<bmx-pivot-chart>
A chart of a bmx-pivot-grid's totals that follows the pivot.
The chart follows the pivot. Close a quarter's year, filter a region or drag another field into
Columns with the field list, and the chart redraws. Click the legend to hide a series; focus the chart and use the
arrow keys to hear each value.
Every property, event and method: https://docs.binarymission.co.uk/webcomponents/bmx/bmx-pivot-chart.html