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Hacker News: mark stories after upvoting

After you upvote, it recolours the title and dims the arrow so you can see which stories you already backed.

Code to copy

/* Dim the upvote arrow once a story has been upvoted */
.athing:has(.votearrow[style*="visibility: hidden"]) .title .titleline a {
  color: #1a8917 !important;
}
.votelinks:has(.votearrow[style*="hidden"]) {
  opacity: 0.4 !important;
}

How to use this example

1. Copy the code with the button above.
2. Install JustZix (2 minutes) and open the extension on the target page.
3. Add a new rule matching that page.
4. Paste the code into the rule's CSS panel and save — the effect appears instantly.