Problem: Scroll progress indicator.

Solution#

html
<div class="sticky top-0 z-50 h-1 w-full bg-transparent">
  <div class="h-full w-1/3 bg-blue-600"></div>
</div>

Why this works#

Static structure; drive width with 3 lines of JS.

Variants#

  • Responsive: add screen prefixes to the core classes
  • Dark: pair each color utility with its dark: twin
  • Animated: add transition + a state variant for motion

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