Charts with no grid on screen in Svelte

<script>
  import { createHeadlessGrid } from 'https://cdn.latticegrid.dev/lattice-grid@1.107.0/lattice-grid.esm.min.js';
  import { createChart } from 'https://cdn.latticegrid.dev/lattice-grid@1.107.0/modules/charts.esm.min.js';
  import { onMount } from 'svelte';

  let byRegionEl;
  let byStatusEl;
  let distributionEl;

  const config = {
    rowKey: 'id',
    columns: [
      { field: 'circuit', title: 'Circuit', layout: { width: 180 } },
      { field: 'region', title: 'Region', filter: { type: 'set' } },
      { field: 'status', title: 'Status', filter: { type: 'set' } },
      { field: 'bandwidth', title: 'Bandwidth', type: 'number' },
      { field: 'charge', title: 'Monthly charge', type: 'number',
        format: { style: 'currency', currency: 'GBP' }, total: 'sum' },
    ],
    rows,  // an array of circuit records
  };

  // No visible table: createHeadlessGrid is the data engine on its own, and
  // every chart draws from it, with the same follow behaviour.
  onMount(() => {
    const grid = createHeadlessGrid(config);
    createChart({ grid, container: byRegionEl,     type: 'bar',       x: 'region', y: 'charge', title: 'by region' });
    createChart({ grid, container: byStatusEl,     type: 'donut',     x: 'status', y: 'charge', title: 'by status' });
    createChart({ grid, container: distributionEl, type: 'histogram', y: 'charge',              title: 'distribution' });
    return () => grid.destroy();
  });
</script>

<svelte:head>
  <link rel="stylesheet" href="https://cdn.latticegrid.dev/lattice-grid@1.107.0/lattice-grid.min.css">
</svelte:head>

<div style="display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; height: 260px">
  <div bind:this={byRegionEl}></div>
  <div bind:this={byStatusEl}></div>
  <div bind:this={distributionEl}></div>
</div>