The HTMLHyperlinkElementUtils.host property is a USVString containing the host, that is the hostname, and then, if the port of the URL is nonempty, a ':', and the port of the URL.
string = object.host; object.host = string;
var anchor = document.createElement("a");
anchor.href = "https://developer.mozilla.org/en-US/HTMLHyperlinkElementUtils.host"
anchor.host == "developer.mozilla.org"
anchor.href = "https://developer.mozilla.org:443/en-US/HTMLHyperlinkElementUtils.host"
anchor.host == "developer.mozilla.org"
// The port number is not included because 443 is the scheme's default port
anchor.href = "https://developer.mozilla.org:4097/en-US/HTMLHyperlinkElementUtils.host"
anchor.host == "developer.mozilla.org:4097"
 | Specification | Status | Comment | 
|---|---|---|
| HTML Living Standard The definition of 'HTMLHyperlinkElementUtils.host' in that specification.  |  Living Standard | Initial definition | 
| Desktop | ||||||
|---|---|---|---|---|---|---|
| Chrome | Edge | Firefox | Internet Explorer | Opera | Safari | |
| Basic support |  Yes
  | 
Yes |  22
  | 
 No
  | 
No | No | 
| Mobile | |||||||
|---|---|---|---|---|---|---|---|
| Android webview | Chrome for Android | Edge Mobile | Firefox for Android | Opera for Android | iOS Safari | Samsung Internet | |
| Basic support |  Yes
  | 
 Yes
  | 
Yes |  22
  | 
No | No | ? | 
HTMLHyperlinkElementUtils interface it belongs to.
    © 2005–2018 Mozilla Developer Network and individual contributors.
Licensed under the Creative Commons Attribution-ShareAlike License v2.5 or later.
    https://developer.mozilla.org/en-US/docs/Web/API/HTMLHyperlinkElementUtils/host