Marking a baseline

<link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/@toclocoinc/lattice-grid@1.28.0/lattice-grid.min.css">

<script type="module">
  import { defineLatticeGrid } from 'https://cdn.jsdelivr.net/npm/@toclocoinc/lattice-grid@1.28.0/modules/webcomponent.esm.js';
  defineLatticeGrid();
</script>

<button id="mark">Mark all</button>
<lattice-grid row-key="id" style="display: block; height: 440px; margin-top: 8px"></lattice-grid>

<script type="module">
  const el = document.querySelector('lattice-grid');
  el.config = {
    columns: [
      { field: 'symbol', title: 'Symbol', layout: { pin: 'start', width: 120 } },
      { field: 'price', title: 'Price', type: 'number' },
      { id: 'delta', title: 'Change', shadow: { of: 'price', kind: 'delta' }, type: 'number', format: { signed: true } },
      { id: 'first', title: 'Baseline', shadow: { of: 'price', kind: 'firstValue' }, type: 'number' },
    ],
  };
  el.rows = rows;  // trading book records

  // rebase moves every baseline to the current value, so the deltas start again.
  // el.grid is the live grid inside the element.
  document.getElementById('mark').onclick = () => el.grid.statistics.rebase('price');
</script>