Unable to close module dropdown of parent application on clicking anywhere in child application UI screen rendered in Ifaram

I am facing problem to close module dropdown on clicking anywhere in child application UI screen.
I am not be able to handle click Outside functionality for dropdown elements defined in Parent application after clicking on the IFrame which loads child application inside Parent application as I have an application built using Ember JS. Inside that I have another application plugin using IFrame created using React JS. I wanted to hide the rendered dropdown from the parent application by clicking inside the IFrame where the child application is presented.
Can anyone provide a solution to achieve it?

Is there a way to call an Ember Octane component method with parameters and have it return the text without implementing a helper?

On Ember Octane versions, how would I call a method in the component.js so that it simply returns the string value into the hbs template (without creating a helper)?

For example, I want for each item in the list, pass the index value as a parameter into the randomColorClass() method in order to generate a random number between 0 and index value. I understand I could implement a new helper for it, but is there a way to simply do it direct in the component.js?

The reason I'm hesitant to use a helper is because helpers are "global" naturally and this color class is unique to and defined in this component only.

Component.js

randomColorClass(max) {
  const rand = Math.random() * max;
  return `color-${Math.floor(rand)}`;
}

Template.hbs

  <div class=>
    Hi, my name is 
  </div>

Ember application runtime error uncaught referenceerror ember is not defined vendor.js

I'm trying to upgrade the ember from 3.* to 4.12.2. I'm not getting any compilation issues but when I run my application I'm getting "uncaught referenceerror ember is not defined" inside the vendor.js file.

Any help appreciated, Thank you in advance.

Regards

I tried removing deprecated libraries, tried using auto import still getting this same issue