is-descendant/index.js

Checks if an element is descendant of another

'use strict';

module.exports = isDescendant;

function isDescendant(parent, child) {
  var node = child.parentNode;

  while (node !== null) {
    if (node === parent) {
      return true;
    }

    node = node.parentNode;
  }

  return false;
}