docs(preventdefault): add info about passive listener (#36098)

* Update index.md * Update files/en-us/web/api/event/preventdefault/index.md Co-authored-by: Joshua Chen <[email protected]> * Update files/en-us/web/api/event/preventdefault/index.md Co-authored-by: Joshua Chen <[email protected]> * Update index.md --------- Co-authored-by: Joshua Chen <[email protected]>
mdn · Sep 30, 2024 · a845f9d · a845f9d
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diff --git a/files/en-us/web/api/event/preventdefault/index.md b/files/en-us/web/api/event/preventdefault/index.md
@@ -21,6 +21,8 @@ non-cancelable event, such as one dispatched via
 {{domxref("EventTarget.dispatchEvent()")}}, without specifying
 `cancelable: true` has no effect.
 
+If a passive listener calls `preventDefault()`, nothing will happen and a console warning may be generated.
+
 ## Syntax
 
 ```js-nolint

diff --git a/files/en-us/web/api/eventtarget/addeventlistener/index.md b/files/en-us/web/api/eventtarget/addeventlistener/index.md
@@ -74,7 +74,7 @@ addEventListener(type, listener, useCapture)
         `listener` would be automatically removed when invoked. If not specified, defaults to `false`.
     - `passive` {{optional_inline}}
 
-      - : A boolean value that, if `true`, indicates that the function specified by `listener` will never call {{domxref("Event.preventDefault", "preventDefault()")}}. If a passive listener does call `preventDefault()`, the user agent will do nothing other than generate a console warning.
+      - : A boolean value that, if `true`, indicates that the function specified by `listener` will never call {{domxref("Event.preventDefault", "preventDefault()")}}. If a passive listener calls `preventDefault()`, nothing will happen and a console warning may be generated.
 
         If this option is not specified it defaults to `false` – except that in browsers other than Safari, it defaults to `true` for {{domxref("Element/wheel_event", "wheel")}}, {{domxref("Element/mousewheel_event", "mousewheel")}}, {{domxref("Element/touchstart_event", "touchstart")}} and {{domxref("Element/touchmove_event", "touchmove")}} events. See [Using passive listeners](#using_passive_listeners) to learn more.