You can import charts from Excel files or create them on demand directly on a Keikai spreadsheet. Charts will be updated in real-time when the source data is updated. Visit Keikai Developer Reference to see all supported chart types.

<?xml version="1.0" encoding="UTF-8"?>
<zk xmlns="http://www.zkoss.org/2005/zul"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://www.zkoss.org/2005/zul http://keikai.io/2019/zul/zul.xsd">
    <spreadsheet id="spreadsheet" width="100%" src="/WEB-INF/books/charts.xlsx" maxVisibleRows="40"
                 maxVisibleColumns="20" vflex="1" showSheetbar="true"/>
</zk>