Draggable is a modular drag & drop library, allowing you to start small and build up with the features you need. At its most basic, Draggable gives you drag & drop functionality, fast DOM reordering, accessible markup, and a bundle of events to grab on to.
It supports all standardized named character references as per HTML, handles ambiguous ampersands and other edge cases just like a browser would, has an extensive test suite, and handles astral Unicode symbols just fine.
Lozad.js is advanced performant Lazy Loader using Intersection Observer API.
It is written with an aim to lazy load images, ads, videos or any other element using the recently added Intersection Observer API with tremendous performance benefits.
Rangy also comes with optional modules, each of which comes in a separate .js file.
Picostyle is ultra lightweight CSS-in-JS library. Picostyle works well with Media Queries, Pseudo-element and Pseudo-classes.