Automatic Tests fail with chrome >= 120

[florian-sanders-cc]

Context

With chrome >= 120, the i18n-sanitize tests fail.

 ❌ filter > Only keep href and title attributes on <a> (remove every other attributes)
      AssertionError: expected 5 to equal 3
      + expected - actual
      
      -5
      +3
      
      at test/i18n-sanitize.test.js:24:47
      at Array.forEach (<anonymous>)
      at compareChildNodes (test/i18n-sanitize.test.js:8:23)
      at o.<anonymous> (test/i18n-sanitize.test.js:98:5)

Explanation

Tests fail because the sanitize function adds `target` and `rel` attributes on the sanitized anchor element while it did not with previous chrome versions.

The sanitize function tests if the origin of the sanitized link (node.origin) equals window.location.origin.
If origins are different, it adds the target="_blank" and rel="..." attributes.

It looks like node.origin for a sanitized link with <a href="/foo">toto</toto> now results in an empty string while it resulted to http://localhost... (or whatever) before.

It only happens with anchor elements inside a document fragment, which is what the sanitize function returns.

How to reproduce the root cause of the issue?

const template = document.createElement('template');
template.innerHTML = `<a href="/toto">toto</a>`;

const anchorEl = template.content.querySelector('a');
console.log({ origin: anchorEl.origin })
// with chrome 119, origin = your localhost
// with chrome 120, origin = empty string