Webprogramming: Modular-based or component-based?

I am writing a thesis for university about my angular webproject and read that it could be a modular-based and / or component-based structure. Since I am relatively new to software patterns, etc, I wonder what the key differences are.

I think of something like: A module is a reusable code parts, a "closed" entity that could also be runned, a component should ensure reuseability of a common code snippet (doesn't have to be runnable) .

Am I right in this approach?