Handsontable example

HTML

<div id="example1" class="hot handsontable htRowHeaders htColumnHeaders"></div>

CSS

</style><script src="https://cdn.jsdelivr.net/npm/[email protected]/dist/handsontable.full.min.js"></script><link type="text/css" rel="stylesheet" href="https://cdn.jsdelivr.net/npm/[email protected]/dist/handsontable.full.min.css">

JavaScript

var example1 = document.getElementById('example1');
  var hot = new Handsontable(example1, {
    data: [
      [2],
      [2],
      [2],
      [2],
      [2],
      [2]
    ],
    colHeaders: true,
    rowHeaders: true,
    trimRows: [1, 2, 3, 4, 5]
  });

  function countIt() {
    var arr = hot.getSourceDataAtCol(0)
    var sum = arr.reduce(add, 0);

    function add(a, b) {
      return a + b;
    }

    console.log(sum);
  }

  countIt()