rcs is short for rename css selectors
Having long CSS selectors, such as
main-menu__item--disabled, can increase the filesizes. With this
rcs-core it is easy to rename the selectors and therefore reduce the filesize. You can save around 20% of the filesize by just shorten the CSS selectors in the CSS files.
What does it do?
It basically just rename/minify all CSS selectors in all files. First the library has to be trained with selectors. Based on this data, the selectors can be renamed in all files. Here are some examples made with Bootstrap files.
$ npm install --save rcs-core
$ yarn add rcs-core