<base href=/in-front/"http://foo.com/images/" target="_blank">
<base href="/in-front/" target="_blank">
<a href=/in-front/"https://foo.com/images/">Foo</a>
<a href="/in-front/">Foo</a>
<a href="/in-front//foo.com">Foo</a>
<img src=/in-front/"bar/foo.png" />
<img src="/in-front/bar/foo.png" />