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Documentation for Layer Cake v10, before Svelte 5 runes. Current docs at layercake.graphics

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Since we want an ordinal y-axis and Layer Cake defaults to a linear scale, pass in a custom scale to yScale with a few formatting options. Set the x-scale to always start at 0 so you don't show misleading differences between groups.

  • +page.svelte
  • ./_components/Bar.svelte
  • ./_components/AxisX.svelte
  • ./_components/AxisY.svelte
  • ./_data/groups.csv
<script>
  import { LayerCake, Svg } from 'layercake';
  import { scaleBand } from 'd3-scale';

  import Bar from './_components/Bar.svelte';
  import AxisX from './_components/AxisX.svelte';
  import AxisY from './_components/AxisY.svelte';

  // The CSV rows are parsed, and their numbers typed, by @rollup/plugin-dsv. See vite.config.js
  import data from './_data/groups.csv';

  const xKey = 'value';
  const yKey = 'year';
</script>

<div class="chart-container">
  <LayerCake
    padding={{ bottom: 20, left: 35 }}
    x={xKey}
    y={yKey}
    yScale={scaleBand().paddingInner(0.05)}
    xDomain={[0, null]}
    {data}
  >
    <Svg>
      <AxisX tickMarks showBaseline snapLabels />
      <AxisY tickMarks gridlines={false} />
      <Bar />
    </Svg>
  </LayerCake>
</div>

<style>
  /* Give the wrapper a width and height. LayerCake fills it. */
  .chart-container {
    width: 100%;
    height: 250px;
  }
</style>