TypeScript is a strong-type language that supports all the features typically found in object-oriented programming languages, such as Java and C#. For example, JavaScript has no support for interface, ...

A new JavaScript API will be available to preview inside Excel later this month, which will let developers create these custom data types for inputs and outputs and enable custom functions. Excel ...

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 ...

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.

When you annotate JavaScript code to create TypeScript, most of the type information you apply will be familiar, since they’ll come from JavaScript types. But how and where you apply those types ...

Fortunately, JavaScript’s variable system is incredibly powerful and versatile. This article shows you how to use JavaScript variables to store numbers, text strings, objects, and other data types.