One screen of a multi-screen interface. Only one screen shows at a time: the first, until a button runs go:name or back.
No problems. The parser accepted every line.
namenameThe screen's name, used by go:name. The visible screen's name is in {screen}.requiredtitlestringA heading shown at the top of the screen.—gapnumberSpace between children in pixels (default 14).14ifconditionShow only when this expression is true, e.g. if=done or if={count>0}. Every element takes it.—tipstringA short explanation shown on hover, keyboard focus or a tap, e.g. tip="Orders not yet shipped": for a term or a number some people won't know, instead of more words on screen. It makes the element a Tab stop if it isn't one. Every element takes it.—Children: any elements.
Only inside: the top level