Unlike Dart, Script#, and GWT, however, TypeScript doesn't discard the syntax of JavaScript. Instead, it extends it, with the result that any JavaScript program is automatically a TypeScript ...

You implement constraints on data types using the TypeScript extends keyword. The extends keyword, however, only works with interfaces and classes, so "extends number" or "extends string" won't ...

TypeScript is particularly attractive to shops that have already invested in JavaScript for their codebase but want to make that codebase easier to maintain and extend. Since valid JavaScript is ...

The latest version of TypeScript provides developers with tools to create base classes and class hierarchies just like the other object-oriented languages. In an earlier column, I looked at what ...