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javascript/snippets/bottom-visible.md

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+---
+title: Check if bottom of page is visible
+type: snippet
+tags: [browser]
+cover: red-mountain
+dateModified: 2020-10-22T20:23:47+03:00
+---
+
+Checks if the bottom of the page is visible.
+
+- Use `Window.scrollY`, `Element.scrollHeight` and `Element.clientHeight` to determine if the bottom of the page is visible.
+
+```js
+const bottomVisible = () =>
+  document.documentElement.clientHeight + window.scrollY >=
+  (document.documentElement.scrollHeight ||
+    document.documentElement.clientHeight);
+```
+
+```js
+bottomVisible(); // true
+```