Modernizr vs Emscripten: What are the differences?

What is Modernizr? 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.

What is Emscripten? An Open Source LLVM to JavaScript compiler. This allows applications and libraries originally designed to run as standard executables to be integrated into client side web applications.

Modernizr and Emscripten belong to "JavaScript Compilers" category of the tech stack.

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, Emscripten provides the following key features:

• Compile C and C++ code into JavaScript
• Compile any other code that can be translated into LLVM bitcode into JavaScript
• Compile the C/C++ runtimes of other languages into JavaScript

Modernizr and Emscripten are both open source tools. Modernizr with 24K GitHub stars and 3.03K forks on GitHub appears to be more popular than Emscripten with 17.9K GitHub stars and 2.12K GitHub forks.