JSFiddle - React, Tailwind, and code Playground

HTML

<script src="https://cdn.flexmonster.com/flexmonster.js"></script>

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

JavaScript

var jsonData = [
  {billDate: {type: "date string"}, "type": {"type": "number", "aggregations": ["average"]}},
  {billDate:"2020-02-05", "type": 1},
  {billDate:"2019-10-15", "type": 2},
  {billDate:"2015-12-22", "type": 2},
  {billDate:"2019-11-09", "type": 1}
  ];

var pivot = new Flexmonster({
	container: "pivot-container",
  componentFolder: "https://cdn.flexmonster.com/",
		toolbar: true,
		report: {
    dataSource: {
    	data: jsonData,
      dataSourceType: "json"
    },
    slice: {
      reportFilters: [],
      rows: [{uniqueName:"billDate"}],
      columns: [
        {
          uniqueName: "[Measures]"
        }
      ],
      measures: [{uniqueName:"type"}]
    },
    options: {
      grid: {
       type: 'flat'
      }
    }
  }
	});