JSFiddle - React, Tailwind, and code Playground

by Flexmonster Pivot Table

HTML

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

<div id="pivot-container"></div>

CSS

.fm-custom-cell {
  display: flex !important;
  align-items: center !important;
  font-size: 12px !important;
}

.fm-custom-cell .flag-icon {
  width: 21px !important;
  height: 16px !important;
  margin-left: 0 !important;
  margin-right: 2px !important;
}

#fm-pivot-view .fm-grid-layout .fm-custom-cell.fm-expanded .fm-expanded-icon::before, 
#fm-pivot-view .fm-grid-layout .fm-custom-cell.fm-collapsed .fm-collapsed-icon::before {
  top: -2px;
  height: 16px;
}

JavaScript

new Flexmonster({
  container: "#pivot-container",
  componentFolder: "https://cdn.flexmonster.com/",
  height: 550,
  toolbar: true,
  report: {
    dataSource: {
      type: "json",
      filename: "data/retail-data.json",
      mapping: {
        "Order Date": {
          type: "year/quarter/month/day",
        }
      },
    },
    slice: {
      rows: [{
        uniqueName: "Status",
      }, ],
      columns: [{
          levelName: "Order Date.Day",
          uniqueName: "Order Date"
        },
        {
          uniqueName: "[Measures]",
        },
      ],
      measures: [{
        uniqueName: "Price",
        aggregation: "sum",
      }],
    },
  },
  customizeCell: customizeCell,
});

function customizeCell(cell, data) {
  /*
  Check if only one measure is present and the cell is a non-empty column measure label
  */
  if (data.columns.length > 0 && data.hierarchy.levels && !data.measure && data.type === "header" && data.label !== "") {
    let hierarchySplitter = /\.\[|\]\.\[|\]/;
    let captions = data.member.parentMember.split(hierarchySplitter).slice(1).reduce(
      (accumulator, currentValue) => accumulator + currentValue + " ",
      ""
    );
    cell.text += "( "+  captions +")"

  }
}