Custom Mapped Type
Explore creating custom mapped types in TypeScript to improve your code efficiency. Understand how to enforce non-nullable types, use conditional properties based on existing fields, and apply type constraints that prevent compilation errors. This lesson guides you through practical examples to master advanced type mapping techniques.
We'll cover the following...
We'll cover the following...
Creating a “NonNullable” type
The first custom type shows how to use never to tell TypeScript to not compile if a custom map is not respected. The code map is a generic variable that is neither undefined nor null. In the ...