[Docs] Getting Started Feed Interval

<!DOCTYPE html>
<html>

<head>
  <meta charset="utf-8">
  <title>ZingGrid: Blank Grid</title>
  <script nonce="undefined" src="https://cdn.zinggrid.com/dev/zinggrid-dev.min.js"></script>
  <style>
    body {
      background: #e6e6e6;
    }

    zing-grid[loading] {
      height: 172px;
    }
  </style>
</head>

<body>

  <zing-grid caption="Dynamic Data" layout="row" layout-controls>
  </zing-grid>

  <script>
    ZingGrid.setLicense(['26ccbfec16b8be9ee98c7d57bee6e498']); // function to mimic data changing
    function shuffleData(arr) {
      const newArr = arr.slice()
      for (let i = newArr.length - 1; i > 0; i--) {
        const rand = Math.floor(Math.random() * (i + 1));
        [newArr[i], newArr[rand]] = [newArr[rand], newArr[i]];
      }
      return newArr
    };

    // window:load event for Javascript to run after HTML
    // because this Javascript is injected into the document head
    window.addEventListener('load', () => {
      // Javascript code to execute after DOM content
      const zgRef = document.querySelector('zing-grid');
      let intervalTimeoutId = setInterval(() => {
        fetch('https://cdn.zinggrid.com/datasets/remote-data-recordpath.json')
          .then(res => res.json())
          .then(data => {
            // in this use case our endpoint is not updating so
            // we fake an endpoint update by manipulating the data
            const newData = shuffleData(data.company.employees);
            // update data
            zgRef.setData(newData);
          })
          .catch(err => console.error('--- Error In Fetch Occurred ---', err));
      }, 1000);

    });
  </script>
</body>

</html>

<!DOCTYPE html>
<html>

<head>
  <meta charset="utf-8">
  <title>ZingGrid: Blank Grid</title>
  <script src="https://cdn.zinggrid.com/dev/zinggrid-dev.min.js"></script>
</head>

<body>

  <zing-grid caption="Dynamic Data" layout="row" layout-controls>
  </zing-grid>

</body>

</html>

body {
  background: #e6e6e6;
}

// function to mimic data changing
function shuffleData(arr) {
  const newArr = arr.slice()
  for (let i = newArr.length - 1; i > 0; i--) {
    const rand = Math.floor(Math.random() * (i + 1));
    [newArr[i], newArr[rand]] = [newArr[rand], newArr[i]];
  }
  return newArr
};

// window:load event for Javascript to run after HTML
// because this Javascript is injected into the document head
window.addEventListener('load', () => {
  // Javascript code to execute after DOM content
  const zgRef = document.querySelector('zing-grid');
  let intervalTimeoutId = setInterval(() => {
    fetch('https://cdn.zinggrid.com/datasets/remote-data-recordpath.json')
      .then(res => res.json())
      .then(data => {
        // in this use case our endpoint is not updating so
        // we fake an endpoint update by manipulating the data
        const newData = shuffleData(data.company.employees);
        // update data
        zgRef.setData(newData);
      })
      .catch(err => console.error('--- Error In Fetch Occurred ---', err));
  }, 1000);

});