fix(macos): keep webview synced during window zoom - #1207
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Tunglies
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Apr 27, 2026
| && curr_mask.contains(NSWindowStyleMask::Titled) | ||
| { | ||
| // Just use the native zoom if resizable | ||
| ns_window.zoom(None); |
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This may be more than a patch-level change. Fixing the animation behavior requires removing the use of
ns_window.zoom(None) so AppKit no longer takes over the zoom animation path.
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Package Changes Through 9883397There are 1 changes which include tao with patch Planned Package VersionsThe following package releases are the planned based on the context of changes in this pull request.
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Related issues:
tauri-apps/tauri#13898
tauri-apps/tauri#14288
tauri-apps/tauri#15092
Possible related issues(not tested):
tauri-apps/tauri#14843
tauri-apps/tauri#5226
The
ns_window.zoom(None)path is used for normal macOS windows because Tao previously called itwhenever the window was both
ResizableandTitled. That means most regular Tauri windows usedAppKit's native smart-zoom implementation for
set_maximized.The problem is that
NSWindow::zoomperforms an internal AppKit zoom animation instead of resizing thewindow through Tao's own frame path. During that animation, the
NSWindowframe can advance before theembedded
WKWebView's native bounds and JavaScript viewport are updated. As a result, WebView contenttemporarily stays at the old size while the window has already grown, which shows up as white/blank
borders or delayed content resizing during maximize/restore.
The same issue can also be triggered by titlebar double-click, because AppKit invokes the same native
zoom behavior there. Therefore the fix avoids
ns_window.zoom(None)for maximize and interceptswindowShouldZoom:toFrame:so titlebar zoom also goes through Tao's controlled maximize path.Basline
record-before.mov
With PR
record-after.mov