A front-end guide is a tool developed by De Voorhoede, which let you preview views and components of a website. A front-end guide, or style guide, can be compared to a pattern library, although a pattern library is more design-oriented.
A front-end guide is a tool which renders a living set of views and components in the browser. A view is a page consisting of multiple components. A component is a part of a website that can work in isolation, without dependencies on other components. Examples of components are the header of a page, a newsletter form and a video player.
Components contain documentation and source code. Front-end developers can pick a component from the front-end guide and used it in their project.