define(function() {
// Configuration of RequireJS
    requirejs.config({
        // No module can start with require. This can potentially allow easier definition of some elements
        enforceDefine : true,

        map : {
            '*': {
                'jquery': 'libs/jquery',
            },

            // To make jquery work with requireJS: see http://requirejs.org/docs/jquery.html
            // 'jquery' wants the real jQuery module
            // though. If this line was not here, there would
            // be an unresolvable cyclic dependency.
            'libs/jquery': { 'jquery': 'jquery' },
        },

        // The base URL is just the top-level directory where the files are stored
        baseUrl : './',

        // Kick-start the application by loading these files
        deps : [ 'MyMainPanel' ],
    });
});

define(['jquery'], function (jq) {
    return jq.noConflict( true );
});

...
<dependency>
    <groupId>org.webjars</groupId>
    <artifactId>jquery</artifactId>
    <version>${jquery.version}</version>
</dependency>
...

GET http://localhost:8080/jquery.js 404 (Not Found)
require.js:166 Uncaught Error: Script error for: jquery
http://requirejs.org/docs/errors.html#scripterror

define(['ractive',
        'jquery',
        function(Ractive,
                $,
){
    var Panel  = Ractive.extend({
        el:"mainPanel",

        oninit: function(){
            $.ajax({url: "/myURL"}).done(function(types){
                // Work
            })
        }
    })

    return Panel
})