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javascript/snippets/find-closest-anchor.md

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+---
+title: Find closest anchor
+type: snippet
+tags: [browser]
+author: chalarangelo
+cover: colorful-lounge
+dateModified: 2021-04-22T08:45:39+03:00
+---
+
+Finds the anchor node closest to the given `node`, if any.
+
+- Use a `for` loop and `Node.parentNode` to traverse the node tree upwards from the given `node`.
+- Use `Node.nodeName` and `String.prototype.toLowerCase()` to check if any given node is an anchor (`'a'`).
+- If no matching node is found, return `null`.
+
+```js
+const findClosestAnchor = node => {
+  for (let n = node; n.parentNode; n = n.parentNode)
+    if (n.nodeName.toLowerCase() === 'a') return n;
+  return null;
+};
+```
+
+```js
+findClosestAnchor(document.querySelector('a > span')); // a
+```