How to declare a global variable in TypeScript?

Question

JavaScript

onload = () => {
    const gl = getGLContext(<HTMLCanvasElement>document.getElementById('scene'));
};

How can I change it so that the const gl constant becomes global? Those. we initialize it in one file in onload, and it is available in all ts-files for use.

Answer 1

interface Window {
  someVariable: Number;
}

window.someVariable = 1;