Platform support

NatUI is still in Alpha. Support claims distinguish implementation, compilation, and real-window verification.

Windows differences

• Toolbar search items render in the left region. Rebuilding the toolbar drops current search text and focus.
• DatePicker uses a date-only control. A dateTime value displays its date portion and emits YYYY-MM-DD; a time value cannot be represented and leaves the native value unchanged.
• Rows nested in list sections are not individually selectable, and list row badges are not rendered.
• Toggle and picker styles, plus text-field secure mode, are fixed when the control is created.
• Sheet uses an in-tree overlay. Alerts, popovers, and menus use popup layers.
• Split view ignores minimum and maximum sidebar widths. It has no native visibility affordance, so visibility is changed only through the React value prop and Windows does not emit onChange.
• Alert supports one cancel button and two other buttons. Extra buttons are dropped, and destructive styling is not shown.
• Table sort indicators are text arrows rather than native column-header indicators.
• Mixed element children inside Text are dropped, while button and toggle mixed labels are supported.
• Spacer inside ZStack collapses.
• Image padding and background are not painted.
• Only the prominent button variant has distinct styling.
• Container foreground color does not cascade, and rounded panel backgrounds do not clip children.

macOS details

• Table uses a list-based fallback on macOS 14.0 through 14.3.
• Tab icons and badges are currently not rendered in the native tab label.
• The host supports embedded JavaScriptCore execution.

These are current implementation details, not promises of permanent divergence.