[lupire]

Google does not write much publicly available JavaScript. They wrote their own special flavor. (Same for any hugel legacy operation)

[bilekas]

Can we get some more info on what you're reffering to ?

[jkaptur]

They're probably talking about Closure Compiler type annotations [0], which never really took off outside Google, but (imo) were pretty great in the days before TypeScript. (Disclosure: Googler)

0. https://github.com/google/closure-compiler/wiki/Annotating-J...