Is it standard not to add a padding, margin, property next to 0?

HTML & CSS
1

If it’s 0, you’re not supposed to put, 0px, or, 0em, just 0 by itself?

2

You are correct!

Zero is zero, there is no place for any unit name. (Though you will see 0px in many web source codes)

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3

Is it standard not to add a padding, margin, property next to 0?

It’s not at all clear what you mean by that.

If you are setting a value of 0 for any attribute - margin, padding, border or whatever, then there is no need to add a unit. (Nothing is nothing; you can’t really measure it in px, em, inches, kilometres or anything else.)

margin: 5px 0 5px 0;

or

padding: 0;

or whatever.

3 Likes
4

Does that go for width and height also, or only padding and margin?

5

Zero is zero in all cases. :slight_smile:

5 Likes
6

or whatever is intended to cover whatever property you might be setting to zero. It seemed superfluous to list every possibility.

4 Likes
7

Doesn’t matter.
0 = 0px = 0em = 0rem = 0vh = 0pc, etc.

8

<ot>
Is it possible that XML or XHTML does not allow units of measure on “0”?

I didn’t believe that it mattered either until a couple of nights ago when I saw a validator error that said that such units were not permitted on zero. I think I was looking a some code from Blogger, but not sure. Wish I’d documented it, but I didn’t.
</ot>

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9

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