Next.js Hacker News
Show HN: I made CSS-only glitch effect
46 points by stankot 5 days ago | 15 comments
  • justsomehnguy
    Doesn't work on Android DDG and FF on th site, but works in both on CodePen.
    • stankot
      That is weird, because it is HTML/CSS only. Do you see anything that would help me debug it? Could it be that an add-on (content blocker) messes up with it? I don't have an android device to test. I don't see any issues on desktop and ios though.
      • justsomehnguy
        Quite amusingly:

        site glitch doesn't work on the desktop FF too, not in any of three, with various staleness but nothing too old

        works on the CodePen, but if I replace CSS there with the response of glitch.css from the Network tab - it blanks and never shows anything

        no ad-blockers, no errors while loading

        • stankot
          Thanks for checking, I’ll try to see what is going on.
          • justsomehnguy
            Shoulda checked it in the first place:

                GET https://muffinman.io/js/posts/glitch/parser.js [HTTP/1.1 200 OK 138ms]

    Uncaught TypeError: animation is undefined
        parse https://muffinman.io/js/posts/glitch/parser.js:263
        Monorail https://muffinman.io/js/posts/glitch/monorail.js:327
        <anonymous> https://muffinman.io/js/posts/glitch/index.js:10
        <anonymous> https://muffinman.io/js/posts/glitch/index.js:5
            FF 138.0.1 (May 1, 2025)
            • stankot
              I've figured it out. The error means that this call fails:

                  const animation = animationElement.getAnimations()[0];
              As Firefox supports `getAnimations` since 2020, I figured something else is messing up with it. I've tried to enable "reduced motion" in the system settings and it broke the animation!

              It is because I had force-disabled all animations on the site when this option is enabled.

              I patched it, it should work now. Thank you for your help!

              EDIT: typo

              EDIT2: I also added simple error handling to display a message if parsing the animation fails.

    • Semaphor
      Works for me on the site, FF Android
    • dahrkael
      works for me in android DDG
  • lunaps
    That's truly impressive, never have seen sth like that before with CSS
  • dlouxgit
    This CSS glitch effect is so dope! Makes me wanna try it on my own website.
    • stankot
      Go for it, and share a link!
  • mdrzn
    Very interesting and beautiful effect!
  • nmoya
    super cool!