Create a declaration file .d.ts file for a npm module does not have @type package

I am trying to use react-geocode with TypeScript but it does not have @type package.

I did following to make it work:

1. eject from react-react-app (this somehow made the path mapping work better and you got to add config to tsconfig.ts)
2. create react-geocode.d.ts file in src/typings (or any folder of your choosing)
3. In tsconfig.js:

{
  "compilerOptions": {
    "baseUrl": "src",
    "paths": {
      "types": ["types"],
      "store": ["store"],
      "*": [
          "node_modules/*",
          "src/typings/*" // this will make the typescript compiler find the type file
      ]
    }
  },
  "include": [
    "src"
  ]
}

Finally, put something like this in react-geocode.d.ts:

declare module 'react-geocode' {
    export function fromAddress(p: any): Promise<any>;
    export function fromLatLng(p: any, b: any): Promise<any>;
    export function setApiKey(p: any): void;
};

Now the app compiles.