Basic JavaScript module pattern

MY_MODULE.js

/**
 * @name MY_MODULE
 * @author Jamie Smith
 * @description Basic JavaScript module template with config and state objects, and private and public functions
 */

const MY_MODULE = (function () {

    "use strict";

    const cfg = {
        foo: 'bar'
    };

    const state = {
        init: false
    };

    function init() {
        // ⋯
        console.log(this.Utils.helperFunction('Foo bar'));
        state.init = true;
    }

    function getState(property = null) {
        if (property)
            console.log(property, state[property]);
        else
            console.log(state);
    }

    function privateFnc() { }

    function publicFnc() {
        privateFnc();
    }

    return {
        init: init,
        getState: getState,
        publicFnc: publicFnc
    };
})();

// ⋯

// Sub-module (note that this sub-module's methods will be publicly callable)
MY_MODULE.Utils = (function () {

    "use strict";

    // Example helper function
    function helperFunction(value) {
        if (value)
            return `${value}-amended`;

        return null;
    }

    return {
        helperFunction: helperFunction
    };
})();

// ⋯

MY_MODULE.init();