Question

TYPO3 seems to alter the output of my Frontend extension.

Simple Testcase:

function main($content, $conf)
{
        $this->conf = $conf;
        $this->pi_setPiVarDefaults();
        $this->pi_loadLL();

        return '<a href="#test">test</a>';
}

When I call a page with this extension in the frontend i get:

<a href="pagename/?no_cache=1&action=show&id=3378#test">test</a>

Basically it prepends the path I used to access the page to the anchor link.
What could be responsible for this behaviour? RealURL?

How can I disable it?

Answer 1

You probably have somwhere in your TS template (in Setup) enabled prefixing:

config.prefixLocalAnchors = all

Note, that if you have set config.baseURL=http://some.tld/ and enabled RealURL this is required, otherwise all anchor links will be redirected to the main page:

http://some.tld/#test

instead of

http://some.tld/pagename/sub/other-sub#test