https://www.bernstein.io/assets/controllers/ask_assistant_controller-94f5a228.js

1import { Controller } from "@hotwired/stimulus"
2
3// "Ask the assistant" — a button, anywhere on the site, that opens the chat panel.
4//
5// It dispatches an event and stops. It does not know where the panel is, whether one exists, or what
6// happens next: the widget is in the layout on every public page and listens for `chat:open` (see
7// chat_widget_controller#openPanel). A button that reached across the DOM to find the panel and poke at
8// its classes would be a second implementation of "open the chat", and the day the widget changed shape
9// it would be a broken one.
10//
11// Same shape as the home page's conversion prompt, which hands over a whole first message
12// (`chat:open-with`). One conversation, one place it lives, several doors into it.
13export default class extends Controller {
14  open(event) {
15    event.preventDefault()
16    window.dispatchEvent(new CustomEvent("chat:open"))
17  }
18}