DOM lib is missing Intersection Observer API on window global #16255

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1. Mohamed Hegazy (mhegazy)

   added

   Help WantedYou can do thisYou can do this

   Domain: lib.d.tsThe issue relates to the different libraries shipped with TypeScriptThe issue relates to the different libraries shipped with TypeScript

   on Jun 6, 2017
2. Mohamed Hegazy (mhegazy)

   added this to the CommunityThis milestone has been deleted milestone on Jun 6, 2017
3. mhegazy commented on Jun 6, 2017

   

   Mohamed Hegazy (mhegazy)

   on Jun 6, 2017

   Contributor

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   PRs welcomed. You can find more information about contributing lib.d.ts fixes at https://github.com/Microsoft/TypeScript/blob/master/CONTRIBUTING.md#contributing-libdts-fixes.
4. Mohamed Hegazy (mhegazy)

   added

   BugA bug in TypeScriptA bug in TypeScript

   on Jun 6, 2017
5. remojansen commented on Jun 14, 2017

   

   Remo H. Jansen (remojansen)

   on Jun 14, 2017

   Contributor

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   Can this issue be closed? Looks like the change has already been merged into master?
6. OliverJAsh commented on Jun 14, 2017

   

   Oliver Joseph Ash (OliverJAsh)

   on Jun 14, 2017

   Last edited by OliverJAsh

   ContributorAuthor

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   Aha, looks like they are in the typings, just not exposed on the window interface:

   new IntersectionObserver(() => {}); // no error
   window.IntersectionObserver // error: Property 'IntersectionObserver' does not exist on type 'Window'.
7. Oliver Joseph Ash (OliverJAsh)

   changed the title [-]DOM lib is missing Intersection Observer API[/-] [+]DOM lib is missing Intersection Observer API on window global[/+] on Jun 14, 2017
8. Johan Gorter (johan-gorter)

   added a commit that references this issue on Aug 29, 2017

   Fixes microsoft#16255: DOM lib is missing Intersection Observer API o…

   ...

   This issue will close once commit 6813a0b is merged into the 'master' branch.

   6813a0b
9. Hiswe commented on Nov 8, 2018

   

   Hiswe (Hiswe)

   on Nov 8, 2018

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   As a temporary fix

   export {}
   declare global {
     interface Window {
       IntersectionObserver: typeof IntersectionObserver
     }
   }

   👍React with 👍7Reacted by Kagami Sascha Rosylight, roman, Rodrigo Valença, Tushar Tilwani, Kyle Holmberg, Maximilian Lindsey and Juan Picado
10. Ryan Cavanaugh (RyanCavanaugh)

    modified the milestones: Community, Backlog on Mar 7, 2019
11. felipedrumond commented on Dec 19, 2020

    

    Felipe Drumond (felipedrumond)

    on Dec 19, 2020

    Last edited by felipedrumond

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    IntersectionObserverEntry lacks isVisible property.
    Chrome Version 87.0.4280.88

    

    Edit: after a quick test, this isVisible seems to be always false.

    👍React with 👍2Reacted by Alexander and Brettell
12. Andarist commented on Feb 12, 2023

    

    Mateusz Burzyński (Andarist)

    on Feb 12, 2023

    Contributor

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    This has been added in 3.6, the issue can be closed
13. Oliver Joseph Ash (OliverJAsh)

    closed this as completedon Feb 13, 2023
14. microsoft

    locked as resolved and limited conversation to collaborators on Oct 21, 2025