How to have a button vertical like on mdbootstrap site

Dear @Cedric RADO ARY

you can create a similar sidenav using css, like below:

<div class="sidenav-container d-none d-md-block">
  <div class="sidenav-child vertical-center">
    <a class="d-block "><mdb-icon fab icon="angular" size="lg"></mdb-icon></a>
  </div>
  <div class="sidenav-child vertical-center">
    <a class="d-block "><mdb-icon fab icon="angular" size="lg"></mdb-icon></a>
  </div>
  <div class="sidenav-child vertical-center ">
    <a class="d-block "><mdb-icon fab icon="angular" size="lg"></mdb-icon></a>
  </div>
  <div class="sidenav-child vertical-center ">
    <a class="d-block "><mdb-icon fab icon="angular" size="lg"></mdb-icon></a>
  </div>
</div>

styles.scss

.sidenav-container {
  position: fixed;
  top: 300px;
  right: 0;
  width: 40px;
  background: #fff;
  border-radius: 4px 0 0 4px;
  -webkit-box-shadow: 0 2px 5px 0 rgba(0, 0, 0, 0.16), 0 2px 10px 0 rgba(0, 0, 0, 0.12);
  box-shadow: 0 2px 5px 0 rgba(0, 0, 0, 0.16), 0 2px 10px 0 rgba(0, 0, 0, 0.12);
}

.sidenav-child {
  height: 3rem;
  border-top: 1px solid #33b5e5;
  border-left: 1px solid #33b5e5;
  color: #6b6e72;
  border-top-left-radius: 4px;
  transition: background-color 0.3s;
}
.vertical-center {
  min-height: 100%;

  display: flex;
  align-items: center;
  justify-content: center;
}

Hope it helps!

Best Regards, Bartosz.