The keyof operator takes an object type and produces a string or numeric literal union of its keys. The following type P is the same type as type P = "x" | "y": If the type has a string or number …

Mar 27, 2019 · To understand the keyof typeof usage in TypeScript, first you need to understand what are literal types and union of literal types. So, I'll explain these concepts first and then …

keyof is a keyword in TypeScript which is used to extract the key type from an object type. When used on an object type with explicit keys, keyof creates a union type with those keys. keyof …

Aug 22, 2024 · The TypeScript keyof operator is used to get a union of all keys in an object type. It’s useful when you want to work with the property names of an object in a type-safe way, …

Nov 27, 2023 · In this article, we will examine the keyof operator and how it is commonly used with other TypeScript features to achieve better type safety with TypeScript generics, …

Apr 25, 2025 · Learn how to use TypeScript's keyof operator with string types. Check out 5 methods with real-world examples for type-safe property access and object manipulation.

Jul 12, 2025 · Learn how to use TypeScript’s keyof operator for type-safe property access, dynamic updates, mapped types, event handling, and more with real examples.

Oct 19, 2025 · The keyof operator in TypeScript is a powerful tool when working with object keys. It allows us to write type-safe code, access object properties in a controlled way, and create …

Jan 8, 2025 · Understanding the keyof typeof combo in TypeScript allows you to create type-safe, maintainable code that adapts to changes in your objects. This approach eliminates redundant …

The keyof operator takes an object type and produces a string or numeric literal union of its keys. The following type P is the same type as type P = "x" | "y":