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GitLab: sticky diff file headers

Keeps the file-name header pinned at the top while you scroll through long diffs.

Code to copy

/* Keep diff file headers visible while scrolling through changes */
.diff-file .file-title,
.diff-file .js-file-title {
  position: sticky !important;
  top: 48px !important;
  z-index: 110 !important;
  background-color: var(--gl-background-color-default, #fff) !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.