This vector shows what entities cause an external URL when used before an @
const div = document.createElement('div');div.innerHTML=`<a href="https://psres.net$[data1]@example.com" id=x>test</a>`;if(x.host !== 'example.com') {0x0D
log('$[data1]');0x0D
}div.innerHTML=`<a href="https://psres.net\@example.com" id=x>test</a>`;div.innerHTML=`<a href="https://psres.net#@example.com" id=x>test</a>`;div.innerHTML=`<a href="https://psres.net?@example.com" id=x>test</a>`;div.innerHTML=`<a href="https://psres.net/@example.com" id=x>test</a>`;