Anne van Kesteren

opacity in Opera 9

Opera 9, also known as Merlin, will have support for opacity. Considering that most browsers already had this functionality we are bit late, but better late than never… opacity is drafted in the CSS3 Color Module. You have to wait a bit before you can play with it. Sorry about that. Dynamic testcases using opacity are accepted.

In related news, the new office of Q42 is really cool (and huge). Thanks to Mark for making sure I got there. Met Chris at the office, he is apparently a new colleague! Nice guy.


  1. One thing that's occurred to me now I've been playing with opacity for a bit is that fading in and out parts of the page sucks when the browser doesn't support opacity - it's just like rollovers, except delayed for a few seconds (when the fade is supposed to be happening).

    What's the best way of detecting whether a browser supports opacity or not? Right now, I'm using:

    function opacitySupported()
        if (!window.getComputedStyle) return false;
        var style = window.getComputedStyle(document.lastChild, document);
        if (typeof style.opacity != "undefined") return true;
        return false;

    It seems to me there should be an easier way.

    Posted by Jim at

  2. Does it support "rgba()" color notation?

    Posted by Jakub81 at

  3. It was nice to meet and IRL and see the faces behind the weblogs :D.

    Posted by Chris at

  4. Great! Now this cool image fader will work in Opera.

    Posted by Chris Hester at

  5. Which build supports it? Because the one I downloaded yesterday still didn't, and it's becoming a bit of a drag to keep telling people who contact me that it's Opera running behind on opacity, which is the cause of them not seeing the FACE example properly.

    Posted by Faruk Ateş at

  6. The build that is not yet released. You could just state that Opera is unsupported for now. I don’t really care about it. But I should note that this comment form is not for support questions regarding precious projects. It is more for cheering at cool new features.

    Posted by Anne at

  7. Finally! opacity it is a property that I use a lot. Probably it is work of the eventual purchase from part of Google.

    Posted by Fabio Polisini at