How do you explicitly set a new property on `window` in TypeScript?

Question

I setup global namespaces for my objects by explicitly setting a property on window.

window.MyNamespace = window.MyNamespace || {};

Answer 1

If you are using Typescript 3.x, you may be able to omit the declare global part in the other answers and instead just use:

interface Window {
  someValue: string
  another: boolean
}

This worked with me when using Typescript 3.3, WebPack and TSLint.