Utility for converting CSS files using external rules

An example config.json contains rules for RTL conversion

Usage example: node bin/rtl-css.js -i ./test/fixtures/input.css -c config.json -d rtl

Config format:

properties:

Replacements for property names in format { old_name: new_name }, for example { "left": "right" }

values:

Replacement patterns in format property_name: old_value_pattern = new_value_pattern

Value patterns are defined in format %i or using direct value.

For example:

float: left = right

This rule will convert float: left to float: right

Another, more sophisticated example:

box-shadow: %1 %2 inset = -%1 %2 inset

This rule will convert box-shadow: 1px 2px inset to box-shadow: -1px 2px inset

options:

You can also specify prefixes for properties and suffixes to values that will be ignored. For example, // is an IE hack that should be ignored when rules are applied, as well as \9 in the value end.