Pattern: Use of units for zero length
Issue: -
Lengths refer to distance measurements. A length is a dimension, which is a number immediately followed by a unit identifier. However, for zero lengths the unit identifier is optional. The length units are: em, ex, ch, vw, vh, cm, mm, in, pt, pc, px, rem, vmin, and vmax.
The following patterns are considered violations:
a { top: 0px; }
/** ↑↑
* This zero and this type of length unit */a { top: 0.000em }The following patterns are not considered violations:
a { top: 0 } /* no unit */a { transition-delay: 0s; } /* dimension */a { top: 2in; }a { top: 1.001vh }Ignore units for zero length in custom properties.
The following pattern is not considered a violation:
a { --x: 0px; }