Add docs for ErrorEvent.message (mdn#36280)

* add

* add a simple example

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

@@ -21,7 +21,7 @@ The **`ErrorEvent`** interface represents events providing information related t
 _Also inherits properties from its parent {{domxref("Event")}}_.
 
 - {{domxref("ErrorEvent.message")}} {{ReadOnlyInline}}
-  - : A string containing a human-readable error message describing the problem. Lacking a [`crossorigin`](/en-US/docs/Web/HTML/Attributes/crossorigin) setting reduces error logging.
+  - : A string containing a human-readable error message describing the problem.
 - {{domxref("ErrorEvent.filename")}} {{ReadOnlyInline}}
   - : A string containing the name of the script file in which the error occurred.
 - {{domxref("ErrorEvent.lineno")}} {{ReadOnlyInline}}

files/en-us/web/api/errorevent/message/index.md

@@ -0,0 +1,31 @@
+---
+title: "ErrorEvent: message property"
+short-title: message
+slug: Web/API/ErrorEvent/message
+page-type: web-api-instance-property
+browser-compat: api.ErrorEvent.message
+---
+
+{{APIRef("HTML DOM")}}{{AvailableInWorkers}}
+
+The **`message`** read-only property of the {{domxref("ErrorEvent")}} interface returns a string containing a human-readable error message describing the problem.
+
+## Value
+
+A string.
+
+## Examples
+
+```js
+window.addEventListener("error", (ev) => {
+  console.log("The error message: " + ev.message);
+});
+```
+
+## Specifications
+
+{{Specifications}}
+
+## Browser compatibility
+
+{{Compat}}