Iframe scrolling parent window

gistfile1.txt

// IFRAME
(function () {
  const scrollParentWindow = (x = 0, y = 0) => {
      const parentWin = window.parent,
          parentExpectedUrl = 'PARENT_URL_HERE',
          currentParentUrl = `http://${parentWin.location.hostname}`

      if (parentExpectedUrl === currentParentUrl) {
          parentWin.postMessage({
          xAxis: x,
          yAxis: y
          }, parentExpectedUrl)
      }

      return false
  }
}());