Dev Tools Snippet for getting all Media Queries on page

all_media_queries.js

var _pairs = function(obj) {
    var resArr = [];

    for (k in obj) {
        if(obj.hasOwnProperty(k)) {
            resArr.push([k, obj[k]]);
        }
    }

    return resArr;
};

var _getRules = function (styles) {
    var mq = {};

    for (var i = 0, max = styles.length; i < max; i++) {
        
        for (var j = 0, max2 = styles[i].rules.length; j < max2; j++) {
            var rule = styles[i].rules[j];
            
            if (rule.media) {
                mq[rule.media.mediaText] = 
                    mq[rule.media.mediaText] ? 
                    mq[rule.media.mediaText] + 1 :
                    1;
            }
        }
    }
    
    return mq;
};

var _displayResults = function (result) {
    for (var i = 0, max = result.length; i < max; i++) {
        console.log(result[i][0] + ' — ' + result[i][1]);
    }
};

_displayResults(
    _pairs(_getRules(document.styleSheets)).sort(function(a, b) {
        if (a[1] > b[1]) return -1;
        if (a[1] < b[1]) return 1;
        return 0;
    })
);