Some features is not supported in webview

[skyclouds2001]

What type of issue is this?

Incorrect support data (example: BrowserX says "86" but support was added in "40")

What information was incorrect, unhelpful, or incomplete?

viewing https://source.chromium.org/chromium/chromium/src/+/main:android_webview/tools/system_webview_shell/test/data/webexposed/not-webview-exposed.txt, I notice some feature should not be marked as supported in webview, but it is incorrectly marked as yes

as a simple check, most data are incorrectly marked

full list for related API:

• [x] Compute Pressure API
• [x] Speech Synthesis API (not Speech Recognition API)
• [x] Notifications API
• [x] Web Payments API
• [x] SharedWorker
• [x] Push API
• [x] Presentation API
• [x] Remote Playback API
• [x] Audio Output Device API
• [ ] Share API
• [x] Media Session API
• [ ] WebXR API
• [ ] Web Bluetooth API
• [ ] Login Status API
• [x] EyeDropper API
• [ ] File System API
• [ ] File System Access API
• [ ] MediaDevices
• [ ] Capture Handle API
• [ ] Region Capture API
• [ ] WebAuthN API
• [ ] WebOTP API
• [ ] Background Fetch API
• [ ] Periodic Background Sync API
• [ ] Web Serial API
• [ ] WebHID API
• [ ] WebUSB API
• [ ] Window Controls Overlay API
• [ ] File Handling API
• [ ] Local Font Access API
• [ ] FedCM API
• [ ] Picture-in-Picture API
• [ ] Shared Storage API
• [ ] Fenced Frames API
• [ ] Protected Audiences API

What browsers does this problem apply to, if applicable?

Chromium (Chrome, Edge 79+, Opera, Samsung Internet)

What did you expect to see?

mark those features as not-supported

Did you test this? If so, how?

no, simply check using chromium source code

Can you link to any release notes, bugs, pull requests, or MDN pages related to this?

https://github.com/chromium/chromium/blob/main/android_webview/tools/system_webview_shell/test/data/webexposed/not-webview-exposed.txt https://github.com/chromium/chromium/blob/main/third_party/blink/renderer/platform/runtime_enabled_features.json5

Do you have anything more you want to share?

No response

MDN URL

No response

MDN metadata

No response

[SamB]

What information was incorrect, unhelpful, or incomplete?

viewing https://source.chromium.org/chromium/chromium/src/+/main:android_webview/tools/system_webview_shell/test/data/webexposed/not-webview-exposed.txt, I notice some feature should not be marked as supported in webview, but it is incorrectly marked as yes

HMM, looks quite machine-friendly: I wonder if it would be practical to extract the information mechanically from the git history?

[queengooborg]

The file from Chrome's you mentioned had been taken into consideration years ago when most updates to BCD were still performed manually. Now, almost all data is collected by https://mdn-bcd-collector.gooborg.com automatically.

If BCD reports that something in WebView is supported but it's in that file, it's either because:

• It's actually supported after all, so that source file is wrong
• It's incorrectly exposed and overrides need to be added to the collector

Do you have access to WebView on Android? If so, could you test which features are actually unsupported?

[skyclouds2001]

The file from Chrome's you mentioned had been taken into consideration years ago when most updates to BCD were still performed manually. Now, almost all data is collected by https://mdn-bcd-collector.gooborg.com automatically.

Yes, as I later made some check, most old APIs seems to be correct, but some newly added API (like Shared Storage API, Fenced Frames API, which seems to be added mantually) seems to be wrong.

(Previously I only checked some items at the end of the file content)