Fix promise rejection events (#15244)

files/en-us/_redirects.txt

@@ -9735,13 +9735,13 @@
 /en-US/docs/Web/API/Window/onmouseover	/en-US/docs/Web/API/GlobalEventHandlers/onmouseover
 /en-US/docs/Web/API/Window/onmouseup	/en-US/docs/Web/API/GlobalEventHandlers/onmouseup
 /en-US/docs/Web/API/Window/onpopstate	/en-US/docs/Web/API/Window/popstate_event
-/en-US/docs/Web/API/Window/onrejectionhandled	/en-US/docs/Web/API/WindowEventHandlers/onrejectionhandled
+/en-US/docs/Web/API/Window/onrejectionhandled	/en-US/docs/Web/API/Window/rejectionhandled_event
 /en-US/docs/Web/API/Window/onreset	/en-US/docs/Web/API/GlobalEventHandlers/onreset
 /en-US/docs/Web/API/Window/onresize	/en-US/docs/Web/API/GlobalEventHandlers/onresize
 /en-US/docs/Web/API/Window/onselect	/en-US/docs/Web/API/GlobalEventHandlers/onselect
 /en-US/docs/Web/API/Window/onstorage	/en-US/docs/Web/API/Window/storage_event
 /en-US/docs/Web/API/Window/onsubmit	/en-US/docs/Web/API/GlobalEventHandlers/onsubmit
-/en-US/docs/Web/API/Window/onunhandledrejection	/en-US/docs/Web/API/WindowEventHandlers/onunhandledrejection
+/en-US/docs/Web/API/Window/onunhandledrejection	/en-US/docs/Web/API/Window/unhandledrejection_event
 /en-US/docs/Web/API/Window/onunload	/en-US/docs/Web/API/Window/unload_event
 /en-US/docs/Web/API/Window/onuserproximity	/en-US/docs/Web/API/UserProximityEvent
 /en-US/docs/Web/API/Window/onvrdisplayactivate	/en-US/docs/Web/API/Window/vrdisplayactivate_event
@@ -9780,7 +9780,9 @@
 /en-US/docs/Web/API/WindowEventHandlers/onmessage	/en-US/docs/Web/API/Window/message_event
 /en-US/docs/Web/API/WindowEventHandlers/onmessageerror	/en-US/docs/Web/API/Window/messageerror_event
 /en-US/docs/Web/API/WindowEventHandlers/onpopstate	/en-US/docs/Web/API/Window/popstate_event
+/en-US/docs/Web/API/WindowEventHandlers/onrejectionhandled	/en-US/docs/Web/API/Window/rejectionhandled_event
 /en-US/docs/Web/API/WindowEventHandlers/onstorage	/en-US/docs/Web/API/Window/storage_event
+/en-US/docs/Web/API/WindowEventHandlers/onunhandledrejection	/en-US/docs/Web/API/Window/unhandledrejection_event
 /en-US/docs/Web/API/WindowEventHandlers/onunload	/en-US/docs/Web/API/Window/unload_event
 /en-US/docs/Web/API/WindowEventHandlers/rejectionhandled_event	/en-US/docs/Web/API/Window/rejectionhandled_event
 /en-US/docs/Web/API/WindowEventHandlers/unhandledrejection_event	/en-US/docs/Web/API/Window/unhandledrejection_event

files/en-us/_wikihistory.json

@@ -85247,29 +85247,6 @@
       "Ehsan"
     ]
   },
-  "Web/API/WindowEventHandlers/onrejectionhandled": {
-    "modified": "2020-10-15T21:38:13.769Z",
-    "contributors": [
-      "mfluehr",
-      "fscholz",
-      "Sheppy",
-      "chrisdavidmills",
-      "rolfedh",
-      "jpmedley"
-    ]
-  },
-  "Web/API/WindowEventHandlers/onunhandledrejection": {
-    "modified": "2020-10-15T21:38:15.201Z",
-    "contributors": [
-      "mfluehr",
-      "fscholz",
-      "Sheppy",
-      "chrisdavidmills",
-      "teoli",
-      "rolfedh",
-      "jpmedley"
-    ]
-  },
   "Web/API/Worker": {
     "modified": "2020-10-15T21:10:11.615Z",
     "contributors": [

files/en-us/web/api/promiserejectionevent/promise/index.md

@@ -63,5 +63,5 @@ window.onunhandledrejection = function(event) {
     rejection events")}}
 - {{jsxref("Promise")}}
 - {{domxref("PromiseRejectionEvent")}}
-- {{event("rejectionhandled")}}
+- {{domxref("Window.rejectionhandled_event", "rejectionhandled")}}
 - {{domxref("Window.unhandledrejection_event", "unhandledrejection")}}

files/en-us/web/api/promiserejectionevent/promiserejectionevent/index.md

@@ -24,7 +24,7 @@ for errors.
 
 There are two types of `PromiseRejectionEvent`:
 {{domxref("Window.unhandledrejection_event", "unhandledrejection")}} is sent by the JavaScript runtime when a promise is
-rejected but the rejection goes unhandled. A {{event("rejectionhandled")}} event is
+rejected but the rejection goes unhandled. A {{domxref("Window.rejectionhandled_event", "rejectionhandled")}}event is
 emitted if a promise is rejected but the rejection is caught by a rejection handler.
 
 ## Syntax
@@ -41,8 +41,7 @@ _The `PromiseRejectionEvent()` constructor also inherits parameters from
 - `type`
   - : A string representing the name of the type of the
     `PromiseRejectionEvent`. This is case-sensitive and should be one of
-    {{event("rejectionhandled", '"rejectionhandled"')}} or {{event("unhandledrejection",
-    '"unhandledrejection"')}}, to match the event names of the possible (non-synthetic)
+    {{domxref("Window.rejectionhandled_event", "rejectionhandled")}} or {{domxref("Window.unhandledrejection_event", "unhandledrejection")}}, to match the event names of the possible (non-synthetic)
     {{domxref("PromiseRejectionEvent")}} events that user agents can actually fire).
 - `options`
 

files/en-us/web/api/promiserejectionevent/reason/index.md

@@ -46,5 +46,5 @@ window.onunhandledrejection = function(e) {
 
 - {{jsxref("Promise")}}
 - {{domxref("PromiseRejectionEvent")}}
-- {{event("rejectionhandled")}}
+- {{domxref("Window.rejectionhandled_event", "rejectionhandled")}}
 - {{domxref("Window.unhandledrejection_event", "unhandledrejection")}}

files/en-us/web/api/window/index.md

@@ -309,8 +309,6 @@ These are properties of the window object that can be set to establish event han
 
 _This interface inherits event handlers from the {{domxref("EventTarget")}} interface and implements event handlers from {{domxref("WindowEventHandlers")}}._
 
-- {{domxref("WindowEventHandlers.onrejectionhandled")}}
-  - : An event handler for handled {{jsxref("Promise")}} rejection events.
 - {{domxref("Window.onuserproximity")}} {{deprecated_inline}}
   - : An event handler property for user proximity events (see {{domxref("UserProximityEvent")}}).
 
@@ -368,8 +366,6 @@ _This interface inherits event handlers from the {{domxref("EventTarget")}} inte
   - : Is an [event handler](/en-US/docs/Web/Events/Event_handlers) representing the code to be called when the {{event("selectionchange")}} event is raised.
 - {{domxref("GlobalEventHandlers.onsubmit")}}
   - : Called when a form is submitted
-- {{domxref("WindowEventHandlers.onunhandledrejection")}} {{experimental_inline}}
-  - : An event handler for unhandled {{jsxref("Promise")}} rejection events.
 
 ## Events
 
@@ -504,10 +500,8 @@ Listen to these events using [`addEventListener()`](/en-US/docs/Web/API/EventTar
 
 - {{domxref("Window/rejectionhandled_event", "rejectionhandled")}}
   - : Sent every time a JavaScript {{jsxref("Promise")}} is rejected, regardless of whether or not there is a handler in place to catch the rejection.
-    Also available through the {{domxref("WindowEventHandlers/onrejectionhandled", "onrejectionhandled")}} event handler property.
 - {{domxref("Window/unhandledrejection_event", "unhandledrejection")}}
   - : Sent when a JavaScript {{jsxref("Promise")}} is rejected but there is no handler in place to catch the rejection.
-    Also available using the {{domxref("WindowEventHandlers/onunhandledrejection", "onunhandledrejection")}} event handler property.
 
 ### Transition events
 

files/en-us/web/api/window/rejectionhandled_event/index.md

@@ -23,28 +23,35 @@ The **`rejectionhandled`** event is sent to the script's global scope (usually {
 
 This can be used in debugging and for general application resiliency, in tandem with the {{domxref("Window.unhandledrejection_event", "unhandledrejection")}} event, which is sent when a promise is rejected but there is no handler for the rejection.
 
-<table class="properties">
-  <tbody>
-    <tr>
-      <th scope="row">Bubbles</th>
-      <td>No</td>
-    </tr>
-    <tr>
-      <th scope="row">Cancelable</th>
-      <td>No</td>
-    </tr>
-    <tr>
-      <th scope="row">Interface</th>
-      <td>{{domxref("PromiseRejectionEvent")}}</td>
-    </tr>
-    <tr>
-      <th scope="row">Event handler property</th>
-      <td>
-        {{domxref("WindowEventHandlers.onrejectionhandled", "onrejectionhandled")}}
-      </td>
-    </tr>
-  </tbody>
-</table>
+## Syntax
+
+Use the event name in methods like {{domxref("EventTarget.addEventListener", "addEventListener()")}}, or set an event handler property.
+
+```js
+addEventListener('rejectionhandled', event => { });
+onrejectionhandled = event => { };
+```
+
+## Event type
+
+A {{domxref("PromiseRejectionEvent")}}. Inherits from {{domxref("Event")}}.
+
+{{InheritanceDiagram("PromiseRejectionEvent")}}
+
+## Event properties
+
+- {{domxref("PromiseRejectionEvent.promise")}} {{readonlyInline}}
+  - : The JavaScript {{jsxref("Promise")}} that was rejected.
+- {{domxref("PromiseRejectionEvent.reason")}} {{readOnlyInline}}
+  - : A value or {{jsxref("Object")}} indicating why the promise was rejected, as passed to {{jsxref("Promise.reject()")}}.
+
+## Event handler aliases
+
+In addition to the `Window` interface, the event handler property `onrejectionhandled` is also available on the following targets:
+
+- {{domxref("HTMLBodyElement")}}
+- {{domxref("HTMLFrameSetElement")}}
+- {{domxref("SVGSVGElement")}}
 
 ## Example
 

files/en-us/web/api/window/unhandledrejection_event/index.md

@@ -23,42 +23,42 @@ The **`unhandledrejection`** event is sent to the global scope of a script when
 
 This is useful for debugging and for providing fallback error handling for unexpected situations.
 
-<table class="properties">
-  <tbody>
-    <tr>
-      <th scope="row">Bubbles</th>
-      <td>No</td>
-    </tr>
-    <tr>
-      <th scope="row">Cancelable</th>
-      <td>Yes</td>
-    </tr>
-    <tr>
-      <th scope="row">Interface</th>
-      <td>{{domxref("PromiseRejectionEvent")}}</td>
-    </tr>
-    <tr>
-      <th scope="row">Event handler property</th>
-      <td>
-        {{domxref("WindowEventHandlers.onunhandledrejection", "onunhandledrejection")}}
-      </td>
-    </tr>
-  </tbody>
-</table>
+## Syntax
+
+Use the event name in methods like {{domxref("EventTarget.addEventListener", "addEventListener()")}}, or set an event handler property.
+
+```js
+addEventListener('unhandledrejection', event => { });
+onunhandledrejection = event => { };
+```
+
+## Event type
+
+A {{domxref("PromiseRejectionEvent")}}. Inherits from {{domxref("Event")}}.
+
+{{InheritanceDiagram("PromiseRejectionEvent")}}
+
+## Event properties
+
+- {{domxref("PromiseRejectionEvent.promise")}} {{readonlyInline}}
+  - : The JavaScript {{jsxref("Promise")}} that was rejected.
+- {{domxref("PromiseRejectionEvent.reason")}} {{readOnlyInline}}
+  - : A value or {{jsxref("Object")}} indicating why the promise was rejected, as passed to {{jsxref("Promise.reject()")}}.
+
+## Event handler aliases
+
+In addition to the `Window` interface, the event handler property `onunhandledrejection` is also available on the following targets:
+
+- {{domxref("HTMLBodyElement")}}
+- {{domxref("HTMLFrameSetElement")}}
+- {{domxref("SVGSVGElement")}}
 
 ## Usage notes
 
 Allowing the `unhandledrejection` event to bubble will eventually result in an error message being output to the console. You can prevent this by calling {{domxref("Event.preventDefault", "preventDefault()")}} on the {{domxref("PromiseRejectionEvent")}}; see [Preventing default handling](#preventing_default_handling) below for an example.
 
 ## Examples
 
-Here we have a few examples showing ways you can make use of the `unhandledrejection` event. The event includes two useful pieces of information:
-
-- `promise`
-  - : The actual {{jsxref("Promise")}} which was rejected with no handler available to deal with the rejection.
-- `reason`
-  - : The reason that would have been passed into the rejection handler if one had existed. See {{jsxref("Promise.catch", "catch()")}} for details.
-
 ### Basic error logging
 
 This example logs information about the unhandled promise rejection to the console.
@@ -69,7 +69,7 @@ window.addEventListener("unhandledrejection", event => {
 });
 ```
 
-You can also use the {{domxref("WindowEventHandlers.onunhandledrejection", "onunhandledrejection")}} event handler property to set up the event listener:
+You can also use the `onunhandledrejection` event handler property to set up the event listener:
 
 ```js
 window.onunhandledrejection = event => {
@@ -103,6 +103,5 @@ window.addEventListener('unhandledrejection', function (event) {
 ## See also
 
 - {{SectionOnPage("/en-US/docs/Web/JavaScript/Guide/Using_promises", "Promise rejection events")}}
-- {{domxref("WindowEventHandlers.onunhandledrejection", "onunhandledrejection")}} event handler property
 - {{domxref("Window/rejectionhandled_event", "rejectionhandled")}} event
 - {{jsxref("Promise")}}

files/en-us/web/api/windoweventhandlers/index.md

@@ -20,11 +20,6 @@ The **`WindowEventHandlers`** mixin describes the event handlers common to sever
 
 _The events properties, of the form `onXYZ`, are defined on the {{domxref("WindowEventHandlers")}}, and implemented by {{domxref("Window")}}, and {{domxref("WorkerGlobalScope")}} for Web Workers._
 
-- {{domxref("WindowEventHandlers.onrejectionhandled")}}
-  - : Is an [event handler](/en-US/docs/Web/Events/Event_handlers) representing the code to be called when the {{event("rejectionhandled")}} event is raised, indicating that a {{jsxref("Promise")}} was rejected and the rejection has been handled.
-- {{domxref("WindowEventHandlers.onunhandledrejection")}}
-  - : Is an [event handler](/en-US/docs/Web/Events/Event_handlers) representing the code to be called when the {{domxref("Window.unhandledrejection_event", "unhandledrejection")}} event is raised, indicating that a {{jsxref("Promise")}} was rejected but the rejection was not handled.
-
 ## Methods
 
 _This interface defines no method._