Use CSS3 transitions with gradient backgrounds

Question

I\'m trying to transition on hover with css over a thumbnail so that on hover, the background gradient fades in. The transition isn\'t working, but if I simply change it to

Answer 1

I wanted to have a div appear like a 3D sphere and transition through colors. I discovered that gradient background colors don't transition (yet). I placed a radial gradient background in front of the element (using z-index) with a transitioning solid background.

/* overlay */
z-index : 1;
background : radial-gradient( ellipse at 25% 25%, rgba( 255, 255, 255, 0 ) 0%, rgba( 0, 0, 0, 1 ) 100% );

then the div.ball underneath:

transition : all 1s cubic-bezier(0.25, 0.46, 0.45, 0.94);

then changed the background color of the div.ball and voila!

https://codepen.io/keldon/pen/dzPxZP