![]() Important disclosure: we're proud affiliates of some tools mentioned in this guide. How To Use Type Guards To Perform Runtime Type Checking In TypeScript.How To Use Third-Party Libraries And Tools To Check Types In TypeScript. ![]() ![]() It's like holding a magnifying glass up to the code, inspecting each piece of evidence to build a picture of the data's true nature. With the typeof operator, you can gather clues about the data type of a variable or expression and determine whether it's a string, number, boolean, or any other TypeScript type. One of the core features of TypeScript is the ability to check the type of a variable or expression at compile-time, using the typeof and instanceof operators.Ĭhecking the type of a variable or expression in TypeScript is like being a detective, trying to figure out the identity of an unknown suspect. TypeScript is a statically-typed language that enables developers to catch type-related errors before their code is even run.
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