The Different Types of Fundamentals of React

There are different types of fundamentals is what I'm trying to say. So there's the browser itself as it works underneath React, but you know, technologies that are not specifically tied to react. And then there are the fundamentals of React. If I'm using some other framework, which is not React, then I don't really need to know about the virtual DOM because there is no virtual DOM when I'm using Svelte.