Markers

Reference lines and hover indicators for highlighting specific values on charts. LinearValueMarker for cartesian charts, RadialValueMarker for radial charts, MarkLine for hover crosshairs.

Import

import { LinearValueMarker, RadialValueMarker, MarkLine } from 'reaviz';

LinearValueMarker Props

RadialValueMarker Props

MarkLine Props

Value Markers on Area/Line Charts

<AreaChart
  data={data}
  series={
    <AreaSeries
      valueMarkers={[
        <LinearValueMarker value={50} color="#D740BE" />,
        <LinearValueMarker value={25} color="#F8A340" />,
      ]}
    />
  }
/>

Thick Reference Line

<LinearValueMarker value={100} color="red" thickness={3} />

Vertical Reference Line

<LinearValueMarker
  value={new Date('2024-06-01')}
  color="#2196F3"
  direction="vertical"
/>

Value Markers on Bar Charts

<BarChart
  data={data}
  series={
    <BarSeries
      valueMarkers={[
        <LinearValueMarker value={50} color="#D740BE" />,
      ]}
    />
  }
/>

Radial Value Marker

<RadialAreaChart
  data={data}
  series={
    <RadialAreaSeries
      valueMarkers={[
        <RadialValueMarker value={75} color="#FF5722" />,
      ]}
    />
  }
/>

Custom MarkLine (Hover Crosshair)

// MarkLine is included by default in AreaSeries/LineSeries
// Customize or disable it:
<AreaSeries markLine={<MarkLine strokeColor="#fff" strokeWidth={2} />} />

// Remove hover crosshair
<AreaSeries markLine={null} />

Notes

• Value markers render as horizontal or vertical lines at a specific data value
• Pass valueMarkers as an array to the series component (AreaSeries, BarSeries, LineSeries, etc.)
• MarkLine is the hover crosshair shown when mousing over area/line charts — included by default
• Linear markers support both numeric values and Date values (for time axes)