[merb]

then you should look at this library. Currently I'm skeptical about every js library, however this library makes a lot of things good.

Especially by using ES6. Also these guys made some cool addon libraries that are as small as the core library.

The only thing I dislike is that the core library is a single source file. Why do people create source files with < 1000 lines..

[developit]

It started as a CodePen. Thankfully, someone switched the build to use Rollup, which makes it very easy to move things around. Modular structure (in terms of files) will be part of the 3.0 major bump.