Find all decendent text and element nodes that don't have any children

childless.js

// Find all decendent text and element nodes that don't have any children
function findChildless(currentNode) {
  var nodes = [];

  // Recursion
  // If currentNode has children
  if (currentNode.hasChildNodes()) {
    // Run `findChildless` on all children
    for (var i=0; i < currentNode.childNodes.length; i++) {
      var results = findChildless(currentNode.childNodes[i]);
      // If there are results, concat the results with `nodes` Array 
      if (results) {
        nodes = nodes.concat(results);
      }
    }
  } else { // No children
    if (currentNode.nodeType === 1 || currentNode.nodeType === 3) {
      // Push `currentNode` onto `nodes` Array if it is a text or element node type
      nodes.push(currentNode);
    }
  }

  // Return nodes list
  return nodes;
}