paths

Paths<Type> constructs a union type by picking all possible paths for type Type

interface Company {
  name: string;
  employees: { name: string }[];
}

type CompanyPaths = Paths<Company>;
//   ^? 'name' | 'employees' | `employees.${number}` | `employees.${number}.name`

It supports:

• Arrays
• Object types
• Tuples
• As a side effect of number, float number access for arrays

⚠️ Limitations:

• It doesn't recursively call it on NonRecursiveType, i.e. Builtin, Promise, ReadonlyMap and ReadonlySet

TS Playground – https://tsplay.dev/mL3BZN