w3schools locked sidebar code example
Example: how to fix the nav bar to the left of the page
.sidenav {
height: 100%;
width: 160px;
position: fixed;
z-index: 1;
top: 0;
left: 0;
overflow-x: hidden;
}
.sidenav {
height: 100%;
width: 160px;
position: fixed;
z-index: 1;
top: 0;
left: 0;
overflow-x: hidden;
}