CSS: em, px, pt, cm, in… - W3
em, px, pt, cm, in…. CSS offers a number of different units for expressing length. Some have their history in typography, such as point (pt) and pica (pc), others are known from everyday use, such as centimeter (cm) and inch (in).And there is also a “magic” unit that was invented specifically for CSS: the px.Does that mean different properties need different units?
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