The HTMLHyperlinkElementUtils.protocol property is a USVString representing the protocol scheme of the URL, including the final ':'.
string = object.protocol; object.protocol = string;
// Let's an <a id="myAnchor" href="https://developer.mozilla.org/en-US/HTMLHyperlinkElementUtils.protocol"> element be in the document
var anchor = document.getElementByID("myAnchor");
var result = anchor.protocol; // Returns:'https:'
 | Specification | Status | Comment | 
|---|---|---|
| HTML Living Standard The definition of 'HTMLHyperlinkElementUtils.protocol' in that specification.  |  Living Standard | Initial definition. | 
| Desktop | ||||||
|---|---|---|---|---|---|---|
| Chrome | Edge | Firefox | Internet Explorer | Opera | Safari | |
| Basic support |  Yes
  | 
No |  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
  | 
No |  22
  | 
No | No | ? | 
HTMLHyperlinkElementUtils interface it belongs to.
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Licensed under the Creative Commons Attribution-ShareAlike License v2.5 or later.
    https://developer.mozilla.org/en-US/docs/Web/API/HTMLHyperlinkElementUtils/protocol