JSONP-global.js

// Adds one JSONP global (for requireJS module, see JSONP.js)
var JSONP = (function (global) {
    // (C) WebReflection Essential - Mit Style
    // cleaned up by Brett Zamir for JSLint and avoiding additional globals and need for conventional [?&]callback= in URL)
    'use strict';
    var id = 0,
        ns = 'JSONP',
        prefix = '__JSONP__',
        document = global.document,
        documentElement = document.documentElement;
    return function (uri, callback) {
        var src = prefix + id++,
            script = document.createElement('script'),
            JSONPResponse = function () {
                try { delete global[ns][src]; } catch(e) { global[ns][src] = null; }
                documentElement.removeChild(script);
                callback.apply(this, arguments);
            };
        global[ns][src] = JSONPResponse;
        documentElement.insertBefore(
            script,
            documentElement.lastChild
        ).src = uri + (uri.indexOf('?') > -1 ? '&' : '?') + 'callback=' + ns + '.' + src;
    };
}(this));

JSONP.js

/*globals define */
define(function () {
    // (C) WebReflection Essential - Mit Style
    // cleaned up by Brett Zamir for JSLint and avoiding additional globals and need for conventional [?&]callback= in URL)
    'use strict';
    var id = 0,
        global = window,
        ns = 'require',
        prefix = '__JSONP__',
        document = global.document,
        documentElement = document.documentElement;
    return function (uri, callback) {
        var src = prefix + id++,
            script = document.createElement('script'),
            JSONPResponse = function () {
                try { delete global[ns][src]; } catch(e) { global[ns][src] = null; }
                documentElement.removeChild(script);
                callback.apply(this, arguments);
            };
        global[ns][src] = JSONPResponse;
        documentElement.insertBefore(
            script,
            documentElement.lastChild
        ).src = uri + (uri.indexOf('?') > -1 ? '&' : '?') + 'callback=' + ns + '.' + src;
    };
});

MediaWikiJSONP-global.js

/*globals JSONP */
(function () {'use strict';

function MediaWikiJSONP(opts, argObj, cb) {
    if (!(this instanceof MediaWikiJSONP)) {
        return new MediaWikiJSONP(opts, argObj, cb);
    }
    if (typeof opts === 'string') {
        this.baseURL = opts;
    }
    else {
        this.baseURL = opts.baseURL;
    }
    if (argObj) {
        this.send(argObj, cb);
    }
}
MediaWikiJSONP.prototype.send = function MediaWikiJSONP__send (argObj, cb) {
    cb = cb || function () {}; // Are there API calls with side effects?
    var uri, arg, args = '';
    for (arg in argObj) {
        if (argObj.hasOwnProperty(arg)) {
            args += '&' + arg + '=' + encodeURIComponent(argObj[arg]);
        }
    }
    uri = this.baseURL +  '/w/api.php?format=json' + args;
    JSONP(uri, cb);
};

// EXPORTS
this.MediaWikiJSONP = MediaWikiJSONP;
}());

MediaWikiJSONP.js

/*globals define */
define(['./JSONP'], function (JSONP) {
    'use strict';
    function MediaWikiJSONP(opts, argObj, cb) {
        if (!(this instanceof MediaWikiJSONP)) {
            return new MediaWikiJSONP(opts, argObj, cb);
        }
        if (typeof opts === 'string') {
            this.baseURL = opts;
        }
        else {
            this.baseURL = opts.baseURL;
        }
        if (argObj) {
            this.send(argObj, cb);
        }
    }
    MediaWikiJSONP.prototype.send = function MediaWikiJSONP__send (argObj, cb) {
        cb = cb || function () {}; // Are there API calls with side effects?
        var uri, arg, args = '';
        for (arg in argObj) {
            if (argObj.hasOwnProperty(arg)) {
                args += '&' + arg + '=' + encodeURIComponent(argObj[arg]);
            }
        }
        uri = this.baseURL +  '/w/api.php?format=json' + args;
        JSONP(uri, cb);
    };
    return MediaWikiJSONP;
});