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/*!
 * enquire.js v2.1.6 - Awesome Media Queries in JavaScript
 * Copyright (c) 2017 Nick Williams - http://wicky.nillia.ms/enquire.js
 * License: MIT */


(function(f){if(typeof exports==="object"&&typeof module!=="undefined"){module.exports=f()}else if(typeof define==="function"&&define.amd){define([],f)}else{var g;if(typeof window!=="undefined"){g=window}else if(typeof global!=="undefined"){g=global}else if(typeof self!=="undefined"){g=self}else{g=this}g.enquire = f()}})(function(){var define,module,exports;return (function e(t,n,r){function s(o,u){if(!n[o]){if(!t[o]){var a=typeof require=="function"&&require;if(!u&&a)return a(o,!0);if(i)return i(o,!0);var f=new Error("Cannot find module '"+o+"'");throw f.code="MODULE_NOT_FOUND",f}var l=n[o]={exports:{}};t[o][0].call(l.exports,function(e){var n=t[o][1][e];return s(n?n:e)},l,l.exports,e,t,n,r)}return n[o].exports}var i=typeof require=="function"&&require;for(var o=0;o<r.length;o++)s(r[o]);return s})({1:[function(require,module,exports){
var QueryHandler = require(3);
var each = require(4).each;

/**
 * Represents a single media query, manages it's state and registered handlers for this query
 *
 * @constructor
 * @param {string} query the media query string
 * @param {boolean} [isUnconditional=false] whether the media query should run regardless of whether the conditions are met. Primarily for helping older browsers deal with mobile-first design
 */
function MediaQuery(query, isUnconditional) {
    this.query = query;
    this.isUnconditional = isUnconditional;
    this.handlers = [];
    this.mql = window.matchMedia(query);

    var self = this;
    this.listener = function(mql) {
        // Chrome passes an MediaQueryListEvent object, while other browsers pass MediaQueryList directly
        self.mql = mql.currentTarget || mql;
        self.assess();
    };
    this.mql.addListener(this.listener);
}

MediaQuery.prototype = {

    constuctor : MediaQuery,

    /**
     * add a handler for this query, triggering if already active
     *
     * @param {object} handler
     * @param {function} handler.match callback for when query is activated
     * @param {function} [handler.unmatch] callback for when query is deactivated
     * @param {function} [handler.setup] callback for immediate execution when a query handler is registered
     * @param {boolean} [handler.deferSetup=false] should the setup callback be deferred until the first time the handler is matched?
     */
    addHandler : function(handler) {
        var qh = new QueryHandler(handler);
        this.handlers.push(qh);

        this.matches() && qh.on();
    },

    /**
     * removes the given handler from the collection, and calls it's destroy methods
     *
     * @param {object || function} handler the handler to remove
     */
    removeHandler : function(handler) {
        var handlers = this.handlers;
        each(handlers, function(h, i) {
            if(h.equals(handler)) {
                h.destroy();
                return !handlers.splice(i,1); //remove from array and exit each early
            }
        });
    },

    /**
     * Determine whether the media query should be considered a match
     *
     * @return {Boolean} true if media query can be considered a match, false otherwise
     */
    matches : function() {
        return this.mql.matches || this.isUnconditional;
    },

    /**
     * Clears all handlers and unbinds events
     */
    clear : function() {
        each(this.handlers, function(handler) {
            handler.destroy();
        });
        this.mql.removeListener(this.listener);
        this.handlers.length = 0; //clear array
    },

    /*
        * Assesses the query, turning on all handlers if it matches, turning them off if it doesn't match
        */
    assess : function() {
        var action = this.matches() ? 'on' : 'off';

        each(this.handlers, function(handler) {
            handler[action]();
        });
    }
};

module.exports = MediaQuery;

},{"3":3,"4":4}],2:[function(require,module,exports){
var MediaQuery = require(1);
var Util = require(4);
var each = Util.each;
var isFunction = Util.isFunction;
var isArray = Util.isArray;

/**
 * Allows for registration of query handlers.
 * Manages the query handler's state and is responsible for wiring up browser events
 *
 * @constructor
 */
function MediaQueryDispatch () {
    if(!window.matchMedia) {
        throw new Error('matchMedia not present, legacy browsers require a polyfill');
    }

    this.queries = {};
    this.browserIsIncapable = !window.matchMedia('only all').matches;
}

MediaQueryDispatch.prototype = {

    constructor : MediaQueryDispatch,

    /**
     * Registers a handler for the given media query
     *
     * @param {string} q the media query
     * @param {object || Array || Function} options either a single query handler object, a function, or an array of query handlers
     * @param {function} options.match fired when query matched
     * @param {function} [options.unmatch] fired when a query is no longer matched
     * @param {function} [options.setup] fired when handler first triggered
     * @param {boolean} [options.deferSetup=false] whether setup should be run immediately or deferred until query is first matched
     * @param {boolean} [shouldDegrade=false] whether this particular media query should always run on incapable browsers
     */
    register : function(q, options, shouldDegrade) {
        var queries         = this.queries,
            isUnconditional = shouldDegrade && this.browserIsIncapable;

        if(!queries[q]) {
            queries[q] = new MediaQuery(q, isUnconditional);
        }

        //normalise to object in an array
        if(isFunction(options)) {
            options = { match : options };
        }
        if(!isArray(options)) {
            options = [options];
        }
        each(options, function(handler) {
            if (isFunction(handler)) {
                handler = { match : handler };
            }
            queries[q].addHandler(handler);
        });

        return this;
    },

    /**
     * unregisters a query and all it's handlers, or a specific handler for a query
     *
     * @param {string} q the media query to target
     * @param {object || function} [handler] specific handler to unregister
     */
    unregister : function(q, handler) {
        var query = this.queries[q];

        if(query) {
            if(handler) {
                query.removeHandler(handler);
            }
            else {
                query.clear();
                delete this.queries[q];
            }
        }

        return this;
    }
};

module.exports = MediaQueryDispatch;

},{"1":1,"4":4}],3:[function(require,module,exports){
/**
 * Delegate to handle a media query being matched and unmatched.
 *
 * @param {object} options
 * @param {function} options.match callback for when the media query is matched
 * @param {function} [options.unmatch] callback for when the media query is unmatched
 * @param {function} [options.setup] one-time callback triggered the first time a query is matched
 * @param {boolean} [options.deferSetup=false] should the setup callback be run immediately, rather than first time query is matched?
 * @constructor
 */
function QueryHandler(options) {
    this.options = options;
    !options.deferSetup && this.setup();
}

QueryHandler.prototype = {

    constructor : QueryHandler,

    /**
     * coordinates setup of the handler
     *
     * @function
     */
    setup : function() {
        if(this.options.setup) {
            this.options.setup();
        }
        this.initialised = true;
    },

    /**
     * coordinates setup and triggering of the handler
     *
     * @function
     */
    on : function() {
        !this.initialised && this.setup();
        this.options.match && this.options.match();
    },

    /**
     * coordinates the unmatch event for the handler
     *
     * @function
     */
    off : function() {
        this.options.unmatch && this.options.unmatch();
    },

    /**
     * called when a handler is to be destroyed.
     * delegates to the destroy or unmatch callbacks, depending on availability.
     *
     * @function
     */
    destroy : function() {
        this.options.destroy ? this.options.destroy() : this.off();
    },

    /**
     * determines equality by reference.
     * if object is supplied compare options, if function, compare match callback
     *
     * @function
     * @param {object || function} [target] the target for comparison
     */
    equals : function(target) {
        return this.options === target || this.options.match === target;
    }

};

module.exports = QueryHandler;

},{}],4:[function(require,module,exports){
/**
 * Helper function for iterating over a collection
 *
 * @param collection
 * @param fn
 */
function each(collection, fn) {
    var i      = 0,
        length = collection.length,
        cont;

    for(i; i < length; i++) {
        cont = fn(collection[i], i);
        if(cont === false) {
            break; //allow early exit
        }
    }
}

/**
 * Helper function for determining whether target object is an array
 *
 * @param target the object under test
 * @return {Boolean} true if array, false otherwise
 */
function isArray(target) {
    return Object.prototype.toString.apply(target) === '[object Array]';
}

/**
 * Helper function for determining whether target object is a function
 *
 * @param target the object under test
 * @return {Boolean} true if function, false otherwise
 */
function isFunction(target) {
    return typeof target === 'function';
}

module.exports = {
    isFunction : isFunction,
    isArray : isArray,
    each : each
};

},{}],5:[function(require,module,exports){
var MediaQueryDispatch = require(2);
module.exports = new MediaQueryDispatch();

},{"2":2}]},{},[5])(5)
});