JSFiddle - React, Tailwind, and code Playground

HTML

<script src="https://cdn.flexmonster.com/flexmonster.js"></script>
<div id="pivot-container"></div>

JavaScript

var pivot = new Flexmonster({
  container: "#pivot-container",
  componentFolder: "https://cdn.flexmonster.com/",
  report: {
    dataSource: {
      dataSourceType: "json",
      data: getData()
    },
    "slice": {
        "rows": [
            {
                "uniqueName": "Customer"
            }
        ],
        "columns": [
            {
                "uniqueName": "Product"
            },
            {
                "uniqueName": "[Measures]"
            }
        ],
        "measures": [
            {
                "uniqueName": "Curr Vol"
            },
            {
                "uniqueName": "Prev Vol"
            },
            {
                "uniqueName": "Vol Chg"
            }
        ]
    },
    "options": {
        "grid": {
            "showGrandTotals": "rows"
        }
    }
  },
  width: "100%",
  height: 500,
  toolbar: true
});

function getData() {
  return [{
    "Customer": "A",
    "Product": "P1",
    "Curr Vol": 10,
    "Prev Vol": 40,
    "Vol Chg": -0.75
  }, {
    "Customer": "A",
    "Product": "P2",
    "Curr Vol": 20,
    "Prev Vol": 30,
    "Vol Chg": -0.33333333
  }, {
    "Customer": "B",
    "Product": "P1",
    "Curr Vol": 30,
    "Prev Vol": 20,
    "Vol Chg": 0.5
  }, {
    "Customer": "B",
    "Product": "P2",
    "Curr Vol": 40,
    "Prev Vol": 10,
    "Vol Chg": 3
  }];
};