30-seconds-of-code/snippets/getAncestors.md

title, tags, firstSeen, lastUpdated

title	tags	firstSeen	lastUpdated
getAncestors	browser,beginner	2020-10-15T09:28:34+03:00	2021-01-05T22:45:34+02:00

Returns all the ancestors of an element from the document root to the given element.

• Use Node.parentNode and a while loop to move up the ancestor tree of the element.
• Use Array.prototype.unshift() to add each new ancestor to the start of the array.

const getAncestors = el => {
  let ancestors = [];
  while (el) {
    ancestors.unshift(el);
    el = el.parentNode;
  }
  return ancestors;
};

getAncestors(document.querySelector('nav')); 
// [document, html, body, header, nav]