[Proposal] SetNonNullable

[xenoterracide]

I honestly thought SetRequired did this. example of expected behavior

type Optional<T> = T | undefined | null;
type Foo = {
   bar: Optional<string>;
   foo?: string | null;
   baz?: string;
};

type NonNullableFoo = SetNonNullable<Foo, 'bar' | 'foo'>;

// would be equivalent to

type ManualNonNullableFoo = {
   bar: string;
   foo: string;
   baz?: string;
};

[sindresorhus]

I honestly thought SetRequired did this.

⬇️

Create a type that makes the given keys required.

[sindresorhus]

This seems useful though. I wonder if we could just overwrite the built-in NonNullable version with a more powerful one that also accepts which keys to apply to, as discussed in #171.

[papb]

@sindresorhus However, note that SetRequired does more than just mark the given keys as required - it also strips undefined from them.

[joealden]

I believe this can be closed now that #431 has been merged?