Find deepest element

findDeepest.js

function findDeepest (elem) {
 var result = {maxDepth: 0, deepestElem: null}
 descend(elem, 0, result);
 if (result.maxDepth > 0)
  console.log(result);
 }


function descend(elem, depth, result) {    
 switch (elem.nodeType) {
    case 1: // ELEMENT_NODE
        if (depth > result.maxDepth) {
         result.maxDepth = depth;
         result.deepestElem = elem;
         }
        for (var i=0; i<elem.childNodes.length; i++)
           descend(elem.childNodes[i], depth + 1, result);
        break;
    case 3: // TEXT_NODE
    case 4: // CDATA_SECTION_NODE
    case 5: // ENTITY_REFERENCE_NODE
    case 8: // COMMENT_NODE
        // handle these cases as needed
    break;
    }
}