navigator.userAgentData.getHighEntropyValues is not working on Chrome on iPhone

[pm-harshad-mane]

Type of issue

NOT A PREBID BUG/ISSUE

Description

Here is demo page provided by Chrome Team, https://user-agent-client-hints.glitch.me/ on the page https://developer.chrome.com/docs/privacy-security/user-agent-client-hints

On Desktop, you can see navigator.userAgentData.getHighEntropyValues returns the data but it does not return any data on Chrom eon iPhone.

Prebid relies on this API to populate device details
https://github.com/search?q=repo%3Aprebid%2FPrebid.js%20getHighEntropyValues&type=code

Am I missing something?

Steps to reproduce

Visit https://user-agent-client-hints.glitch.me/ on Dsktop and mobile devices.

Test page

https://user-agent-client-hints.glitch.me/

Expected results

The API should return data on both Desktop and mobile devices.

Platform details

Tested on iPhone 14, Chrome 126

[patmmccann]

Maybe post at https://github.com/WICG/ua-client-hints/issues

[patmmccann]

Also I bet our friends at 51 degrees may have information cc @jwrosewell

[pm-harshad-mane]

Thanks @patmmccann , opened WICG/ua-client-hints#367

[pm-harshad-mane]

Got below Feedback on WICG/ua-client-hints#367

As Chrome for iOS uses WebView, I don't believe it supports any JavaScript APIs not part of Safari on iOS: 

https://developer.mozilla.org/en-US/docs/Web/API/NavigatorUAData/getHighEntropyValues

[pm-harshad-mane]

Closing as it is as per design.