HTML base Tag

by Online Tutorials Library July 14, 2022

HTML <base> tag

HTML <base> tag is used to specify a base URI or URL to use for all relative links contained within an HTML document.

Only one <base> element can be specified within a document, and it must be placed within <head> element. We can also specify how other links should open (in the same window, in another window, etc.) using the target attribute.

Syntax

In HTML <base> element does not contain closing tag but in XHTML end tag </base> is required.

Following are some specifications about the <base> tag

Display	None
Start tag/End tag	Only start-tag
Usage	Anchors and links

Example

Open in same window (by default)

  <!DOCTYPE html>  <html>  <head>  <title>Base tag</title>  <style>    a{text-decoration: none;  color:black;}    a:hover{color: green;                 font-size: 18px;}  </style>  <base href=”https://tutoraspire.com”>   </head>   <body>      <h2 style=”color: red; font-size: 30px; font-style: italic;”>List of Web developement Tutorial</h2>  <a href=”..//html-tutorial”>HTML tutorial</a><br>  <a href=”..//css-tutorial”>CSS tutorial</a><br>  <a href=”..//bootstrap-tutorial”>Bootstrap tutorial</a><br>  <a href=”..//javascript-tutorial”>JavaScript tutorial</a><br>  <a href=”..//jquery-tutorial”>JavaScript tutorial</a>    </body>  </html>  

Test it Now

In the above example we have used base URL =” https://tutoraspire.com” which all other relative links will treat as starting URL. Here (/) defines the root URL of the current document.

Open in new window (using _blank in <base> tag):

  <!DOCTYPE html>  <html>  <head>  <title>Base tag</title>  <style>    a{text-decoration: none;  color:black;}    a:hover{color: green;  font-size: 18px;}  </style>  <base href=”https://tutoraspire.com” target=”_blank”>   </head>   <body>      <h2 style=”color: red; font-size: 30px; font-style: italic;”>List of Web developement Tutorial</h2>  <a href=”..//html-tutorial”>HTML tutorial</a><br>  <a href=”..//css-tutorial”>CSS tutorial</a><br>  <a href=”..//bootstrap-tutorial”>Bootstrap tutorial</a><br>  <a href=”..//javascript-tutorial”>JavaScript tutorial</a><br>  <a href=”..//jquery-tutorial”>JavaScript tutorial</a>    </body>  </html>  

Test it Now

In the above example we have used target=”_blank” in only <base> tag but it is applied on whole document links.

Attribute

Tag Specific attributes:

Attribute	Value	Definition
href	URL	It specifies the base URL for all relative links.
target
		_blank	Open the relative link in the new window
		_self	Open the relative link in current window
		_parent	Open the relative link in the parent frame
		_top	Open the links in full width of the page

Global Attribute

The <base> tag supports all global attributes in HTML

Event Attribute

The <base> does not support the event attributes in HTML

Supporting Browsers

Element	Chrome	IE	Firefox	Opera	Safari
<base>	Yes	Yes	Yes	Yes	Yes

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