judocss/judo.classRegex.js

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

"use strict";

(function () {

  var byAscendingLength = function byAscendingLength(a, b) {
    return a.length - b.length;
  };

  var replaceDollarVarsWithCapturingGroups = function 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;
  };

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

  var classRegex = function 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;
})();