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Vimeo: reveal data-test-id values

Shows the data-test-id attribute value as a yellow label above every element that carries it.

Code to copy

/* Reveal data-test-id values as labels for easier inspection */
[data-test-id] {
  position: relative !important;
}
[data-test-id]::before {
  content: attr(data-test-id);
  position: absolute;
  top: 0;
  left: 0;
  background: #ffeb3b;
  color: #000;
  font: 10px monospace;
  padding: 1px 4px;
  z-index: 99999;
  pointer-events: none;
}

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.