Eliminate flash of unstyled content

Question

How do I stop the flash of unstyled content (FOUC) on a web page?

Answer 1

A solution which doesn't depend on jQuery, which will work on all current browsers and do nothing on old browsers, include the following in your head tag:

    ...

    
    

Thanks to @justastudent, I tried just setting elm.style.display="none"; and it appears to work as desired, at least in current Firefox Quantum. So here is a more compact solution, being, so far, the simplest thing I've found that works.