Here is an example of using the Chart Open in a plain html page:
<html>
    <head>
        <link href="https://developer.temenos.com/uux/base.css" rel="stylesheet" />
        <script src="https://developer.temenos.com/uux/unified-ux-web.min.js"></script>
    </head>
    <body>
      <uwc-chart-open></uwc-chart-open>
      <script>
        document.addEventListener("DOMContentLoaded", () => {
          document.querySelector("uwc-chart-open").config = {
            xAxis: { type: "category", data: ["Mon", "Tue", "Wed", "Thu", "Fri"] },
            yAxis: { type: "value" },
            series: [{ type: "bar", data: [12, 19, 8, 15, 10] }],
          };
        });
      </script>
    </body>
</html>