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Editorial Team
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Asked: 2026-05-23T08:41:44+00:00

I was having problems with cross-browser compatibility and found out a plugin called Browser

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I was having problems with cross-browser compatibility and found out a plugin called “Browser Compatibilty Detector” for Chrome. It recommended adding a DTD to renders the page in standards mode.

I added this:

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">

It brought new issues and fixed others but at least now all browsers are working kinda the same.

However it’s still recommending adding a DTD for another issue:

In IE6 IE7(Q) IE8(Q), the container will be enlarged when its 'width' or 'height' is not big enough to hold all its contents
Content box's size in Chrome: 1366 * 0, in IE: 1366 * 653.
Suggestion: Use a DTD that makes the page rendered in Standards Mode, so that only IE6(S) will be affected.

What type of doctype should I add? I didn’t even know they existed until 5 minutes ago so I have no idea what to write.

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1 Answer

  1. Editorial Team

    I suggest you add the HTML5 docytype only

    <!DOCTYPE html>

    so that your code will be future friendly AND then start pinpointing and fixing the cross-browser issues that crop up.

    Also, if you do not need to be supporting legacy browsers like IE6 and IE7, then you can start to ignore them. Check you stats to see if support is even merited.

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