demo D194

Variation along an ordering in htmx

Volatility, growth and drawdown, from rows loaded out of order

grid.statistics.series(col, { by })

This grid computes volatility, growth and drawdown along an ordering, even from rows loaded out of order. It reads a series' behaviour over its own sequence, so trend and swings surface without the data arriving pre-sorted.

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@1.108.0/lattice-grid.min.css">

<!-- 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="variation-over-time-table" data-lattice-grid>
  <thead>
    <tr>
      <th data-field="date">Date</th>
      <th data-field="price">Price</th>
    </tr>
  </thead>
  <tbody>
    <tr data-id="36"><td>2026-02-06</td><td>98.25</td></tr>
    <tr data-id="72"><td>2026-03-14</td><td>99.76</td></tr>
    <tr data-id="108"><td>2026-04-19</td><td>101.87</td></tr>
    <!-- the rest of the rows, rendered by your server -->
  </tbody>
</table>
<pre id="out" style="margin-top: 12px"></pre>

<script type="module">
  import { hydrateTable } from 'https://cdn.latticegrid.dev/lattice-grid@1.108.0/modules/htmx.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('variation-over-time-table'), {
    toolPanel: { side: 'left', panels: ['filters', 'columns'] },
    columns: [
      { field: 'date', title: 'Date', type: 'date', layout: { pin: 'start', width: 150 } },
      { field: 'price', title: 'Price', type: 'number' },
    ],
  });

  const out = document.getElementById('out');
  const report = () => {
    // by is required: reductions see rows as loaded, not in the grid's sort.
    out.textContent = JSON.stringify(
      grid.statistics.series('price', { by: 'date', periodsPerYear: 252 }), null, 2);
  };
  grid.on('filter:changed', report);  // every figure follows the filters
  report();
</script>