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

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Line + area

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A simple line and area chart.

This is the server-side rendered version. ssr and percentRange on <LayerCake> put the scales in percentages, so the chart renders before the browser measures it. The axes are HTML components and the marks sit in a <ScaledSvg> that stretches to fit its box.

  • +page.svelte
  • ./_components/Line.svelte
  • ./_components/Area.svelte
  • ./_components/AxisX.percent-range.html.svelte
  • ./_components/AxisY.percent-range.html.svelte
  • ./_data/points.csv
<script>
  import { LayerCake, ScaledSvg, Html } from 'layercake';

  import Line from './_components/Line.svelte';
  import Area from './_components/Area.svelte';
  import AxisX from './_components/AxisX.percent-range.html.svelte';
  import AxisY from './_components/AxisY.percent-range.html.svelte';

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

  const xKey = 'myX';
  const yKey = 'myY';
</script>

<div class="chart-container">
  <LayerCake
    ssr
    percentRange
    padding={{ top: 8, right: 10, bottom: 20, left: 25 }}
    x={xKey}
    y={yKey}
    yDomain={[0, null]}
    {data}
  >
    <Html>
      <AxisX />
      <AxisY ticks={4} />
    </Html>
    <ScaledSvg>
      <Line />
      <Area />
    </ScaledSvg>
  </LayerCake>
</div>

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