JSFiddle - React, Tailwind, and code Playground

HTML

<link rel="stylesheet" href="https://s3.amazonaws.com/flexmonster/2.3/demo.css">
<script src="https://cdn.flexmonster.com/flexmonster.js"></script>

<h3>
  Try exporting to Excel using the "Export" tab
</h3>
<div id="pivot-container"></div>

JavaScript

var pivot = new Flexmonster({
  container: "#pivot-container",
  componentFolder: "https://cdn.flexmonster.com/",
  toolbar: true,
  beforetoolbarcreated: customizeToolbar,
  report: {
    "dataSource": {
      "type": "csv",
      "filename": "https://cdn.flexmonster.com/data/data.csv"
    },
    "slice": {
      "reportFilters": [{
          "uniqueName": "Business Type",
          "filter": {
            "members": [
              "business type.[specialty bike shop]"
            ]
          }
        }
      ],
      "rows": [{
        "uniqueName": "Color"
      }],
      "columns": [{
        "uniqueName": "Category",
        "filter": {
            "members": [
              "Category.[Bikes]"
            ]
          }
      }],
      "measures": [{
        "uniqueName": "Price",
        "aggregation": "sum"
      }]
    }
  }
});

function customizeToolbar(toolbar) {
  var tabs = toolbar.getTabs();
  toolbar.getTabs = function() {
    let exportTab = tabs.find(tab => tab.id == "fm-tab-export");
    if (!exportTab) return tabs;
    let exportToExcelTab = exportTab.menu.find(tab => tab.id == "fm-tab-export-excel");
    exportToExcelTab.handler = () => {
      pivot.exportTo("excel", {
        showFilters: true
      });
    }
    return tabs;
  }
}