GitHub - iDev-Games/Trig-JS: The easy way to create CSS animations that react to the element's position on screen.

See it in action here: https://idev-games.github.io/Trig-JS/Install with NPM
Trig.js is a super simple and lightweight way of making CSS animations that react to the position of your HTML elements.You can also use Trig.js to trigger CSS animations once an element appears on screen.Using nothing but the power of CSS, HTML and Trig.js.

Read at GitHub