Standards proposal would allow annotations to be checked by external type checkers like TypeScript but treated as comments by the JavaScript engine.

Could JavaScript evolve to support a native type system—without needing TypeScript? A new proposal from the TypeScript team, submitted to ECMAScript’s TC39 committee, suggests exactly that. It ...

Microsoft announced an ambitious project to inject type syntax into ECMAScript, the official JavaScript standard. While that might sound an awful lot like TypeScript, it's different. The company is ...

JavaScript variables hold a wide variety of information and can be used with virtually any data type. Here's how to use variables to store numbers, text strings, objects, and more.

Microsoft is opening up Excel to developers with a new JavaScript API. It will let developers use custom data types like images, cards, and arrays.