• One tip node per widget. A title waits about a second, cannot be styled and cannot carry a second line, which is no use on a rail of near-identical glyphs or on a bar of bare icons. Specs are read at show time, because a group button stands for whichever tool was last picked from it.

    Parameters

    • root: HTMLElement
    • layer: HTMLElement
    • doc: Document

    Returns TipController