System of Multi-Level off-canvas menu with jQuery and CSS3 is developed by designcounch that also supports 3-tier sub-menus based on nested html lists. When you click the menu button, a vertical sidebar menu slides out from the left side of browser window with an overlay which cover the main content.

Multi-Level Off-Canvas Menu

[button type=”link” link=”http://codepen.io/designcouch/full/cxhgB/” variation=”btn-primary” target=”blank”]Live Demo[/button]        [button type=”link” link=”http://codepen.io/designcouch/pen/cxhgB” variation=”btn-info” target=”blank”]View source code[/button]