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[Web API type definition issue] ImageData constructor missing type Float16Array #2107
Description
Summary
Missing type in constructor
Expected vs. Actual Behavior
This is a fairly recent change, the ImageData constructor now accepts Float16Array as type for data in it's constructor, see:
https://html.spec.whatwg.org/multipage/imagebitmap-and-animations.html#imagedataarray
There already is an issue on MDN to reflect this.
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
Browser support:
- Currently this is implemented in Chromium 137 and later
- The current source of Safari also has support, I haven't checked if this is already in the latest published version
Activity
Bashamega commentedon Aug 6, 2025
Hello cmahnke
Once BCD adds it, it will be added
cmahnke commentedon Aug 19, 2025
Adam Naji (@Bashamega) Are you sure it is working that way? I'm asking because the documentation comment already has the proposed change, see https://github.com/microsoft/TypeScript-DOM-lib-generator/blob/main/baselines/dom.generated.d.ts#L19070
I states that
ImageData.datamight be aFloat16Array. It returnsImageDataArray, but the definition doesn't containFloat16Array. This is closely related since the definition ofImageDataArrayis still wrong here. Interestingly@webref/idlhas this since 3.61.4Maybe a manual change is needed to reflect the current comment?
In any case there is a BCD issue now
Bashamega commentedon Aug 19, 2025
If it is implemented here, then wait until typescript updates it
cmahnke commentedon Aug 26, 2025
Just an update:
PR mdn/browser-compat-data#27661 which closed mdn/browser-compat-data#27547 has been merged into min and will certainly be in the next release.
Should I create a PR to remove https://github.com/microsoft/TypeScript-DOM-lib-generator/blob/main/inputfiles/removedTypes.jsonc#L401-L407 ?
cmahnke commentedon May 11, 2026
#2320 is somewhat related and already has been merged, even though Safari hasn't enabled it by default (as of merging). I assume having a API change shipped by default isn't actually required, having it implemented is sufficient.