Check if the browser supports passive event listeners.
A polyfill for the element internals specification
API for finding out what browsers support a particular feature
Script to feature detect if browser support WebP.
JS code that gives you two functions: i) hasEvent(Node elm, String event) ii) getEvents(Node elm)...
A small, fast delegated event library for JavaScript.
CSS feature detection for selectors, properties, at-rules and media-queries
A clean and opinionated event-handling library for the browser and Node.js. Available as ES6 modu...
Miraculous :checked pseudo-class polyfill (for IE8 and below)
EventListener Polyfill for IE
Javascript Event Manager for handlers, listeners and delegates
Support certain HTML 5 attributes with javascript, but only if the browser doesn't already suppor...