judocss/judo.find.js

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

"use strict";

(function () {

    var findKeyCache = {};

    function _findKey(regMap, className) {

        className = className.replace(/--(small|medium|large|small-only|medium-only)\*?$/, "");

        var parts = className.split("-");

        if (parts.length <= 1) {
            return className;
        }

        var i = parts.length;
        var key = void 0;
        while (i--) {
            parts.pop();
            key = parts.join("-") + "-";
            if (regMap[key]) {
                return key;
            }
        }
    }

    function findKey(regMap, className) {
        findKeyCache[className] = findKeyCache[className] || _findKey(regMap, className);
        return findKeyCache[className];
    }

    var lookup = function lookup(className, classMap) {

        var key = findKey(classMap, className);
        var entries = classMap[key];

        if (entries) {
            var i = entries.length;
            while (i--) {
                var entry = entries[i];
                if (entry.regex.test(className)) {
                    return entry;
                }
            }
        }
    };

    module.exports = lookup;
})();