Add getSiblings

snippets/getSiblings.md

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+---
+title: getSiblings
+tags: browser,array,intermediate
+---
+
+Returns an array containing all the siblings of the given element.
+
+Use `Node.prototype.parentNode` and `Node.prototype.childNodes` to get a `NodeList` of all the elements contained in the element's parent.
+Use the spread operator (`...`) and `Array.prototype.filter()` to convert to an array and remove the given element from it.
+
+```js
+const getSiblings = el =>
+  [...el.parentNode.childNodes].filter(node => node !== el);
+```
+
+```js
+getSiblings(document.querySelector('head')); // ['body']
+```