Stacked Area Chart

Installation

Examples

Props

Used by

Files installed (3)

• src/lib/components/ui/charts/stacked-area-chart/StackedAreaChart.svelte5.1 kB

  Copy

  <script lang="ts" module>
    import type { HTMLAttributes } from 'svelte/elements'
  
    export interface StackedAreaChartProps extends HTMLAttributes<HTMLDivElement> {
      data: Record<string, any>[]
      xField?: string
      yFields: string[]
      /** Render as 100% shares instead of absolute values. Default false. */
      percent?: boolean
      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 { LineChart as EChartsLineChart } from 'echarts/charts'
    import { GridComponent, LegendComponent, TooltipComponent } from 'echarts/components'
    import { init, use, type ECharts } from 'echarts/core'
    import { CanvasRenderer } from 'echarts/renderers'
    import { cn } from '$lib/utils'
    import {
      chartAxisColor,
      chartColors,
      chartSplitLineColor,
      chartTextColor,
      chartTooltipBg,
      chartTooltipBorder,
      chartTooltipText,
      mergeOptionBlock,
      toRgba,
    } from './useChartTheme'
  
    use([CanvasRenderer, EChartsLineChart, GridComponent, TooltipComponent, LegendComponent])
  
    let {
      class: className,
      data,
      xField = 'x',
      yFields,
      percent = false,
      height = 320,
      option,
      ariaLabel,
      children,
      ref = $bindable(null),
      ...restProps
    }: StackedAreaChartProps = $props()
  
    const mergedOption = $derived.by(() => {
      const totals = data.map((d) => yFields.reduce((s, f) => s + (d[f] ?? 0), 0) || 1)
      const series = yFields.map((f, i) => {
        const c = $chartColors[i % $chartColors.length]
        return {
          name: f,
          type: 'line',
          stack: 'area',
          smooth: true,
          symbol: 'none',
          lineStyle: { width: 1.5, color: c },
          areaStyle: { color: toRgba(c, 0.45) },
          emphasis: { focus: 'series' },
          data: data.map((d, r) => (percent ? ((d[f] ?? 0) / totals[r]!) * 100 : d[f])),
        }
      })
      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: $chartColors,
        grid: mergeOptionBlock({ left: 16, right: 16, top: 24, bottom: 32, containLabel: true }, userGrid),
        tooltip: mergeOptionBlock(
          {
            trigger: 'axis',
            backgroundColor: $chartTooltipBg,
            borderColor: $chartTooltipBorder,
            textStyle: { color: $chartTooltipText, fontSize: 12 },
            valueFormatter: (v: any) => (percent ? `${(+v).toFixed(1)}%` : v),
          },
          userTooltip,
        ),
        legend: mergeOptionBlock(
          {
            bottom: 0,
            icon: 'circle',
            itemWidth: 8,
            itemHeight: 8,
            textStyle: { fontSize: 11, color: $chartTextColor },
          },
          userLegend,
        ),
        xAxis: mergeOptionBlock(
          {
            type: 'category',
            boundaryGap: false,
            data: data.map((d) => d[xField]),
            axisLine: { lineStyle: { color: $chartAxisColor } },
            axisLabel: { color: $chartTextColor, fontSize: 11 },
            axisTick: { show: false },
          },
          userXAxis,
        ),
        yAxis: mergeOptionBlock(
          percent
            ? {
                type: 'value',
                max: 100,
                splitLine: { lineStyle: { color: $chartSplitLineColor } },
                axisLabel: { color: $chartTextColor, fontSize: 11, formatter: '{value}%' },
              }
            : {
                type: 'value',
                splitLine: { lineStyle: { color: $chartSplitLineColor } },
                axisLabel: { color: $chartTextColor, fontSize: 11 },
              },
          userYAxis,
        ),
        series: mergedSeries,
        ...userRest,
      }
    })
  
    let container = $state<HTMLDivElement | null>(null)
    let chart = $state<ECharts | null>(null)
    let rootEl = $state<HTMLDivElement | null>(null)
  
    $effect(() => {
      ref = rootEl
    })
  
    $effect(() => {
      const el = container
      if (!el) return
      const instance = init(el)
      chart = instance
      const ro = new ResizeObserver(() => instance.resize())
      ro.observe(el)
      return () => {
        ro.disconnect()
        instance.dispose()
        if (chart === instance) chart = null
      }
    })
  
    $effect(() => {
      chart?.setOption(mergedOption, { notMerge: true })
    })
  
    const heightStyle = $derived(/^\d+$/.test(String(height)) ? `${height}px` : String(height))
  </script>
  
  <!-- Focusable chart region with an accessible name (mirrors the Vue twin). -->
  <!-- svelte-ignore a11y_no_noninteractive_tabindex -->
  <div
    bind:this={rootEl}
    role="img"
    tabindex="0"
    aria-label={ariaLabel || 'Chart'}
    style="height: {heightStyle}"
    data-uipkge=""
    data-slot="stacked-area-chart"
    class={cn('focus-visible:ring-ring w-full focus-visible:ring-2 focus-visible:outline-none', className)}
    {...restProps}
  >
    <div bind:this={container} class="size-full"></div>
    {@render children?.()}
  </div>
  

• src/lib/components/ui/charts/stacked-area-chart/index.ts0.1 kB

  Copy
• src/lib/components/ui/charts/stacked-area-chart/useChartTheme.ts7.9 kB

  Copy

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

Related components