}
    .sidenav a {font-size: 18px;}
  }

  .icon-bar {
    height: 100%;
    width: 90px;
    background-color: #555;
    position: fixed; /* Fixed Sidebar (stay in place on scroll) */
    /*z-index: 1;*/ /* Stay on top */
    /*top: 0;*/ /* Stay at the top */
    left: 0;
    overflow-x: hidden; /* Disable horizontal scroll */
    padding-top: 0;
  }

  .icon-bar a {
    display: block;
    text-align: center;
    padding: 16px;
    transition: all 0.3s ease;
    color: white;
    font-size: 36px;

  }

  .icon-bar a:hover {
    background-color: #858585;
  }

  .active {
    background-color: #5eaf13;
  }
</style>