Completed Challenges

Implement the built-in ReturnType<T> generic without using it.

For example


const fn = (v

Implement the built-in Omit<T, K> generic without using it.

Constructs a type by picking all pr

If we have a type which is a wrapped type like Promise, how can we get the type which is inside th

Generic types are like function arguments.

Implement the JavaScript Array.concat function in the type system. A type takes the two argument

Your TypeScript journey starts with these building blocks.

You can create multiple names for the same type.

TypeScript can be more specific than string or number. It can remember literal values.

Index signatures allow us to handle types where the properties are a non-specific literal value.