Beeswarm Chart

Installation

Examples

Props

Used by

Files installed (3)

• src/lib/components/ui/beeswarm-chart/BeeswarmChart.svelte5 kB

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  <script lang="ts" module>
    import type { HTMLAttributes } from 'svelte/elements'
  
    export interface BeeswarmChartProps extends HTMLAttributes<HTMLDivElement> {
      data: Record<string, any>[]
      valueField?: string
      groupField?: string
      height?: number | string
      option?: any
      /** Accessible name announced for the chart image. Defaults to "Chart". */
      ariaLabel?: string
      /** The wrapper <div>, via `bind:ref`. */
      ref?: HTMLDivElement | null
    }
  </script>
  
  <script lang="ts">
    import { init, use } from 'echarts/core'
    import type { EChartsType } from 'echarts/core'
    import { CanvasRenderer } from 'echarts/renderers'
    import { ScatterChart as EChartsScatterChart } from 'echarts/charts'
    import { GridComponent, LegendComponent, TooltipComponent } from 'echarts/components'
    import { cn } from '$lib/utils'
    import { chartTheme, mergeOptionBlock } from './chart-theme.svelte'
  
    use([CanvasRenderer, EChartsScatterChart, GridComponent, TooltipComponent, LegendComponent])
  
    // Deterministic jitter so SSR + client render identical points.
    function jitter(i: number, salt: number) {
      const x = Math.sin(i * 127.1 + salt * 311.7) * 43758.5453
      return (x - Math.floor(x) - 0.5) * 0.72
    }
  
    let {
      class: className,
      data,
      valueField = 'value',
      groupField = 'group',
      height = 300,
      option = undefined,
      ariaLabel = undefined,
      children,
      ref = $bindable(null),
      ...restProps
    }: BeeswarmChartProps = $props()
  
    // Destructured (not rendered): the chart renders from `data`, not a slot —
    // this keeps a stray `children` prop out of the wrapper's spread attributes.
    void children
  
    let chartHost = $state<HTMLDivElement | null>(null)
    let chart: EChartsType | null = null
  
    const mergedOption = $derived.by(() => {
      const groups = [...new Set(data.map((d) => String(d[groupField])))]
      const series = groups.map((g, gi) => ({
        name: g,
        type: 'scatter',
        symbolSize: 9,
        itemStyle: { color: chartTheme.colors[gi % chartTheme.colors.length], opacity: 0.8 },
        data: data
          .map((d, i) => ({ d, i }))
          .filter(({ d }) => String(d[groupField]) === g)
          .map(({ d, i }) => [d[valueField], gi + jitter(i, gi)]),
      }))
      const userOption: any = option ?? {}
      const {
        series: userSeries,
        xAxis: userXAxis,
        yAxis: userYAxis,
        grid: userGrid,
        tooltip: userTooltip,
        legend: userLegend,
        ...userRest
      } = userOption
      const mergedSeries = Array.isArray(userSeries) ? series.map((s, i) => ({ ...s, ...(userSeries[i] ?? {}) })) : series
      return {
        color: chartTheme.colors,
        grid: mergeOptionBlock(
          { left: 16, right: 16, top: 24, bottom: groups.length > 1 ? 32 : 24, containLabel: true },
          userGrid,
        ),
        tooltip: mergeOptionBlock(
          {
            trigger: 'item',
            backgroundColor: chartTheme.tooltipBg,
            borderColor: chartTheme.tooltipBorder,
            textStyle: { color: chartTheme.tooltipText, fontSize: 12 },
          },
          userTooltip,
        ),
        legend:
          groups.length > 1
            ? mergeOptionBlock(
                {
                  bottom: 0,
                  icon: 'circle',
                  itemWidth: 8,
                  itemHeight: 8,
                  textStyle: { fontSize: 11, color: chartTheme.textColor },
                },
                userLegend,
              )
            : undefined,
        xAxis: mergeOptionBlock(
          {
            type: 'value',
            scale: true,
            splitLine: { lineStyle: { color: chartTheme.splitLineColor } },
            axisLabel: { color: chartTheme.textColor, fontSize: 11 },
            axisLine: { lineStyle: { color: chartTheme.axisColor } },
          },
          userXAxis,
        ),
        yAxis: mergeOptionBlock(
          {
            type: 'value',
            min: -0.6,
            max: groups.length - 0.4,
            interval: 1,
            axisLabel: { color: chartTheme.textColor, fontSize: 11, formatter: (v: number) => groups[Math.round(v)] ?? '' },
            splitLine: { show: false },
          },
          userYAxis,
        ),
        series: mergedSeries,
        ...userRest,
      }
    })
  
    // Lifecycle owns init/resize/dispose; option pushes ride a separate effect
    // so re-renders merge into the live chart (no re-init, transitions kept).
    $effect(() => {
      const host = chartHost
      if (!host) return
      chart ??= init(host)
      const ro = new ResizeObserver(() => chart?.resize())
      ro.observe(host)
      return () => {
        ro.disconnect()
        chart?.dispose()
        chart = null
      }
    })
  
    $effect(() => {
      if (!chartHost) return
      chart?.setOption(mergedOption)
    })
  
    const heightStyle = $derived(`height: ${/^\d+$/.test(String(height)) ? `${height}px` : String(height)}`)
  </script>
  
  <div
    bind:this={ref}
    role="img"
    tabindex="0"
    aria-label={ariaLabel || 'Chart'}
    style={heightStyle}
    class={cn('focus-visible:ring-ring w-full focus-visible:ring-2 focus-visible:outline-none', className)}
    {...restProps}
  >
    <div bind:this={chartHost} class="size-full"></div>
  </div>
  

• src/lib/components/ui/beeswarm-chart/chart-theme.svelte.ts8.1 kB

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• src/lib/components/ui/beeswarm-chart/index.ts0.1 kB

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

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