DOM Helper Methods

domHelper.js

/* Collection of DOM Helper Methods
 * Livingston Samuel
 */

var DOM = {};

/* Get Next Element node Sibling - Equivalent of nextElementSibling */
DOM.next = function (elem) {
  var sibling = elem.nextSibling;

  while(sibling && sibling.nodeType !== 1) { //Loop as long as the nextSibling is not an Element node
    sibling = sibling.nextSibling;
  }

  return sibling; //Returns null if there is no Element node sibling, else returns reference to the next Element node Sibling
};
//The above method is approx. 100 times faster than jQuery(elem).next()

/* Get All the Next Element node Siblings */
DOM.nextAll = function (elem, allNodes) {
  var sibling = elem.nextSibling,
      result = [];

  if (allNodes) {
    while (sibling) {
      result.push(sibling);
      sibling = sibling.nextSibling;
    }
  } else {
    while (sibling) {
      if (sibling.nodeType === 1) {
        result.push(sibling);
      }
      sibling = sibling.nextSibling;
    }
  }

  return result;
};

/* Get Previous Element node Sibling - Equivalent of previousElementSibling */
DOM.prev = function (elem) {
  var sibling = elem.previousSibling;

  while(sibling && sibling.nodeType !== 1) { //Loop as long as the previousSibling is not an Element node
    sibling = sibling.previousSibling;
  }

  return sibling; //Returns null if there is no Element node sibling, else returns reference to the previous Element node Sibling
};

/* Get All the Previous Element node Siblings */
DOM.prevAll = function (elem, allNodes) {
  var sibling = elem.previousSibling,
      result = [];

  if (allNodes) {
    while (sibling) {
      result.push(sibling);
      sibling = sibling.previousSibling;
    }
  } else {
    while (sibling) {
      if (sibling.nodeType === 1) {
        result.push(sibling);
      }
      sibling = sibling.previousSibling;
    }
  }

  return result;
};