Native Smooth Scroll Polyfill – smoothscroll.js
smoothscroll.js is a lightweight, configurable, Vanilla JavaScript polyfill for native smooth scroll using CSS scroll-behavior: smooth property.
JavaScript & CSS Polyfill
Pure JavaScript Native Lazy Loading Polyfill
A small vanilla JavaScript polyfill for the loading=”lazy” attribute.
CSS Paint API Polyfill
This is a JavaScript Polyfill to implement the CSS Paint API on web browsers that do not support it.
CSS Hyphenation Polyfill – Hyphenopoly.js
Hyphenopoly.js is a JavaScript polyfill for those browsers/user agents that don’t support the CSS hyphenation.
HTML5 Dialog Element Polyfill
A JavaScript polyfill for the HTML5 dialog element to create interactive dialog UI components on all major browsers.