baseURI getter returns bogus values in some cases

[Boris Zbarsky]

Consider this web page:

  <iframe></iframe>
  <script>
    onload = function() {
      var doc = frames[0].document;
      doc.body.innerHTML = '<a href=""></a>'
      alert("Document base URI: " + doc.baseURI);
      alert("Anchor base URI: " + doc.querySelector('a').baseURI);
      alert("Anchor href: " + doc.querySelector('a').href);    }
  </script>

This should alert the URI of the web page three times.  In Safari it instead alerts "about:blank", "null", and the URI of the web page, respectively.

[Boris Zbarsky]

A live demo of this is available at http://jsfiddle.net/n0gdh5y4/5/

[Ahmad Saleem]

Here are updated test results across all browsers (using test case from Comment 01):

*** Safari 15.6 on macOS 12.5 ***

JSFiddle changed to "show":

Document base URI: https://fiddle.jshell.net/n0gdh5y4/5/show/light/
Anchor base URI: https://fiddle.jshell.net/n0gdh5y4/5/show/light/
Anchor href: https://fiddle.jshell.net/n0gdh5y4/5/show/light/

JSFiddle with "show" in URL (not Standalone but Editor mode):

Document base URI: https://fiddle.jshell.net/n0gdh5y4/5/show/?editor_console=
Anchor base URI: https://fiddle.jshell.net/n0gdh5y4/5/show/?editor_console=
Anchor href: https://fiddle.jshell.net/n0gdh5y4/5/show/?editor_console=

*** Chrome Canary 106 ***

Document base URI: https://fiddle.jshell.net/n0gdh5y4/5/show/light/
Anchor base URI: https://fiddle.jshell.net/n0gdh5y4/5/show/light/
Anchor href: https://fiddle.jshell.net/n0gdh5y4/5/show/light/

Document base URI: https://fiddle.jshell.net/n0gdh5y4/5/show/?editor_console=
Anchor base URI: https://fiddle.jshell.net/n0gdh5y4/5/show/?editor_console=
Anchor href: https://fiddle.jshell.net/n0gdh5y4/5/show/?editor_console=

*** Firefox Nightly 105 ***

Document base URI: https://fiddle.jshell.net/n0gdh5y4/5/show/light/
Anchor base URI: https://fiddle.jshell.net/n0gdh5y4/5/show/light/
Anchor href: https://fiddle.jshell.net/n0gdh5y4/5/show/light/

Document base URI: https://fiddle.jshell.net/n0gdh5y4/5/show/?editor_console=
Anchor base URI: https://fiddle.jshell.net/n0gdh5y4/5/show/?editor_console=
Anchor href: https://fiddle.jshell.net/n0gdh5y4/5/show/?editor_console=

_______________

I think it was fixed along the way since, I don't see any "about:blank", "null" etc. as mentioned from Comment 0. I think this can be marked as "RESOLVED CONFIGURATION CHANGED". Thanks!

[Ryosuke Niwa]

Nice. Thanks for testing!