Menu
My pages are written and declared as XHTML 1.0 Strict. The first lines goes like this:
<?xml version="1.0" encoding="utf-8" ?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
Which I belive is correct for a XHTML 1.0 Strict but nevertheless IE11 gives this warning:
HTML1406: Invalid tag start: "<?". Question marks should not start tags. File: default.aspx, Line: 1, Column: 2
Anyone know if this is somthing I should worry about?
259
The problem is that although you have created a file with an XHTML doctype you have served it using a text/html media type.
So IE11 (and other browsers) treat the file as an HTML file and parse it with their HTML parser. An XML declaration in an HTML file is invalid, and that's what the browser is telling you. If you had served the file with an application/xhtml+xml media type, the browser would have treated the file as XHTML and used its XML parser to parse it. Then the XML declaration would be handled correctly according the XML rules and IE11 would not give you that warning message.
There's no real problem here. The HTML parser will treat the declaration as a bogus comment and just carry on regardless.
For more information you should read Sending XHTML as text/html Considered Harmful and/or HTML 4, HTML 5, XHTML, MIME types - the definitive resource
174
If you love us? You can donate to us via Paypal or buy me a coffee so we can maintain and grow! Thank you!
Donate Us With
