Troubleshooting TypeScript window augmentation not functioning in individual modules

I would like to extend the window object with a new property. This can be achieved by adding the following code:

// global.d.ts

import { IConfig } from './src/models';
export {};

declare global {
    interface Window {
        _env: IConfig;
    }
}

However, when attempting to access this new property in a different file, an error is triggered:

// src/util.ts

// Property '_env' does not exist on type 'Window & typeof globalThis'.
export const URL = `https://example.com/${window._env.path}`;

Interestingly, when these code snippets are combined into the same file, no errors occur. Is there a way to keep them separate and still avoid errors?

My TypeScript version is 4.1.2.

Answer №1

After delving into the topic a bit deeper, I stumbled upon some pertinent information in this documentation

I successfully implemented a similar solution (albeit with a different type) in both an existing angular 8 project and svelte project by leveraging their respective polyfills.ts files for my global declaration.

Have you double-checked that your tsconfig.json is compiling everything correctly?

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