jquery access an instance object from other script

I have two script:
scipt1.js:

(function ($) {
‘use strict’;

var A = function (element, options) {
    this.element = $(element);
 
};

A.prototype.update = function update() {}
   
$.fn.doA = function (option) {
    return this.each(function test() {
            newA = new A(this, options);
        }

       
    });
};

}(jQuery));

And scipt2.js from incline html:

    $( document ).ready(function(){
                    $('#$this->id').doA($javascriptParameterString);
                    });    

In $( document ).ready(function().. from script2.js, I want to call the function update from scipt1.js after doA executed. Is there anyway I can reference the instance newA and call that function update?