HTML <base> href Attribute

<head>
  <base href="/html/">
</head>
<body>
  
<img src="smiley.png" alt="smiley">

</body>

Meaning

Hyperlink of the page used to all relative URLs in the page.

The base URL to be used throughout the document for relative URLs.

Note: Absolute and relative URLs are allowed.

<base href="URL">

Value	Description
URL	Value can be An absolute URL - target within or another web site ( href="http://www.example.com/") A relative URL - target within a web site ( href="/image/")