Interface: SparklineGeometry

Properties

area

area: string

d for the filled area under the line, one closed shape per unbroken run.

bars

bars: SparklineBar[]

baselineX

baselineX: number

baselineY

baselineY: number

Y of the value zero (or of the axis the bars grow from).

count

count: number

How many values were actually plotted.

first

first: SparklinePoint | null

First, lowest and highest readings (first occurrence), or null with no data.

horizontal

horizontal: boolean

Horizontal bars (horizontal: true): they grow left to right, one row per reading, and the zero line is VERTICAL, at this x.

last

last: { negative: boolean; x: number; y: number; } | null

Last point, for the end-of-series dot. Null when there is no data.

lastValue

lastValue: number | null

The last plotted VALUE, in data units.

Separate from last.y, which is a viewBox coordinate and therefore both scaled and INVERTED. Both renderers used to announce last.y in their default aria-label, so a screen reader heard "ending at 4" for a series closing at 31 — a number that means nothing to the listener and happens to move the wrong way. Added so the label can say what the reader wants.

line

line: string

d for the line. Empty when there is nothing to draw. A hole in the data BREAKS the line (a new M), so a missing reading reads as missing.

lone

lone: SparklinePoint[]

Readings with a hole on both sides. A one-point run draws no line, so a line or area sparkline marks these with a dot, or they would vanish.

max

max: SparklinePoint | null

min

min: SparklinePoint | null

points

points: SparklinePoint[]

Every plotted reading, in order — for highlights and per-point tooltips.