Why do we capitalize components?
Because they're a constructor. It is not a rendered DOM element YET, it just has the capacity to render out a DOM element whenever we p...

http://www.interviewquestionspdf.com/2017/01/why-do-we-capitalize-components.html
Because they're a constructor. It is not a rendered DOM element YET, it just has the capacity to render out a DOM element whenever we print it (with something like <Header />).