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html - Page stuck in Quirks Mode

in Technique[技术] by (71.8m points)

Currently the page I am working displays fine in Chrome and Firefox, but in IE9 it is rendering in Quirks mode.

Looking into the issue further, it seems that 

<!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" xml:lang="en" lang="en"

is always getting commented out. Causing Quirks mode to stay in place as no doctype is specified. Basically, I am trying to force the page to render in normal IE9 and not quirks mode. However, something is causing the comment out. Regretfully, this is a wordpress theme that's why I am having a hard time fixing the issue as I didn't write the original code.

Anyone have suggestions?

Thank you!

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1 Answer

by (71.8m points)

I don't know what you mean by "[the doctype] is always getting commented out".

There are many different things that can cause Quirks Mode, see here.

Another common cause is having stuff before the doctype. Even invisible stuff.

You can fix this without debugging the actual problem if you add this in your <head>:

<meta http-equiv="X-UA-Compatible" content="IE=edge" />

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