[Problem/Bug]: visibilitychange doesn't fire when parent window is minimized or covered
pushkin- opened this issue · 2 comments
What happened?
Reopening this issue: #2681
The visibilitychange event doesn't fire when the window hosting a webview2 control is minimized or covered by another window. This works correctly in Electron, because they handle it themselves
The closed issue said "currently, it's by design" and proposed a workaround (for just the minimize issue, not the other one).
I think it would be nice if they baked this workaround into WebView2, so the browser events fire as expected, by checking the hosting window.
Importance
Moderate. My app's user experience is affected, but still usable.
Runtime Channel
Stable release (WebView2 Runtime)
Runtime Version
129.0.2792.89
SDK Version
1.0.2535.41
Framework
Winforms
Operating System
Windows 11
OS Version
22631.4317
Repro steps
- launch minimal app
- open devtools and execute
document.addEventListener("visibilitychange", () => console.log(document.visibilityState), true) - minimize the window or cover it fully by another window and notice that you don't get any logs
Repros in Edge Browser
No, issue does not reproduce in the corresponding Edge version
Regression
No, this never worked
Last working version (if regression)
No response
And handling the other case and detecting when a window is covered by another seems to require a timer that fires periodically and sets WebView::Visible to false when covered. This means that when you uncover the window, there will be a period of time when it's just black.
Making the timer fire way more frequently (and same for other windows) seems suboptimal.