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javascript/snippets/get-vertical-offset.md

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+---
+title: Vertical offset of element
+type: snippet
+tags: [browser]
+author: chalarangelo
+cover: waves-from-above-2
+dateModified: 2021-01-05T22:41:09+02:00
+---
+
+Finds the distance from a given element to the top of the document.
+
+- Use a `while` loop and `HTMLElement.offsetParent` to move up the offset parents of the given element.
+- Add `HTMLElement.offsetTop` for each element and return the result.
+
+```js
+const getVerticalOffset = el => {
+  let offset = el.offsetTop,
+    _el = el;
+  while (_el.offsetParent) {
+    _el = _el.offsetParent;
+    offset += _el.offsetTop;
+  }
+  return offset;
+};
+```
+
+```js
+getVerticalOffset('.my-element'); // 120
+```