Babel started out as a transpiler to let you write the latest version of the ECMAScript specification but ship to environments that don't implement those features yet. But it has become much more than that. "Compilers are the New Frameworks" says Tom Dale and I could not agree more. We're seeing more and more compile-time optimizations for libraries and frameworks. I'm not talking about syntax extensions to the language, but simple code transformations that enable patterns that would be difficult to accomplish otherwise.

Getting to work your way around a new code base always poses its challenges, and Babel was no exception.

I’ve been working with Babel as part of the Google Summer of Code 2017 program, working to update Babel transforms and the Babylon parser to accommodate changes to specifications and implementing new features.

Here’s a few things I’ve learnt from my adventures so far.

We landed the parser support for the stage-2 decorators spec last week at Babylon — the parser for Babel. If you don’t know what a decorator is, the gist of it is that a decorator gives some concise syntax to affect the definition of a class or a class method which you decorate.

For the first time, Babel is participating in Summer of Code! Although we forgot to make an announcement post earlier, here's our progress update 😊

We are moving the migration guide to a docs page instead of a blog post!

Check out v7-migration-api!​

We are moving the migration guide to a docs page instead of a blog post!

Check out v7-migration!​

In this release: multiple improvements to the react-constant-elements plugin by @STRML, some codegen optimizations, and lots of bug fixes! Thanks to @loganfsmyth for the release + reviews!

• Some History
• Current Status
• The Future
• Community

object-rest-spread works standalone and a few new plugin options APIs were added!

More flow updates, and lots of fixes!