A Node.js utility app for converting rules in css files from rem units to px. While rems is the preferred method when styling, sometimes it is necesary to convert a vendor css file over so that it plays nicely within a larger site which may have different rem values.

1. Run $ npm install
2. Place any css files to convert, into the input-css folder
3. Run $ npm run start
4. All converted filed will be placed into the output-css folder.

Type: Object | Null
Default:

{
    rootValue: 16,
    unitPrecision: 5,
    propList: ['font', 'font-size', 'line-height', 'letter-spacing'],
    selectorBlackList: [],
    replace: true,
    mediaQuery: false,
    minRemValue: 0
}

• rootValue (Number) The root element font size.
• unitPrecision (Number) The decimal precision px units are allowed to use, floored (rounding down on half).
• propList (Array) The properties that can change from rem to px.
  • Values need to be exact matches.
  • Use wildcard * to enable all properties. Example: ['*']
  • Use * at the start or end of a word. (['*position*'] will match background-position-y)
  • Use ! to not match a property. Example: ['*', '!letter-spacing']
  • Combine the "not" prefix with the other prefixes. Example: ['*', '!font*']
• selectorBlackList (Array) The selectors to ignore and leave as rem.
  • If value is string, it checks to see if selector contains the string.
    • ['body'] will match .body-class
  • If value is regexp, it checks to see if the selector matches the regexp.
    • [/^body$/] will match body but not .body
• replace (Boolean) replaces rules containing rems instead of adding fallbacks.
• mediaQuery (Boolean) Allow rem to be converted in media queries.
• minRemValue (Number) Set the minimum rem value to replace.