Sticky Text Fade

Words of a paragraph go from dim to full opacity as the user scrolls.

Add a "Text Reveal" effect (also called scroll text reveal or word-by-word reveal) to [where].
The paragraph should start dim, and as the user scrolls each word should brighten to full strength one after another, tied to the scroll position.
Scrolling back up should dim the words again, and the whole paragraph should stay available to screen readers whatever its dimming.

An element stays locked in place during a scroll range while other content or animation progresses.

Add a "Pinning" scroll effect (also called a pinned section or sticky section) to [where].
One panel should stay locked in place while the content beside it scrolls past, switching to match the step being read, and it should let go when the section ends.
Prefer native sticky positioning over hijacking the scroll, and make sure every step still reads well without the pinned panel on small screens.

Animation progress is tied directly to scroll position, so scrolling forward or back plays or rewinds it.

Add a "Scroll-Linked Animation" (also called a scroll-driven animation or scroll scrub) to [where].
The animation should move exactly with the scroll position, so scrolling down plays it forward and scrolling up rewinds it on the spot, with no time-based easing of its own.
Map the whole animation to a clear scroll range, and show a sensible static state for users who prefer reduced motion.

Letter outlines are drawn as a stroke before the fill appears.

Add a "Stroke Text Draw" effect (also called draw in text or animated stroke text) to [where].
The letter outlines should draw themselves in smoothly, and once the outlines are complete the fill should fade in.
Play it once on load, keep the word accessible as real text, and show the filled text straight away for users who prefer reduced motion.

Letters or words rotate around an axis in 3D to show the next text on their back side.

Add a "Text 3D Flip" hover effect (also called 3D flip text reveal) to [where].
When the pointer is over the text, each letter should roll over on its horizontal axis in 3D to show a new letter on its other side, one after another in a quick, smooth sweep, and roll back when the pointer leaves.
Keep the text box the same size during the flip, and show the same effect on keyboard focus.

Text warps and ripples organically, driven by scrolling or pointer movement.

Add a "Text Distortion" effect (also called organic text distortion) to [where].
A row of text should flow sideways endlessly and warp and ripple organically as it moves, as if seen through moving water, with the flow driven by the user's scrolling.
Keep the distortion light enough that the text stays legible, keep it smooth on slower devices, and turn it off for users who prefer reduced motion.