Ensure page doesn't scroll down when pressing Escape to close the Dialog component (#3218)

* ensure we blur the `document.activeElement` when pressing `Escape`

* update changelog

Author: RobinMalfait

packages/@headlessui-react/CHANGELOG.md

@@ -10,6 +10,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 ### Fixed
 
 - [internal] Don’t set a focus fallback for Dialog’s in demo mode ([#3194](https://github.com/tailwindlabs/headlessui/pull/3194))
+- Ensure page doesn't scroll down when pressing `Escape` to close the `Dialog` component ([#3218](https://github.com/tailwindlabs/headlessui/pull/3218))
 
 ## [2.0.3] - 2024-05-07
 

packages/@headlessui-react/src/components/dialog/dialog.tsx

@@ -310,6 +310,21 @@ function DialogFn<TTag extends ElementType = typeof DEFAULT_DIALOG_TAG>(
     if (event.key !== Keys.Escape) return
     event.preventDefault()
     event.stopPropagation()
+
+    // Ensure that we blur the current activeElement to prevent maintaining
+    // focus and potentially scrolling the page to the end (because the Dialog
+    // is rendered in a Portal at the end of the document.body and the browser
+    // tries to keep the focused element in view)
+    //
+    // Typically only happens in Safari.
+    if (
+      document.activeElement &&
+      'blur' in document.activeElement &&
+      typeof document.activeElement.blur === 'function'
+    ) {
+      document.activeElement.blur()
+    }
+
     close()
   })