What does Webflow.css & Webflow.js do?

Webflow.css contains common base styles for the Webflow grid/layout system, as well as all the components like navbars, sliders, and tabs.

Webflow.js contains all the JavaScript necessary to make the interactive elements of your pages work properly. Things like forms, navbars, sliders, tabs, and interactions rely on webflow.js – If this file is removed, your page design might look correct, but a lot of functionality will not work as expected.