Jul 23, 2025 · Checking types in TypeScript involves methods like typeof for primitive types, instanceof for class instances, and custom type guards for complex type validation.

It just so happens that TypeScript has something called a type guard. A type guard is some expression that performs a runtime check that guarantees the type in some scope.

You can add a validating function that returns a type predicate. So you can call this function inside an if statement, and be sure that all the code inside that block is safe to use as the type you …

Discover how to use TypeScript check type to determine variable types, verify object types, implement type checking for functions, and create custom type guards.

Jun 8, 2025 · In this tutorial, I’ll explain the different ways to check types in TypeScript, including type guards, type assertions, and best practices for handling special types like any and unknown.

Jun 1, 2025 · This guide covers every aspect of type checking in TypeScript, from basic techniques to advanced patterns.

Jul 11, 2025 · I will show you how to check the type of variable in TypeScript, including primitives, objects, arrays, or custom types. In this tutorial, I’ll walk you through several practical methods …

Feb 28, 2024 · Use the typeof operator to check the type of a variable in TypeScript. The typeof operator returns a string that indicates the type of the value and can be used as a type guard …

Oct 19, 2025 · In this blog post, we will explore the various ways to check the type of variables in TypeScript, including fundamental concepts, usage methods, common practices, and best …

Jul 7, 2025 · Learn how to check the type of an object in TypeScript using various methods. Includes practical examples and best practices for TypeScript developers.