Units are CSS units like em
or px
. Most of them are defined in the
CSS Values and Units specification.
A unit object looks like this:
"ch": {
"groups": [
"CSS Units",
"CSS Lengths"
],
"status": "standard"
}
The 2 properties are both required.
groups
(array of strings): CSS is organized in modules like "CSS Units" or "CSS Lengths". MDN organizes features in these groups as well —groups
should contain the name of the module(s) the unit is defined in.status
(enum string): This is eitherstandard
,nonstandard
,experimental
orobsolete
depending on the standardization status of the feature.