Question

Can a dimension in css be set to “0”, without any units? Because in my world “0 px” is exactly as long as “0 cm”, “0 em” and even “0%”.

Example:

width:0;

Thank you!

Answer 1

Yes, it can: a non-unit 0 measurement is absolutely fine:

Lengths refer to distance measurements and are denoted by <length> in the property definitions. A length is a dimension. A zero length may be represented instead as the <number> ‘0’. (In other words, for zero lengths the unit identifier is optional.)

(Emphasis mine).

Reference:

• Distance units the ‘<length>‘ type.