one/src/platform/chartTypes.ts

One is a React framework for web, iOS, and Android apps.

import type { ColorValue } from 'react-native'

// Swift.Chart takes Expo UI's Chart props (@expo/ui/swift-ui Chart), so a chart
// written for Expo renders unchanged.
export type ChartType = 'line' | 'point' | 'bar' | 'area' | 'pie' | 'rectangle'
export type ChartPointStyle = 'circle' | 'square' | 'diamond'
export type ChartDataPoint = Readonly<{
  // a label string plots on a categorical axis, a number on a numeric one.
  x: string | number
  y: number
  color?: ColorValue
}>
export type LineChartStyle = Readonly<{
  dashArray?: readonly number[]
  width?: number
  pointStyle?: ChartPointStyle
  pointSize?: number
  color?: ColorValue
}>
export type AreaChartStyle = Readonly<{ color?: ColorValue }>
export type BarChartStyle = Readonly<{ cornerRadius?: number; width?: number }>
export type PieChartStyle = Readonly<{ innerRadius?: number; angularInset?: number }>
export type PointChartStyle = Readonly<{ pointStyle?: ChartPointStyle; pointSize?: number }>
export type RectangleChartStyle = Readonly<{ color?: ColorValue; cornerRadius?: number }>
export type RuleChartStyle = Readonly<{
  color?: ColorValue
  lineWidth?: number
  dashArray?: readonly number[]
}>