Polyfill is a technology that provides modern functionality to older, less advanced web browsers or environments, ensuring consistent and efficient user experience. Essentially, it is a fallback mechanism designed to fill in the gaps in browser compatibility by mimicking the API features of recent web standards. By using JavaScript code libraries or plugins, Polyfill identifies the browser's incapabilities and adapts accordingly, essentially "polyfilling" missing features. This technique enables developers to leverage the latest technologies without alienating users of older browsers, maintaining support, and ensuring a seamless integration of innovative web features.



Modernizr is a library based on JavaScript. It is a fully open-source application. It offers a feature detection system for browsers. It is known for its user-friendliness and reliability. It offers a conducive space for testing and detection. It is widely used by web developers to receive insights into browsers and devices. It is known for its capability of delivering tiered experiences with ease.

Modernizr is known for its minimal size. It gives scope to users to create CSS rules for feature availability and apply them with ease. It is available for use on the latest browsers.

Comparison Polyfill vs Modernizr