dat.gui/elements/shim.js

// Use gui.shim.js in production when you want to use dat.gui to recall values without any of the interface.
( function( scope ) {
'use strict';

var Gui = function() {

    this.vars = {};

};

Gui.ready = function( fnc ) {

    fnc();

};

Gui.prototype.var = function( name, value ) {

    this.vars[ name ] = value;
    return controllerShim;

};

Gui.prototype.add = function( object, path ) {

    return controllerShim;

};

var identity = function() {
    return this;
};

var controllerShim = {
    on: identity
};

scope.Gui = Gui;

})( this );