ReactJS component names must begin with capital letters?

Question

I am playing around with the ReactJS framework on JSBin.

I have noticed that if my component name starts with a lowercase letter it does not work.

For instan

Answer 1

In JSX, React Classes are capitalized to make XML compatible, so that it is not mistaken for an HTML tag. If the react classes are not capitalized, it is an HTML tag as pre-defined JSX syntax.