Type alias DeepImmutable<T>

A type that recursively turns the proprties within a given object type T immutable.

Example

type Actual = {
 a: () => 1;
 x: string;
 s: {
   q: Nullable;
   s: {
     i: {
       x: {
         o: Maybe<Primitive>;
         n: Falsy;
       };
       e: 'foo';
     };
   };
 };
};

type Expected = {
 readonly a: () => 1;
 readonly x: string;
 readonly s: {
   readonly q: Nullable;
   readonly s: {
     readonly i: {
       readonly x: {
         readonly o: Maybe<Primitive>;
         readonly n: Falsy;
       };
       readonly e: 'foo';
     };
   };
 };
};
type T = DeepImmutable<Actual>; // T Results in: Expected
Copy