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[Web API type definition issue] `Element.requestFullscreen` should be optional

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#2,211 8 comments 0 reactions 0 assignees View on GitHub

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Assessment

Difficulty
2/5
Estimated time
1-3 hours
Newbie friendliness
45/100
Issue type
Bug
Clarity
Mostly clear
Activity status
Stale
Tech stack
typescript
Domain
api

Research direction

Start by locating the Element.requestFullscreen definition in this repository and checking how optional Web API members are represented. Review the related generation or test entry point before changing anything. Done means the generated TypeScript definition permits the member to be absent and the relevant checks pass.

Written by the indexing model from the issue text.

Description

lib.d.ts bug
Summary

typeof document.documentElement.requestFullscreen is undefined in iOS Safari

Expected vs. Actual Behavior

typeof document.documentElement.requestFullscreen

Expected: not defined in iOS 26.0.1 Safari (and probably in the webview)
Actual: always a function

Playground Link

No response

Browser Support
  • This API is supported in at least two major browser engines (not two Chromium-based browsers).
Have Tried The Latest Releases
  • This issue applies to the latest release of TypeScript.
  • This issue applies to the latest release of @types/web.
Additional Context

Suggested change will enforce optional chaining for safer runtime code.

document.documentElement.requestFullscreen?.()
Dominant language
TypeScript
Stars
740
Forks
474
Avg merge
2d 8h
Merged PRs (30d)
15

Contributor guide

No contributing guide indexed for this repository

First steps

  1. Read the whole issue, then the project's contributing guide.
  2. Comment on the issue to say you are picking it up — it saves two people doing the same work.
  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

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