# Summary For compatibility with WebKit and Blink, honor the character encoding declared using the XML declaration syntax in text/html.
For reasons explained in https://hsivonen.fi/utf-8-detection/ , unlike other encodings, UTF-8 isn't detected from content, so with the demise of Trident and EdgeHTML (which don't honor the XML declaration syntax in text/html), <?xml version="1.0" encoding="UTF-8"?> has become a more notable Web compat problem for us. With non-Latin scripts, the failure mode is particularly bad for a Web compat problem: The text is completely unreadable. That is, this isn't a feature for Web authors to use. This is to address a push factor for users when authors do use this feature. # Bug https://bugzilla.mozilla.org/show_bug.cgi?id=673087 # Standard https://github.com/whatwg/html/pull/1752 # Platform coverage All # Preference To be enabled unconditionally. # DevTools bug No integration needed. # Other browsers WebKit has had this behavior for a very long time and didn't remove it when HTML parsing was standardized. Blink inherited this from WebKit upon forking. Trident and EdgeHTML don't have this; their demise changed the balance for this feature. # web-platform-tests https://hsivonen.com/test/moz/xml-decl/ contains tests which are wrapped for WPT as part of the Gecko patch. -- Henri Sivonen hsivo...@mozilla.com _______________________________________________ dev-platform mailing list dev-platform@lists.mozilla.org https://lists.mozilla.org/listinfo/dev-platform
