Gantt

<link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/@toclocoinc/lattice-grid@1.27.0/lattice-grid.min.css">

<div id="app"></div>

<script type="module">
  import React from 'https://esm.sh/react@18';
  import { createRoot } from 'https://esm.sh/react-dom@18/client';
  import { createGrid } from 'https://cdn.jsdelivr.net/npm/@toclocoinc/lattice-grid@1.27.0/lattice-grid.esm.min.js';
  import createLatticeGrid from 'https://cdn.jsdelivr.net/npm/@toclocoinc/lattice-grid@1.27.0/modules/react.esm.min.js';
  import { createChart } from 'https://cdn.jsdelivr.net/npm/@toclocoinc/lattice-grid@1.27.0/modules/charts.esm.min.js';

  const LatticeGrid = createLatticeGrid({ React, createGrid });

  const columns = [
    { field: 'task',  title: 'Task', layout: { width: 160 } },
    { field: 'phase', title: 'Phase', filter: { type: 'set' } },
    { field: 'start', title: 'Start', type: 'date' },
    { field: 'end',   title: 'End',   type: 'date' },
  ];

  // e.g. [{ id: 1, task: 'Discovery', phase: 'Plan', start: '2026-01-06', end: '2026-01-14' }, ...]
  const rows = [/* one row a task */];

  function App() {
    const gridRef = React.useRef(null);

    React.useEffect(() => {
      const grid = gridRef.current.grid;
      // Gantt reads a row label and a start and end date; series colours the bars.
      createChart({ grid, container: '#chart', type: 'gantt',
        label: 'task', start: 'start', end: 'end', series: 'phase', legend: true,
        title: 'Schedule by phase' });
    }, []);

    return (
      <>
        <div id="chart" style={{ height: '320px' }} />
        <LatticeGrid
          ref={gridRef}
          rowKey="id"
          columns={columns}
          rows={rows}
          style={{ height: '320px', marginTop: '14px' }}
        />
      </>
    );
  }

  createRoot(document.getElementById('app')).render(<App />);
</script>