jQuery Animation

var $window = jQuery( window );

$window.scroll( function() {
    if( $window.scrollTop() > 110 ) {
        jQuery( '.header' ).addClass( 'fixed' );         
    }
    else if( $window.scrollTop() <= 560 ) {
        jQuery( '.header' ).removeClass( 'fixed' );
    }
});

How can i animate this add/remove class action? Thanks in advance!

You can try jQuery( ’.header’ ).addClass( ‘fixed’ ).fadeIn(); and .fadeOut()

You can do this with CSS3 Just add these properties below to your “fixed” class, then add the “fixed-visible” rule to the stylesheet, and last, change “fixed” to “fixed-visible” in your JS where to use addClass and removeClass.

.fixed {

    opacity: 0;
    visibility: hidden;

    -webkit-transition: all 0.6s cubic-bezier(0.230, 1.000, 0.320, 1.000);
    -moz-transition: all 0.6s cubic-bezier(0.230, 1.000, 0.320, 1.000);
    -o-transition: all 0.6s cubic-bezier(0.230, 1.000, 0.320, 1.000);
    -ms-transition: all 0.6s cubic-bezier(0.230, 1.000, 0.320, 1.000);
    transition: all 0.6s cubic-bezier(0.230, 1.000, 0.320, 1.000);

}

.fixed-visible {

    opacity: 1;
    visibility: visible;

}

It’s fallback-proof for browsers that don’t support CSS3 transitions. And in those cases, the menu just won’t animate. But my philosophy on this is: Use an old browser? No Candy for You!

Also, here are some more transitions you can use:

CodingJack said
Use an old browser? No Candy for You!

+1 for css3