Unique identifier for the layer/trace
OptionalnameWhat this layer is, when the producer named it — see MaidrLayer.name. Announced on a layer switch in place of the trace type, which cannot tell two layers of one kind apart.
OptionalintersectionsArray of audio states for all lines that intersect at the current point. Used for intersection-aware audio playback in multiline plots. null/undefined for normal points (single line or no intersection).
OptionalgroupNumber of groups/series in the plot. Only present for multiline plots where plotType === 'multiline'.
OptionalgroupLabel and name of the group/series the cursor is currently on, e.g.
{ label: 'Group', value: 'Series 1' }. Only present for multiline
plots (plotType === 'multiline') whose data names its groups; absent
when the spec authors no names, so consumers can omit group wording
rather than announce a positional placeholder.
OptionalorientationPlot orientation, if applicable (e.g. bar, box, violin).
Extended trace state for layer switching mode with navigation indices.