Value axis

Live neutral value readout centered on the Y-axis. Shows mean of visible range when resting, value at crosshair when hovering. Ref-only — zero re-renders.

Primitive: ChartAxisValue

Interactive demo

Usage

import { ChartRoot, ChartAxisValue } from '@ramtt/charts'

<ChartRoot data={data} height={200}>
  <ChartAxisValue format={(v) => `${Math.round(v)} W`} />
</ChartRoot>

Props

Prop	Type	Default	Description
format	`(value: number) => string`	—	Optional value formatter (default: Math.round)
className	`string`	—	Class forwarded to the wrapping <g>