(function(doc)()

in website/content/js/head.js [37:181]

• 38 lines of code
• 14 McCabe index (conditional complexity)

(function(doc) {

    var html = doc.documentElement,
         conf = {
            screens: [320, 480, 640, 768, 1024, 1280, 1440, 1680, 1920],
            section: "-section",
            page: "-page",
            head: "head"
         },
         klass = [];


    if (window.head_conf) {
        for (var key in head_conf) {
            if (head_conf[key] !== undefined) {
                conf[key] = head_conf[key];
            }
        }
    }

    function pushClass(name) {
        klass[klass.length] = name;
    }

    function removeClass(name) {
        var re = new RegExp("\\b" + name + "\\b");
        html.className = html.className.replace(re, '');
    }

    function each(arr, fn) {
        for (var i = 0, arr_length = arr.length; i < arr_length; i++) {
            fn.call(arr, arr[i], i);
        }
    }

    // API
    var api = window[conf.head] = function() {
        api.ready.apply(null, arguments);
    };

    api.feature = function(key, enabled, queue) {

        // internal: apply all classes
        if (!key) {
            html.className += ' ' + klass.join( ' ' );
            klass = [];
            return;
        }

        if (Object.prototype.toString.call(enabled) == '[object Function]') {
            enabled = enabled.call();
        }

        pushClass((enabled ? '' : 'no-') + key);
        api[key] = !!enabled;

        // apply class to HTML element
        if (!queue) {
            removeClass('no-' + key);
            removeClass(key);
            api.feature();
        }

        return api;
    };

    // browser type & version
    var ua = navigator.userAgent.toLowerCase();

    ua = /(webkit)[ \/]([\w.]+)/.exec( ua ) ||
        /(opera)(?:.*version)?[ \/]([\w.]+)/.exec( ua ) ||
        /(msie) ([\w.]+)/.exec( ua ) ||
        !/compatible/.test( ua ) && /(mozilla)(?:.*? rv:([\w.]+))?/.exec( ua ) || [];


    if (ua[1] == 'msie') {
        ua[1] = 'ie';
        ua[2] = document.documentMode || ua[2];
    }

    pushClass(ua[1]);

    api.browser = { version: ua[2] };
    api.browser[ua[1]] = true;

    // IE specific
    if (api.browser.ie) {

        pushClass("ie" + parseFloat(ua[2]));

        // IE versions
        for (var ver = 3; ver < 11; ver++) {
            if (parseFloat(ua[2]) < ver) { pushClass("lt-ie" + ver); }
        }

        // HTML5 support
        each("abbr|article|aside|audio|canvas|details|figcaption|figure|footer|header|hgroup|mark|meter|nav|output|progress|section|summary|time|video".split("|"), function(el) {
            doc.createElement(el);
        });
                
    }
    

    // CSS "router"
    each(location.pathname.split("/"), function(el, i) {

        if (this.length > 2 && this[i + 1] !== undefined) {
            if (i) { pushClass(this.slice(1, i+1).join("-") + conf.section); }

        } else {

            // pageId
            var id = el || "index", index = id.indexOf(".");
            if (index > 0) { id = id.substring(0, index); }
            html.id = id + conf.page;

            // on root?
            if (!i) { pushClass("root" + conf.section); }
      }
    });


    // screen resolution: w-100, lt-480, lt-1024 ...
    function screenSize() {
        var w = window.outerWidth || html.clientWidth;

        // remove earlier widths
        html.className = html.className.replace(/ (w|lt)-\d+/g, "");

        // add new ones
        pushClass("w-" + Math.round(w / 100) * 100);

        each(conf.screens, function(width) {
            if (w <= width) { pushClass("lt-" + width); }
        });

        api.feature();
    }

    screenSize();
    window.onresize = screenSize;

    api.feature("js", true).feature();

})(document);