HTML <base> Tag
Topic: HTML5 Tags ReferencePrev|Next
Description
The <base> tag defines the base URL and a common target to for all relative URLs contained within a document. There must be no more than one <base> tag per document.
The following table summarizes the usages context and the version history of this tag.
| Parent: | <head> |
|---|---|
| Content: | None. It is an empty element. |
| Start/End Tag: | Start tag: required, End tag: forbidden |
| Version: | HTML 2, 3.2, 4, 4.01, 5 |
Syntax
The basic syntax of the <base> tag is given with:
The example below shows the <base> tag in action.
Example
Try this code »<!DOCTYPE html>
<html lang="en">
<head>
<title>Example of HTML base tag</title>
<base href="https://www.tutorialrepublic.com/">
</head>
<body>
<p>Learn <a href="css-tutorial/">CSS</a>.</p>
</body>
</html>The relative URL "css-tutorial/" would resolve to:
Note: If multiple <base> tags are specified, only the first 'href' and first 'target' attribute's value are used, all others are ignored.
Tag-Specific Attributes
The following table shows the attributes that are specific to the <base> tag.
| Attribute | Value | Description |
|---|---|---|
| Required — One of the following attributes must be specified for the markup to be valid. | ||
href |
URL | Specifies the base URL for all relative URLs in the document. |
target |
_blank |
Specifies the default location to display the result when hyperlinks or forms in the document cause navigation. |
Global Attributes
Like all other HTML tags, the <base> tag supports the global attributes in HTML5.
Event Attributes
The <base> tag also supports the event attributes in HTML5.
Browser Compatibility
The <base> tag is supported in all major modern browsers.
 |
Basic Support—
|
Further Reading
See tutorial on: HTML Links.
Related tag: <a>.
