When a spoiler blockquote contains text, the text transitions in smoothly using a CSS transition. If it contains an image, the transition is abrupt.

I've shared a brief animated gif of the transition as-is

If the CSS were changed from:

.spoiler:hover img {
    visibility: visible;
.spoiler img {
    visibility: hidden;


.spoiler:hover img {
    opacity: 1;
.spoiler img {
    opacity: 0;
    transition: opacity 0.5s ease-in;

The image transition would be much smoother.

Live example:

this is a test this is only a test
placeholder image

  • 5
    Took the liberty to add the live example here, so that we can see it happening. Nov 19, 2014 at 19:47
  • Inline code too.
    – bjb568
    Nov 20, 2014 at 0:14
  • "Viewing this content requires Adobe Flash Player. You can download Adobe Flash Player from get.adobe.com/flashplayer." Grr, why can't you just add a GIF? :P
    – Doorknob
    Jan 19, 2015 at 3:20
  • @Doorknob, ...because I already had Jing, and I didn't have a tool for recording to GIF. I've updated the video links to GIFs.
    – zzzzBov
    Jan 19, 2015 at 14:49
  • @zzzzBov My comment was more tongue-in-cheek than anything, but thanks anyway.
    – Doorknob
    Jan 19, 2015 at 15:40
  • @Doorknob, I thought you were the one who downvoted me on this one, figured I'd take the opportunity to improve it.
    – zzzzBov
    Jan 19, 2015 at 16:32
  • @zzzzBov Ah, in fact I've already upvoted this. :)
    – Doorknob
    Jan 19, 2015 at 16:35

1 Answer 1


What, the annoyingly slow transition when showing spoilers is a feature, not a bug? Site designers and browser implementers, why are you deliberately making me suffer?

So, counter-feature-request: make the transition on text in spoilers instantaneous, like it's done for images.

  • I think a faster transition (2-300ms) would look a little nicer, but I don't think we should get rid of it altogether.
    – zzzzBov
    Nov 20, 2014 at 0:44
  • 6
    I think that having spoilers fade in slowly is a useful feature - it gives you a (short) window of time in which you can realize that you have accidentally moused over something you didn't mean to mouse over, allowing you to avert your eyes or move your mouse elsewhere or something.
    – senshin
    Dec 20, 2014 at 1:00
  • 1
    I am with Gilles on this - slow transitions just make everything slower and more annoying on the internet. Please make it immediate.
    – Rory Alsop
    Jan 19, 2015 at 9:00

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