Detail domain name for hostname

files/en-us/web/api/location/hostname/index.md

@@ -9,7 +9,7 @@ browser-compat: api.Location.hostname
 {{ApiRef("URL API")}}
 
 The **`hostname`** property of the {{domxref("Location")}}
-interface is a string containing the domain of the URL.
+interface is a string containing the {{glossary("domain name")}} of the URL.
 
 ## Value
 
@@ -20,6 +20,11 @@ A string.
 ```js
 console.log(window.location.hostname);
 // developer.mozilla.org
+
+const anchor = document.createElement("a");
+anchor.href = "https://developer.mozilla.org:4097/";
+console.log(anchor.hostname === "developer.mozilla.org");
+// The port number is not included in hostname
 ```
 
 ## Specifications