Uncaught TypeError with fadeIn in jQuery 1.9

Question

Here is the problem, unfortunately we have to support IE8.
So I had to change from using the latest jQuery 2.0+ back to jQuery 1.9.

Now we use a lot of jQuery t

Answer 1

$content.fadeIn('fast'); typically removes the object after it fades out while $content.show(); does not.

I would recommend you use $content.animate({opacity: 1});

Explore animate() for more options.

EDIT: sorry opacity was set to 0 (fadeOut();), it's correct now: 1 (fadeIn();)

EDIT2:

It might be that the opposite is happening you are trying to use an object that hasn't been loaded yet.

try this:
$content.css({opacity: 0.1, display: block}).animate({opacity: 1});
or
$content.css({opacity: 0.1}).show().animate({opacity: 1});

it loads the object with little opacity and then makes it to full opacity