Scroll-triggered counter
A counting number animation that starts when the stat scrolls into view.
What you're seeing
Numbers that wait — then animate from zero to their final value the moment they enter the viewport.
Where you'll see it
Stats sections, social proof callouts.
Difficulty
Very low — 1/5
Libraries that build it
GSAPcountUp.js
Ready to prompt — paste this into your AI coding tool
"Trigger countUp animation on [stat element] using IntersectionObserver, count from 0 to [value] over 2s"