What is LESS and how do I use it?
LESS is a CSS Pre-Processor. In simple terms, LESS allows you to write CSS in a smarter way by combining functions, mixins, operations and more. This means you write more concise style information and can reuse things like colors and styles more easily.
Bootstrap was built using LESS, which is why we also use LESS to build Jarvis. While a full tutorial is out of the scope of the documentation, there are many tutorials of LESS available on the internet.