Clip Path Tab Reveal

Animating tab text color with CSS transitions creates muddy intermediate contrast. Use dual-layer containers clipped by clip-path inset.

When an active pill glides under text, fading the text color with transition: color 200ms causes a visual bug. Halfway through the transition, the text sits over the edge of the pill while rendering a hybrid, muddy gray color.

The Dual Layer Clip Reveal

  1. –Base Layer: Render the inactive tabs in standard muted text.
  2. –Top Layer: Duplicate the tab row in solid active text color over a filled pill container.
  3. –Clip Mask: Wrap the top layer with clip-path: inset(). Animate the inset rectangle to track the active tab width and left position.

Because the top layer is physically clipped at the exact border of the pill, text on either side of the edge is rendered with 100% razor-sharp contrast.

Toggle Slow Motion Inspection in the preview above to watch the mid-transition contrast difference.