Parsley.js : Javascript forms validation.
Powerful, UX aware & Dead simple.
jsfx : This is a javascript library (with frontend) for sound effect generation.
Scrollama : Scrollama is a modern & lightweight JavaScript library for scrollytelling using IntersectionObserver in favor of scroll events. The goal of this libra...
Prototype : Easy Ajax and DOM manipulation for dynamic web applications
Headroom.js : Headroom.js is a lightweight, high-performance JS widget (with no dependencies!) that allows you to react to the user's scroll.
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