judocss/src/judo.classRegex.js

The functional CSS toolkit designed for minimal effort and maximum efficiency.

(function(){

  const byAscendingLength = (a, b) => a.length - b.length;

  const replaceDollarVarsWithCapturingGroups = (str, dollarVars) => {

    var capture = "([A-Za-z0-9%#.\-]+)"
    var i = dollarVars.length

    dollarVars.sort(byAscendingLength)

    while(i--) {
      str = str.replace(dollarVars[i], capture)
    }

    return str
  }

  const queryModifierCapture = "(?:--(?:small|medium|large|small-only|medium-only))?"

  const classRegex = (str) => {

    var dollarVars = str.match(/(\$([A-Za-z0-9]+)[^\-\_]?)/g)

    if(dollarVars){
      str = replaceDollarVarsWithCapturingGroups(str, dollarVars)
    }

    return new RegExp('^'+str+queryModifierCapture+"(?:\\*)?"+'$')
  }

  module.exports = classRegex

})()