CodePen

CodePen -- CodePen is a pretty neat site. I've stumbled across it before this assignment. You can easily put in whatever you're searching for and find some relevant code. The neat thing about it though is that it has a real time output area. You can even edit the shown code and see how it changes the element.

CSS-Tricks

CSS-Tricks -- CSS Tricks is another one of those sites I've ran across doing projects. All sorts of information. Looking up Hamburger Menu gave me 33 results. Different styles and methods.Animate SVG PathsThis article is pretty interesting. Shows some neat ways to animate SVGs.

FreeFrontend

FreeFrontend -- Found this collection of 50 some Hamburger menu examples. They range from just HTML and CSS to using Javascript and a few other programming languages. Plenty of inspiration for coming up with animation styles.

Summary

There are tons of sites out there with information on Hamburger Menu's, these three gave me a good start. I really like CodePen and it's ability to show real time changes without having to put it in your VScode.