verlok / vanilla-lazyload

LazyLoad is a lightweight, flexible script that speeds up your website by deferring the loading of your below-the-fold images, backgrounds, videos, iframes and scripts to when they will enter the viewport. Written in plain "vanilla" JavaScript, it leverages IntersectionObserver, supports responsive images and enables native lazy loading.

davidjbradshaw / iframe-resizer

Keep iframes sized to their content

krakenjs / zoid

Cross domain components

0x4meliorate / Mimic

Frameless Browser‑in‑the‑Browser (BitB) - No iframes, no frame‑busting issues. A single‑script Shadow DOM / MutationObserver library for realistic phishing simulations, easily injected via reverse proxy.