How to expose a class to the global scope with esbuild?

Update

user @TKoL suggested defining a property in the window object. This produces the result I wanted to achieve, although I do not know if it is the correct way to proceed. I will be using this method for the time being. Thanks!

I am using esbuild in my project (first time using a bundler / developing JS in this "style"). The project is a small web component for which I developed a class that the end user should be able to utilize in their scripts.

// this is the component, which is then bundled and minified by esbuild.
// i have omitted various imports required in the class here.

export default class Widget extends HTMLElement {
    /// code here is not relevant
}

customElements.define('custom-widget', Widget);

As it stands, the end user is able to utilize the widget from HTML like this:

<custom-widget some-custom-attribute="some-value"></custom-widget>

let widget = document.querySelector('custom-widget');
widget.someMethodDefinedInTheClass();

However, I would like to allow the user to do it all via JavaScript as well.

How can I make esbuild expose the Widget class to the global scope? I'd like to do this to enable behaviours such as:

let wOptions = {}; // object of initialization options for the widget
let widget = new Widget(wOptions);
someContainer.append(widget);
widget.someMethodDefinedInTheClass();