26 lines
565 B
Markdown
26 lines
565 B
Markdown
---
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title: getAncestors
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tags: browser,beginner
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---
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Returns all the ancestors of an element from the document root to the given element.
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- Use a `Node.parentNode` and a `while` loop to move up the ancestor tree of the element.
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- Use `Array.prototype.unshift()` to add each new ancestor to the start of the array.
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```js
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const getAncestors = el => {
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let ancestors = [];
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while (el) {
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ancestors.unshift(el);
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el = el.parentNode;
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}
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return ancestors;
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};
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```
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```js
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getAncestors(document.querySelector('nav'));
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// [document, html, body, header, nav]
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```
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