Add getParentsUntil

snippets/getParentsUntil.md

@@ -0,0 +1,28 @@
+---
+title: getParentsUntil
+tags: browse,intermediate
+---
+
+Finds all the ancestors of an element up until the element matched by the specified selector.
+
+- 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.
+- Use `Element.matches()` to check if the current element matches the specified `selector`.
+
+```js
+const getParentsUntil = (el, selector) => {
+  let parents = [],
+    _el = el.parentNode;
+  while (_el && typeof _el.matches === 'function') {
+    parents.unshift(_el);
+    if (_el.matches(selector)) return parents;
+    else _el = _el.parentNode;
+  }
+  return [];
+};
+```
+
+```js
+getParentsUntil(document.querySelector('#home-link'), 'header');
+// [header, nav, ul, li]
+```