keyof to Validate a Member's Name
Explore the keyof keyword in TypeScript and learn to validate member names within interfaces or types. Understand how to use generics with keyof to restrict function parameters and achieve static validation of property names and types, enhancing your code safety and correctness.
We'll cover the following...
We'll cover the following...
Definition and goals
keyof is a subtype of string that allows us to extract members’ names from a type or from an interface. The main goal of keyof is to define a set of valid members’ names. For example, you may have a public function that takes the direction as a string for convenience. Defining this parameter as a string would open the door to accepting anything. However, using the keyword ...