diff --git a/files/en-us/web/api/element/mouseleave_event/index.md b/files/en-us/web/api/element/mouseleave_event/index.md
index 00f3341dd8ae799..0315a4b4768d476 100644
--- a/files/en-us/web/api/element/mouseleave_event/index.md
+++ b/files/en-us/web/api/element/mouseleave_event/index.md
@@ -10,7 +10,7 @@ browser-compat: api.Element.mouseleave_event
 
 The **`mouseleave`** event is fired at an {{domxref("Element")}} when the cursor of a pointing device (usually a mouse) is moved out of it.
 
-`mouseleave` and {{domxref("Element/mouseout_event", "mouseout")}} are similar but differ in that `mouseleave` does not bubble and `mouseout` does. This means that `mouseleave` is fired when the pointer has exited the element _and_ all of its descendants, whereas `mouseout` is fired when the pointer leaves the element _or_ leaves one of the element's descendants (even if the pointer is still within the element). Other than that, leave and out events for the same situation are dispatched at the same time, if appropriate.
+`mouseleave` and {{domxref("Element/mouseout_event", "mouseout")}} are similar but differ in that `mouseleave` does not bubble and `mouseout` does. This means that `mouseleave` is fired when the pointer has exited the element _and_ all of its descendants, whereas `mouseout` is fired when the pointer leaves the element _or_ leaves one of the element's descendants, because of bubbling (even if the pointer is still within the element). Other than that, leave and out events for the same situation are dispatched at the same time, if appropriate.
 
 The `mouseleave` and `mouseout` events will not be triggered when the element is replaced or removed from the DOM.
 
diff --git a/files/en-us/web/api/element/mouseup_event/index.md b/files/en-us/web/api/element/mouseup_event/index.md
index 1b2c19b91f57826..ca6119a6f4edbe6 100644
--- a/files/en-us/web/api/element/mouseup_event/index.md
+++ b/files/en-us/web/api/element/mouseup_event/index.md
@@ -12,9 +12,6 @@ The **`mouseup`** event is fired at an {{domxref("Element")}} when a button on a
 
 `mouseup` events are the counterpoint to {{domxref("Element.mousedown_event", "mousedown")}} events.
 
-> [!NOTE]
-> This behavior is different from {{domxref("Element/pointerdown_event", "pointerdown")}} events. MouseDown events fire whenever any button on a mouse is pressed down. `pointerdown` events fire only upon the first button press; subsequent button presses don't fire `pointerdown` events.
-
 > [!NOTE]
 > This behavior is different from {{domxref("Element/pointerup_event", "pointerup")}} events. `mouseup` events fire whenever any button on a mouse is released. `pointerup` events fire only upon the last button release; previous button releases, while other buttons are held down, don't fire `pointerup` events.