Modernizr vs A-Frame: What are the differences?

Developers describe Modernizr as "Respond to your user’s browser features". It’s a collection of superfast tests or detects as we like to call them which run as your web page loads, then you can use the results to tailor the experience to the user. It tells you what HTML, CSS and JavaScript features the user’s browser has to offer. On the other hand, A-Frame is detailed as "A web framework for building virtual reality experiences". It allows you to make WebVR apps with HTML and an Entity-Component system. Works on Vive, Rift, Daydream, GearVR, desktop.

Modernizr belongs to "JavaScript Compilers" category of the tech stack, while A-Frame can be primarily classified under "Javascript Utilities & Libraries".

Some of the features offered by Modernizr are:

• Easy to deliver tiered experiences
• Make use of the latest and greatest features in browsers
• Without leaving less fortunate users high and dry.

On the other hand, A-Frame provides the following key features:

• Html-based
• Entity-component system
• Webvr

Modernizr and A-Frame are both open source tools. Modernizr with 23.9K GitHub stars and 3.04K forks on GitHub appears to be more popular than A-Frame with 10.4K GitHub stars and 2.52K GitHub forks.