base

I. Description

The HTML base element allows you to define a partial or full url which will be prepended to all relative urls found in the HTML document. The base element must have either a target attribute, or an href attribute, or both a target and href attribute.

The base element must appear prior to all elements which have an href attribute.

There may be at most one base element in an HTML document.

II. Examples

<!DOCTYPE html>
<html>
    <head>
        <title>Example Page</title>
        <base href="https://www.google.com">
    </head>
    <body>
        <h1>Google Products and Services</h1>
        <p>Below are some links to Google products and/or services.</p>
        <a href="/finance">Google Finance</a>
        <a href="/news">Google News</a>
        <a href="/images">Google Images</a>
    </body>
</html>