This proposal aims to enable developers to add type annotations to their JavaScript code, allowing those annotations to be checked by a type checker that is external to JavaScript. At runtime, a ...

Variables hold a wide variety of information temporarily. The JavaScript data types that can be stored in a variable include: JavaScript variables can hold a few other kinds of data, but these are by ...

With Tuesday’s release of Flow, an open source static type checker, Facebook engineers are continuing their recent efforts to seed the community at large with tools built in-house. “Flow adds static ...