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Asked: 2026-05-25T00:29:17+00:00

<!DOCTYPE html xmlns=http://www.w3.org/1999/xhtml xmlns:fb=http://www.facebook.com/2008/fbml> When I added xmlns, the text boxes got shorter. It’s

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<!DOCTYPE html  xmlns="http://www.w3.org/1999/xhtml" xmlns:fb="http://www.facebook.com/2008/fbml">

When I added xmlns, the text boxes got shorter. It’s screwing up all of my styles for my input boxes. Why?

Note: I see that in my developer console, this was added to the text boxes:

input:not([type="image"]), textarea {
box-sizing: border-box;
}

What is this and how do I get rid of it?

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1 Answer

  1. Editorial Team

    To override what is being set:

    input:not([type="image"]), textarea {
    box-sizing: content-box !important;
}

    The default box-sizing property is content-box. When you use the xmlns, some browsers might change the box model because it thinks it should. That’s probably a good thing. For places it causes you problems, simply override their styles.

    Edit: I just noticed what @Alohci did, that is, that you are putting the xmlns on the doctype tag instead of the html tag. You can patch it if you’d like to, but I’d recommend moving the attribute to html and see if that keeps things the way they should be.

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