CSS suffix Descriptor
The CSS suffix descriptor is used with the @counter-style at-rule to add a suffix to the marker representation.
The @counter-style rule accepts a name, followed by a number of descriptors, which define the counter style. The suffix descriptor can be used to append a symbol to the marker representation. This suffix appears after any negative sign (i.e. if using negative values).
Here's an example of using the suffix descriptor.
If your browser supports the @counter-style at-rule, the above code could result in a list that looks something like this:
Possible Values
The suffix descriptor accepts the following values.
The symbol can be a string, image, or custom-ident.
The initial value is "\2E\20" (. full stop followed by a space).
Official Specifications
The suffix descriptor is defined in CSS Counter Styles Level 3 (W3C Candidate Recommendation, 11 June 2015).