TypeScript Fundamentals: Mastering the Core Basic Types (string, number, boolean) TypeScript Fundamentals: Mastering the Core Basic Types (string, number, boolean) The first step for any "JavaScript" developer transitioning to "TypeScript" is mastering "type annotation". The three core "basic types"—"string", "number", and "boolean"—are the foundation of "type safety", helping you "eliminate runtime errors" before your code ever executes. "TypeScript" is a superset of "JavaScript" that compiles to plain JavaScript. Its main advantage is its optional, static typing system. While JavaScript is dynamically typed (meaning variable types can change at runtime), TypeScript introduces "type safety", allowing developers to declare the intended type of a variable, function parameter, or object ...