View source for algorithm-nearest-in-parent

This algorithm will return all the elements in a DOM that meet the <code>condition_test</code> by checking each node in the parent hierarchy above the <code>start_element</code> on up. Once a result is found at any level of the parent hierarchy, we stop checking.

<pre><nowiki>
def nearest_in_parent(start_element, condition_test):
  p = start_element.parent
  while p:
    for c in p.children:
      if condition_test(c):
        return c
    p = p.parent
  return None
</nowiki></pre>