Question

I have a navigation and one of the buttons needs to be highlighted!

It needs to have font-weight: 600; and after 2 seconds it goes back to font-weight: 0; and it repeats all the time – time between “font-weight” changes is 2 seconds. How to make a loop?

Answer 1

Just toggleClass() inside an interval:

jsBin demo

CSS:

.bolded{
  font-weight:600;
}

jQuery:

function toggleBold(){
  $('a.active').toggleClass('bolded');
}

setInterval(toggleBold, 2000);