The HTMLAreaElement.username property is a string containing the username specified before the domain name. 
 The HTMLAreaElement.username property is a string containing the username specified before the domain name. 
A string.
js
// An <area id="myArea" href="https://anonymous:[email protected]/en-US/docs/HTMLAreaElement"> element is in the document const area = document.getElementByID("myArea"); area.username; // returns 'anonymous'
| Specification | 
|---|
| HTML Standard  # dom-hyperlink-username-dev  | 
| Desktop | Mobile | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Chrome | Edge | Firefox | Internet Explorer | Opera | Safari | WebView Android | Chrome Android | Firefox for Android | Opera Android | Safari on IOS | Samsung Internet | |
username | 
32 | 79 | 26 | No | 19 | 10 | 4.4.3 | 32 | 26 | 19 | 10 | 2.0 | 
HTMLAreaElement interface it belongs to.
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    https://developer.mozilla.org/en-US/docs/Web/API/HTMLAreaElement/username