Adaptive Caret

Characters appear one at a time as if typed, usually followed by a blinking caret.

Add a "Typewriter" effect (also called typing animation or typing text) to [where].
The characters should appear one at a time at a steady typing pace, with a caret right after the last typed character that blinks a few times once typing is done.
Play it once rather than looping, let screen readers read the full text right away, and show the full text for users who prefer reduced motion.

The default arrow is replaced by a styled dot or ring that changes over interactive elements.

Add a "Custom Cursor" (also called an animated cursor or cursor replacement) to [where].
Replace the default arrow with a small dot that tracks the pointer exactly and a ring that follows a little behind, and let the ring grow smoothly while it is over links and buttons.
Keep the normal cursor on touch devices and in text fields, and never let the custom cursor block clicks.

A circle cursor inverts the colors beneath it using mix-blend-mode difference.

Add a "Blend-Mode Cursor" (also called a difference cursor or inverting cursor) to [where].
Replace the pointer with a solid circle that sits directly under it with no lag and inverts the colors of the text and shapes it passes over.
Keep the blending contained to that area so it does not mix with the rest of the page, make sure it still inverts clearly in dark mode, and keep the normal cursor on touch devices.

A shape or label trails the pointer with a spring or eased delay.

Add a "Cursor Follower" (also called a following pointer or smooth cursor) to [where].
A small round marker should trail the pointer with a soft, eased delay and glide to a stop right where the pointer rests, without bouncing.
Keep the real pointer visible, never let the marker block clicks, and leave it out on touch devices.

A preview image follows the pointer while hovering a text list item.

Add a "Cursor Image Hover" effect (also called hover image follow or image preview on hover) to [where].
While the pointer is over a text list item, a small preview image of that item should float beside the pointer, following it with a slight smooth lag and sliding to the next image when the pointer moves to another item.
The preview must never block clicks on the list, and the list should stay fully usable without it on touch and keyboard.