A recursive DOM traversal method for finding a specific node.

findNode.js

function traverse(node, current) {
  if(node.isEqualNode(current)){
    return current;
  } else {
    let el = null;
    for(let i = 0; !el && i < current.children.length; i++){
      el = traverse(node, current.children[i]);
    }
    return el;
  }
}