demo D215

Gantt in htmx

A row label with a start and an end, coloured by phase

type: 'gantt', label, start, end

This draws a Gantt-style chart from a row label with a start and an end, coloured by phase. It lays activities out along a timeline so overlaps and sequence read at a glance, from ordinary rows with two dates.

Building…

Loading a live grid…

This is the htmx version. A server-rendered table is upgraded in place, so the page is readable before any script runs and gains the full grid when the module loads, which suits a progressively enhanced app.

The configuration

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

<div id="chart" style="height: 320px"></div>
<!-- A real, server-rendered table: readable with JavaScript off. data-field on
     each header names the column that cell becomes, and data-id on each row is
     the key the grid carries it under. -->
<table id="chart-types-gantt-table" data-lattice-grid>
  <thead>
    <tr>
      <th data-field="task">Task</th>
      <th data-field="phase">Phase</th>
      <th data-field="start">Start</th>
      <th data-field="end">End</th>
    </tr>
  </thead>
  <tbody>
    <tr data-id="1"><td>Discovery</td><td>Plan</td><td>2026-01-06</td><td>2026-01-14</td></tr>
    <tr data-id="2"><td>Build</td><td>Deliver</td><td>2026-01-15</td><td>2026-02-20</td></tr>
    <tr data-id="3"><td>Handover</td><td>Deliver</td><td>2026-02-23</td><td>2026-02-27</td></tr>
    <!-- the rest of the rows, rendered by your server -->
  </tbody>
</table>

<script type="module">
  import { hydrateTable } from 'https://cdn.latticegrid.dev/lattice-grid@1.107.0/modules/htmx.esm.min.js';
  import { createChart } from 'https://cdn.latticegrid.dev/lattice-grid@1.107.0/modules/charts.esm.min.js';

  // The markup carries the rows; a server-rendered table's column types are
  // declared in the config hydrateTable takes. The grid replaces the table
  // where it stood.
  const grid = hydrateTable(document.getElementById('chart-types-gantt-table'), {
    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' },
    ],
  });

  // 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 });
</script>