Build Shiny Text from zero.

Write down the smallest public API for Shiny Text. Keep visual decisions in props so the a restrained light sweep across a label can be reused without rewriting the component.

// Local source: src/ts-tailwind/TextAnimations/ShinyText/ShinyText.tsx
// Start with the smallest visible version of ShinyText.

type ShinyTextProps = {
  className?: string;
  color?: string;
};

export function Example({ className, color = "#ff2a2a" }: ShinyTextProps) {
  return (
    <div className={className} style={{ color }}>
      {/* Add the Shiny Text behavior here. */}
    </div>
  );
}

Render the readable fallback before adding motion. The component should still communicate its purpose when JavaScript is delayed or motion is reduced.

Clamp numbers, handle an empty value, and measure the real container instead of assuming the viewport. This removes most edge-case bugs before the animation starts.

Keep markup, state, and animation calculations in separate layers. For Shiny Text, the visual structure should remain stable while a restrained light sweep across a label changes over time.

Add the core rule only: a restrained light sweep across a label. Use one source of truth for the active value and keep pointer, scroll, or timer listeners passive where possible.

Start requestAnimationFrame only when a value changes. Keep the frame id in a ref, interpolate toward the target, and stop when the difference is below a small threshold.

Test narrow mobile widths, wide desktop containers, and text wrapping. Prefer CSS dimensions and ResizeObserver over hard-coded pixels tied to one screenshot.

Respect prefers-reduced-motion and keep a non-motion state. Keyboard focus, readable labels, and a useful static result matter more than a decorative effect.

Place Shiny Text behind a real message, card, or control. Keep content above decorative layers, preserve the MADBAK palette, and avoid letting motion compete with the hierarchy.

Check the effect on a mid-range device, remove unnecessary listeners, and keep the first release focused. Once the behavior is useful, expose only the controls that future projects really need.