jQuery - If element has class do this
Solution 1:
First, you're missing some parentheses in your conditional:
if ($("#about").hasClass("opened")) {
$("#about").animate({right: "-700px"}, 2000);
}
But you can also simplify this to:
$('#about.opened').animate(...);
If #about doesn't have the opened class, it won't animate.
If the problem is with the animation itself, we'd need to know more about your element positioning (absolute? absolute inside relative parent? does the parent have layout?)