This hamburger menu design CSS lets you expand the menu by clicking on the sidebar navigation menu at the top left corner. Mobile app developers and users are not left out on this. Morphing Hamburger Menu. ... CSS only mobile nav trigger and menus. It should be planned from the beginning. Let’s add some media queries for tablet size and above, to display the links directly, in place of the menu icon. The Hamburger Menu icon. Hamburger Menu with CSS only. First, we need to create the wrapper for the entire navigation menu