Back and forward buttons

ui.BackButton and ui.ForwardButton create buttons going back and forward in a router's history, as in the toolbar of Finder or a browser: disabled at the ends of the history, and showing a chevron. Give them the router, a *ui.Router in your state:

ui.Toolbar(c, func() {
	ui.BackButton(c, app.router)
	ui.ForwardButton(c, app.router)
	ui.Text(c, app.router.Title()).Bold()
})

A right click lists the pages to go back or forward to, nearest first, by their titles (a route's Title), or their paths without one; choosing one goes there at once.

The buttons are a shortcut for what the keys already do: Cmd+[ and Cmd+] on macOS, Alt+Left and Alt+Right elsewhere, and the side buttons of a mouse.

Accessibility

Assistive technology sees buttons named "Back" and "Forward", unavailable at the ends of the history.