NonDocumentTypeChildNode.nextElementSibling

The NonDocumentTypeChildNode.nextElementSibling read-only property returns the element immediately following the specified one in its parent's children list, or null if the specified element is the last one in the list.

var nextNode = elementNodeReference.nextElementSibling; 

<div id="div-01">Here is div-01</div>
<div id="div-02">Here is div-02</div>

<script type="text/javascript">
  var el = document.getElementById('div-01').nextElementSibling;
  console.log('Siblings of div-01:');
  while (el) {
    console.log(el.nodeName);
    el = el.nextElementSibling;
  }
</script>

This example outputs the following into the console when it loads:

Siblings of div-01:
DIV
SCRIPT

This property is unsupported prior to IE9, so the following snippet can be used to add support to IE8:

// Source: https://github.com/Alhadis/Snippets/blob/master/js/polyfills/IE8-child-elements.js
if(!("nextElementSibling" in document.documentElement)){
    Object.defineProperty(Element.prototype, "nextElementSibling", {
        get: function(){
            var e = this.nextSibling;
            while(e && 1 !== e.nodeType)
                e = e.nextSibling;
            return e;
        }
    });
}

// Source: https://github.com/jserz/js_piece/blob/master/DOM/NonDocumentTypeChildNode/nextElementSibling/nextElementSibling.md
(function (arr) {
  arr.forEach(function (item) {
    if (item.hasOwnProperty('nextElementSibling')) {
      return;
    }
    Object.defineProperty(item, 'nextElementSibling', {
      configurable: true,
      enumerable: true,
      get: function () {
        var el = this;
        while (el = el.nextSibling) {
          if (el.nodeType === 1) {
              return el;
          }
        }
        return null;
      },
      set: undefined
    });
  });
})([Element.prototype, CharacterData.prototype]);

• ParentNode.firstElementChild
• ParentNode.lastElementChild
• The ChildNode pure interface.
• Object types implementing this pure interface: CharacterData, Element, and DocumentType.