Modernizr

Modernizr is a JavaScript library that helps websites determine which advanced features and capabilities a user's browser supports. By detecting features like CSS animations, flexbox layout, or HTML5 elements, it enables developers to tailor the website’s design and functionality accordingly. This ensures a better user experience across different browsers and devices, allowing fallback options if certain features aren’t supported. Essentially, Modernizr acts as a compatibility checker, helping websites adapt gracefully to a diverse range of browser technologies.