Lollipop 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/lollipop-chart/LollipopChart.svelte4 kB

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  <script lang="ts" module>
    import type { HTMLAttributes } from 'svelte/elements'
  
    export interface LollipopChartProps extends HTMLAttributes<HTMLDivElement> {
      data: { category: string; value: number }[]
      height?: number | string
      option?: any
      /** Accessible name announced for the chart image. Defaults to "Chart". */
      ariaLabel?: string
      ref?: HTMLDivElement | null
    }
  </script>
  
  <script lang="ts">
    import { use, init, type ECharts } from 'echarts/core'
    import { CanvasRenderer } from 'echarts/renderers'
    import { BarChart as EChartsBarChart, ScatterChart as EChartsScatterChart } from 'echarts/charts'
    import { GridComponent, TooltipComponent, LegendComponent } from 'echarts/components'
    import { cn } from '$lib/utils'
    import { useChartTheme, mergeOptionBlock } from './useChartTheme.svelte'
  
    use([CanvasRenderer, EChartsBarChart, EChartsScatterChart, GridComponent, TooltipComponent, LegendComponent])
  
    let {
      data,
      height = 300,
      option,
      ariaLabel,
      class: className,
      ref = $bindable(null),
      ...restProps
    }: LollipopChartProps = $props()
  
    const mergedOption: any = $derived.by(() => {
      const theme = useChartTheme()
      const cats = data.map((d) => d.category)
      const vals = data.map((d) => d.value)
      const series = [
        {
          name: 'stem',
          type: 'bar',
          barWidth: 3,
          silent: true,
          itemStyle: { color: theme.axisColor },
          data: vals,
        },
        {
          name: 'value',
          type: 'scatter',
          symbolSize: 14,
          itemStyle: { color: theme.colors[0] },
          label: { show: true, position: 'top', color: theme.textColor, fontSize: 11 },
          data: vals.map((v, i) => [cats[i], v]),
        },
      ]
      const userOption: any = option ?? {}
      const {
        series: userSeries,
        xAxis: userXAxis,
        yAxis: userYAxis,
        grid: userGrid,
        tooltip: userTooltip,
        ...userRest
      } = userOption
      const mergedSeries = Array.isArray(userSeries)
        ? series.map((s, i) => ({ ...s, ...(userSeries[i] ?? {}) }))
        : series
      return {
        color: theme.colors,
        grid: mergeOptionBlock({ left: 16, right: 16, top: 32, bottom: 24, containLabel: true }, userGrid),
        tooltip: mergeOptionBlock(
          {
            trigger: 'axis',
            axisPointer: { type: 'shadow' },
            backgroundColor: theme.tooltipBg,
            borderColor: theme.tooltipBorder,
            textStyle: { color: theme.tooltipText, fontSize: 12 },
          },
          userTooltip,
        ),
        legend: { show: false },
        xAxis: mergeOptionBlock(
          {
            type: 'category',
            data: cats,
            axisLine: { lineStyle: { color: theme.axisColor } },
            axisLabel: { color: theme.textColor, fontSize: 11 },
            axisTick: { show: false },
          },
          userXAxis,
        ),
        yAxis: mergeOptionBlock(
          {
            type: 'value',
            splitLine: { lineStyle: { color: theme.splitLineColor } },
            axisLabel: { color: theme.textColor, fontSize: 11 },
          },
          userYAxis,
        ),
        series: mergedSeries,
        ...userRest,
      }
    })
  
    let chartEl = $state<HTMLDivElement | null>(null)
    let chart: ECharts | null = null
  
    $effect(() => {
      const el = chartEl
      if (!el) return
      chart = init(el)
      const ro = new ResizeObserver(() => chart?.resize())
      ro.observe(el)
      return () => {
        ro.disconnect()
        chart?.dispose()
        chart = null
      }
    })
  
    $effect(() => {
      chart?.setOption(mergedOption, { notMerge: true, lazyUpdate: true })
    })
  </script>
  
  <!-- Focusable chart image mirrors the Vue/React twins for keyboard users. -->
  <!-- svelte-ignore a11y_no_noninteractive_tabindex -->
  <div
    bind:this={ref}
    data-uipkge=""
    data-slot="lollipop-chart"
    role="img"
    tabindex="0"
    aria-label={ariaLabel || 'Chart'}
    style:height={/^\d+$/.test(String(height)) ? `${height}px` : String(height)}
    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/lollipop-chart/index.ts0.2 kB

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• src/lib/components/ui/lollipop-chart/useChartTheme.svelte.ts8.1 kB

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

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