OptionalcolorOptionalconnectBridge missing pairs (default false).
Optionalcurve'linear' (default), 'step' / 'stepBefore' / 'stepAfter', or 'monotone' (smooth, no overshoot)
OptionalfillSeries color alpha multiplier (default 0.25).
First edge; the name is conventional: crossings with upper are preserved.
OptionallowerCSS-pixel boundary strokes (default 0: fill only).
Second edge, with one value per first-edge sample. Non-finite pairs leave a gap.
OptionalupperOptionalxx of each sample (same length as values, finite, sorted ascending; irregular spacing is
fine). Give it for every series or none; without it samples are spaced evenly by index.
Numbers are plain values or epoch ms (axes.x.type: 'time'); Date[] implies a time axis.
Optionalyy axis of this series (2D line charts): any 'right' series opts the chart into a second y
axis with its own domain / scale / ticks (axes.y2); gridlines follow the left axis
(default: 'left'; ignored by area charts)
[r, g, b, a]in 0..1 or a CSS color ('#3b82f6','rgb(...)','hsl(...)', named)