Sets or gets the relationship between the page containing the panel button link and the target page.
The panel button's rel property provides additional context to search engines
and browsers about how they should treat the link, influencing SEO, security, and
other link behavior.
Supported values:
'noopener': Prevents the target page from accessing the source page with the
window.opener property,
reducing the risk of malicious code.'noreferrer': Prevents the browser from sending referrer information, such as the URL of
the source page, to the target page. This enhances user privacy by ensuring the target page can't
track the origin of the visit.'nofollow': Tells search engines not to pass SEO link equity to the target page. This helps
prevent the manipulation of search rankings and maintains the integrity of your site's SEO.'sponsored': Indicates that the link is part of a paid or promotional arrangement,
ensuring transparency and compliance with search engine guidelines.Panel buttons can have multiple rel values as a single string with each value separated by a space.
For example, 'nofollow sponsored'.
The default value for external web links (starting with http:// and https://) is 'noopener'.