Chrome-style tabs across several windows, built on nativeapi's WindowDragSession and WindowManager.getWindowAtPoint — the deno desktop counterpart of flutter_browser_tabs_example.

Two browser windows open, with four and two tabs.

• Reorder: drag a tab along its strip.
• Tear off: drag a tab more than 28 px above or below the strip; it becomes a new window of the same size with the tab under the cursor. A window's only tab takes the whole window along instead.
• Merge: drag a torn-off tab over another window's strip; it joins that strip at the cursor while you are still dragging, and you can keep reordering or pull it out again.
• Move a window: drag the empty part of a strip.
• + adds a tab; closing a window's last tab closes the window; the app quits with the last window.

A press starts a pointer-only WindowDragSession, and every step after it is driven by the session's cursor position — after a merge, the target window's page never saw the press. Each webview is its own page, so a tab's page state (edited address, likes, scroll position, running timer) lives in Deno and follows the tab: Page state #n · … · moved between windows k×.

The strip takes the title bar's place: on macOS under a transparent title bar with room for the traffic lights (setContentUnderTitleBar(true)); elsewhere the title bar is hidden and the strip carries its own close button.

npm install     # at the repository root: builds the nativeapi addon
cd examples/deno_browser_tabs_example
deno task dev

Requires Deno 2.9+ (deno desktop). macOS is the platform this was checked on.