use Partial in nested property with typescript

Question

Say I have a type like this;

interface State {
  one: string,
  two: {
    three: {
      four: string
    },
    five: string
  }
}

I make

Answer 1

This is possible, you can create a 'deep' partial type as followed:

type DeepPartial = {
    [P in keyof T]?: DeepPartial;
};

Which can be used as followed

const state: DeepPartial = {
    two: {
        three: {
            four: '4'
        }
    }
}