I created a video tutorial on how to make a responsive sidebar using CSS and vanilla Javascript

Part One: Building a Responsive Drawer

Part Two: Building a Vertical Navigation Menu

I coded a vertical, two-level, responsive navigation sidebar from scratch using vanilla JavaScript and CSS, without frameworks, preprocessors, or any build/compilation process, and described the process in detail in two YouTube tutorials.

This sidebar can be used as the foundation for a simple website or web application.