Search for all parents of elements in JavaScript

closest

Задание 1

Given an element:

html<header>
  <div>
    <p>
      <span id="elem"></span>
    </p>
  </div>
</header>

Find the closest parent of this element, which is the div tag.

Задание 2

Given an element:

html<header>
  <div class="www">
    <p class="www">
      <span id="elem"></span>
    </p>
  </div>
</header>

Find the closest parent of this element, which is an element with the class www.