Edit in JSFiddle

document.addEventListener("DOMContentLoaded", function() {
  new FancyGrid({
    title: 'Load JSON file',
    renderTo: 'container',
    width: 500,
    height: 400,
    theme: 'blue',
    data: {
      proxy: {
        url: 'https://fancygrid.com/ajax/users.json'
      }
    },
    defaults: {
      type: 'string',
      width: 100,
      resizable: true,
      sortable: true
    },
    columns: [{
      index: 'company',
      width: 105,
      locked: true,
      title: 'Company'
    }, {
      index: 'name',
      title: 'Name'
    }, {
      index: 'surname',
      title: 'Sur Name'
    }, {
      index: 'age',
      width: 60,
      title: 'Age',
      type: 'number'
    }]
  });
});

<script src="https://cdn.fancygrid.com/fancy.min.js"></script>

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