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              <div class="container">
<div id="demo">
  <div contenteditable="">Way to detect overflow event support and use it with graceful degradation.<br/>Works on Chrome, Safari and Firefox.<br/>Now insert some text here to make it `overflow`.<br></div>
<div id="status"></div>
<a href="https://github.com/zmmbreeze/useOverflowEvent" target="_top"><img style="position: absolute; top: 0; right: 0; border: 0;" src="https://s3.amazonaws.com/github/ribbons/forkme_right_darkblue_121621.png" alt="Fork me on GitHub"></a>
              body {
  margin: 0;
.container {
  width: 640px;
  margin: 0 auto;
#demo {
    margin: 2em 0 0;
    padding: 0.5em;
    height: 80px;
    overflow: auto;
    line-height: 1.5;
    border: 2px solid #CCD1D9;
    border-bottom-width: 1px;
#demo div {
    outline: none;
#status {
    margin-bottom: 2em;
    padding: 5px 1em;
    color: #967ADC;
    border: 2px solid #CCD1D9;
    border-top: none;
    background: #EAEAEA;
              useOverflowEvent(function (addOverflowListener) {
  var status = document.getElementById('status');
  status.innerHTML = 'Overflow event ' + (addOverflowListener ? 'supported' : 'not supported');
  if (!addOverflowListener) {
    // browser not support

  var container = document.getElementById('demo');
  addOverflowListener(container, 'over', function () {
    status.innerHTML = 'overflow';
  addOverflowListener(container, 'under', function () {
    status.innerHTML = 'underflow';
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