Tested the issue in WebView and couldn't reproduce the issue.

Steps Followed:
1. Enabled WebView
2. Installed kinoseed
3. Turned off Wifi and Mobile data
4. Clicked on Load target image
5. Observed the Camera roll

Chrome versions tested:
64.0.3282.137

OS:
Android 7.0.0

Android Devices:
Samsung J7

@pacukas19 -- Could you please find the above observations and help us with a screencast for further triaging.

Thanks!!

Steps:
1. Enable WebView
2. Install kinoseed
3. Turn off Wifi and Mobile data

4. Start the app you downloaded, and press the second icon (see attached screenshot)
If "navigator.onLine" has returned false, the message "This feature requires online access. It appears you are offline" will appear.

Note: 
- If you run the application in the browser (by visiting https://kinoseed.com ), it produces the *proper result*. 
- If you install as PWA (add to homescreen), and run the application from the PWA-generated link, it produces the *proper result*.
- Only when the webview is loading the page through an app, "navigator.onLine" *produces false positive* (and the app never knows it's offline).

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Thank you for providing more feedback. Adding requester "sandeepkumars@chromium.org" to the cc list and removing "Needs-Feedback" label.

For more details visit https://www.chromium.org/issue-tracking/autotriage - Your friendly Sheriffbot

Tested the issue in WebView and could reproduce the issue.

Steps Followed:
1. Enabled WebView
2. Installed kinoseed
3. Turned off Wifi and Mobile data
4. Clicked on Load target image
5. Observed the Camera roll

Chrome versions tested:
64.0.3282.137

OS:
Android 7.0.0

Android Devices:
Samsung J7

Observing the same behaviour since M58. Hence marking this issue as Non-Regression issue.

Please navigate to below link for log's and video--
go/chrome-androidlogs/811122

Note: This issue is not observed in Mobile Chrome.

Thanks!!

hmm strange just tested the navigator.onLine property with WebView M66 (on a pixel2 device) with the sample url:
https://www.w3schools.com/jsref/tryit.asp?filename=tryjsref_nav_online

the online property appears to work ok, including when app is started with wifi switched off initially..
- are you using some specific device?
(note that there might be a slight delay when enabling wifi until the online=true, which is probably irrelevant here though)

Tried the kinoseed app and it doesn't seem to show anything when started with wifi switched off.. this might be due to development device with next version of android.. however I would expect it to work since it works when wifi is enabled..

Tim, as explained above, the false positive happens when a *compiled android app is loading the webview*.

Just waited 3 minutes after turning off wifi and mobile data, and navigator.onLine still returns positive.

note: after installing the app, run the app at least once with internet access. Only then turn off the wifi (it needs to connect once to set the serviceworkes and cache resources for offline availability).

I think this is a real bug - Tim is right that navigator.online works in the provided url, but if a webview in an app runs the javascript directly, navigator.onLine is always true. Attatched in an apk that calls
WebView.evaluateJavascript("navigator.onLine", ...)
and toasts the result on a nbutton press - for me, it's showing true when wifi and data are off.

Don't think it's a (recent) regression, i reproed in 62-64.

Deleted: app-debug.apk 1.5 MB

app-debug.apk 1.5 MB Download