Local links in <iframe srcdoc> don’t seem to work

dabblet.css

/**
 * Local links in <iframe srcdoc> don’t seem to work
 */

dabblet.html

<iframe srcdoc='<a href="#foo">Link</a>
<p>f</p><p>f</p><p>f</p><p>f</p><p>f</p><p>f</p><p>f</p><p>f</p>
<p id="foo">here, here!</p>'></iframe>

dabblet.js

// alert('Hello world!');

settings.json

{"view":"split","fontsize":"110","seethrough":"","prefixfree":"","page":"html"}