Where can I find style guides for web apps online? [closed]

1. What is an online style guide?
2. What do you find in an Organisational style guide and why does it exist?

What is an online style guide?

A web design style guide — also known as digital style guide — is a resource where a brand collects and stores all design elements and rules for its website. It's comprised of graphic elements, typography, color scheme, and general formatting for developers to reference and follow for cohesive website composition.

What do you find in an Organisational style guide and why does it exist?

A style guide is a reference point that sets standards for writing documents within your organization. The focus of the style guide is not usually a matter of 'correct' or 'incorrect' grammar or style but, rather, it provides guidance for instances when many possibilities exist.