TS Is it possible to loop through keys of a type?

Question

Is it possible to loop over a type definition?

A simple type like:

interface Budget {
      bills: number;
      transportation: number;
}

And then something like:

Object.keys(Budget).map((item) => etc...)

Obviously the above doesn't work, is something like this possible? So that I don't have to create an object of type Budget whenever I want to utilize built in functions?

Answer 1

The answer is no. Types are removed by the transpiler before runtime. In your case, the Budget reference will be undefined as no object named Budget exists in the transpiled code which is actually executed.