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Editorial Team
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Asked: 2026-05-22T21:27:01+00:00

I have a main frameset page, which uses the FRAMESET doctype..Now this has 3

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I have a main frameset page, which uses the FRAMESET doctype..Now this has 3 frames inside it..

Now for the 2nd frame, I want to use some HTML5 code ()…So guess I’ll have to use the doctype

Now my question is; can both these doctypes co-exist, which means can I declare FRAMESET doctype for the main frameset page and HTML5 Doctype for one of the frame page..

Can it cause any cross-browser issues?
Also before you say, I know this is a strange question as I am using old/outdated frameset with the latest HTML5…But I have limited options (In fact, can’t edit the main frameset page to use iframes)…So want to know how can I combine the 2?

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1 Answer

  1. Editorial Team

    Doctypes are specific to documents and each document has its own independent doctype. Having a different doctype in each frame is perfectly valid, and having the doctype of the frameset be different from the doctype of the frames is not only valid, it’s impossible for it to be otherwise. Whether it’s HTML 5 doesn’t really enter into it.

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