The importFrom option specifies sources where custom selectors can be imported from, which might be CSS, JS, and JSON files, functions, and directly passed objects.
Multiple sources can be passed into this option, and they will be parsed in the order they are received. JavaScript files, JSON files, functions, and objects will need to namespace custom selectors using the customProperties or custom-properties key.
The exportTo option specifies destinations where custom selectors can be exported to, which might be CSS, JS, and JSON files, functions, and directly passed objects.
Multiple destinations can be passed into this option, and they will be parsed in the order they are received. JavaScript files, JSON files, and objects will need to namespace custom selectors using the customProperties or custom-properties key.