Pie Chart

Installation

Examples

Props

Schema

Type aliases from this item's source — use them to shape the data you pass in.

interface ChartTheme {
  colors: string[]
  textColor: string
  axisColor: string
  splitLineColor: string
  tooltipBg: string
  tooltipBorder: string
  tooltipText: string
  bgColor: string
  /** The app's accent, for the one highlighted element on a chart or map —
   *  a selected route, a focused bar. Category series keep using `colors`. */
  accentColor: string
  /** Out-of-bounds / failure colour for charts that encode good vs bad
   *  rather than a category — control limits, error series. CSS-level marks
   *  can use `var(--destructive)` directly; this exists because ECharts needs
   *  a resolved colour string on the canvas. */
  dangerColor: string
}

Used by

Files installed (3)

• src/lib/components/ui/charts/pie-chart/PieChart.svelte3.3 kB

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  <script lang="ts" module>
    import type { HTMLAttributes } from 'svelte/elements'
  
    export interface PieChartProps extends HTMLAttributes<HTMLDivElement> {
      data: Record<string, any>[]
      nameField?: string
      valueField?: string
      height?: number | string
      donut?: boolean
      option?: any
      /** Accessible name announced for the chart image. Defaults to "Chart". */
      ariaLabel?: string
      ref?: HTMLDivElement | null
    }
  </script>
  
  <script lang="ts">
    import { init, use, type EChartsType } from 'echarts/core'
    import { CanvasRenderer } from 'echarts/renderers'
    import { PieChart as EChartsPieChart } from 'echarts/charts'
    import { LegendComponent, TooltipComponent } from 'echarts/components'
    import { cn } from '$lib/utils'
    import { chartTheme } from './useChartTheme'
  
    use([CanvasRenderer, EChartsPieChart, TooltipComponent, LegendComponent])
  
    let {
      class: className,
      data,
      nameField = 'name',
      valueField = 'value',
      height = 300,
      donut = false,
      option,
      ariaLabel,
      ref = $bindable(null),
      ...restProps
    }: PieChartProps = $props()
  
    let chartEl: HTMLDivElement | null = $state(null)
    let chart: EChartsType | null = $state(null)
  
    const heightStyle = $derived(`height: ${/^\d+$/.test(String(height)) ? `${height}px` : String(height)}`)
  
    const mergedOption: any = $derived.by(() => {
      const theme = $chartTheme
      const chartData = data.map((d) => ({
        name: d[nameField],
        value: d[valueField],
      }))
  
      const series = [
        {
          type: 'pie',
          radius: donut ? ['45%', '70%'] : '65%',
          center: ['50%', '45%'],
          itemStyle: { borderWidth: 0 },
          label: { show: false },
          data: chartData,
        },
      ]
  
      // Per-index series merge — partial overrides keep computed `type`/`data`.
      const userOption: any = option ?? {}
      const { series: userSeries, ...userRest } = userOption
      const mergedSeries = Array.isArray(userSeries)
        ? series.map((s, i) => ({ ...s, ...(userSeries[i] ?? {}) }))
        : series
  
      return {
        color: theme.colors,
        tooltip: {
          trigger: 'item',
          backgroundColor: theme.tooltipBg,
          borderColor: theme.tooltipBorder,
          textStyle: { color: theme.tooltipText, fontSize: 12 },
          formatter: '{b}: {c} ({d}%)',
        },
        legend: {
          bottom: 0,
          icon: 'circle',
          itemWidth: 8,
          itemHeight: 8,
          textStyle: { fontSize: 11 },
        },
        series: mergedSeries,
        ...userRest,
      }
    })
  
    $effect(() => {
      if (!chartEl) return
      const instance = init(chartEl)
      chart = instance
      const ro = new ResizeObserver(() => instance.resize())
      ro.observe(chartEl)
      return () => {
        ro.disconnect()
        instance.dispose()
        chart = null
      }
    })
  
    $effect(() => {
      if (chart) chart.setOption(mergedOption, { notMerge: true })
    })
  </script>
  
  <!-- svelte-ignore a11y_no_noninteractive_tabindex -- focusable by design (Vue twin has tabindex=0 too). -->
  <div
    bind:this={ref}
    role="img"
    tabindex="0"
    aria-label={ariaLabel || 'Chart'}
    data-uipkge
    data-slot="pie-chart"
    style={heightStyle}
    class={cn('focus-visible:ring-ring w-full focus-visible:ring-2 focus-visible:outline-none', className)}
    {...restProps}
  >
    <div bind:this={chartEl} class="size-full"></div>
  </div>
  

• src/lib/components/ui/charts/pie-chart/index.ts0.2 kB

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• src/lib/components/ui/charts/pie-chart/useChartTheme.ts8.1 kB

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Raw manifest:https://uipkge.dev/r/svelte/pie-chart.json

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