I know of this method from the good old Internet Explorer 6 days. In order to force the browser to redraw an element, solving weird browser refresh issues, change it's css class. I usually go for element.className+='';. So you see, you don't have to actually change it. Sometimes you need to do this after a bit of code has been executed, so put it all in a setTimeout.

More explicitly, I was trying to solve this weird bug where using jQuery slideUp/slideDown I would get some elements in Internet Explorer 8 to disregard some CSS rules. Mainly the header of a collapsible panel would suddenly and intermittently seem to lose a margin-bottom: 18px !important; rule. In order to fix this instead of panel.slideUp(); I used
panel.slideUp(400/*the default value*/,function() { 
setTimeout(function() {
where panel is the collapsible part and header is the clickable part. Same for slideDown.


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