Passing bootstrapped variables and JSON to require.js

What is the best practice for passing bootstrapped variables within the rendered page (i.e. JSON data or config variables) to require.js so they can be checked for an used by dependancies?

It looks like this could be done by checking the window object (i.e. window.bootstrapped_models but that does not seem very optimal.

app.html - example data within the HTML document

<script>
var config = {
    "isAdmin": true,
    "userId": 1
};
var bootstrapped_models = {
    "groups": [
        {
            "id": 1,
            "name": "Foo"
        },
        {
            "id": 2,
            "name": "Bar"
        }
    ]
}
</script>

app.js - example app using require()

require(['jquery', 'GroupCollection'], function($, GroupCollection) {

    // extend default config
    if (config) {
        $.extend(defaults, config);
    }

    // use bootstrapped JSON here
    var collection = new GroupCollection;
    if (bootstrapped_models.groups.length > 0) {
        collection.add(bootstrapped_models.groups);
    }

});