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`declare global` is not explained anywhere · Issue #3409 · microsoft/TypeScript-Website · GitHub
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declare global is not explained anywhere #3409

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@adriancuadrado

Page URL: https://www.typescriptlang.org/docs/handbook/declaration-files/by-example.html

Issue: It doesn't explain what declare global is, how to use it, how it works, and when and why you should use it.

I think this is the most appropriate place to explain this, but I am not even sure about that. Maybe it might fit somewhere else, I don't really know.

This construct is mentioned here, but only as an example and doesn't really get into details about its mechanics.

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  1. adriancuadrado commented on Jan 18, 2026

    @adriancuadrado
    ContributorAuthor

    Martin Johns (@MartinJohns) If I, as a developer, wanted to learn more about declare global, I'd use the search bar. However, it doesn't display relevant results:

    Image

    I think I'd make sense to edit this article to include information about this since it is the article that the first result of the search functionality points to.

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