TypeScript | Immutable | proper way of extending Immutable.Map type

Question

I have a react-redux application written in typescript with immutable package. There I have a data, which comes from api and in store I pack it to Map. In all application th

Answer 1

Leaving that here in case it helps someone:

import { Map } from 'immutable';

export interface ImmutableMap extends Omit, 'set' | 'get' | 'delete'> {
    set: (key: AKeyOfThatJsObject, value: ValueOf>) => ImmuMap;
    get: (key: AKeyOfThatJsObject) => ValueOf>;
    delete: (key: AKeyOfThatJsObject, value: ValueOf>) => ImmuMap;
}

It's really working great for us!

We use it like so: const aMap: ImmutableMap

Example Usage:

type BarType = { bar: string };

const foo: BarType = {
    bar: 'abc';
};
const immutableBar: Immutable = Map(foo);
// immutableBar.get suggests bar as the key, and knows that the result is a string.