@stimulus-library/controllers/dist/utility/presence_controller.js

A library of useful controllers for Stimulus

import { BaseController } from "@stimulus-library/utilities";
export class PresenceController extends BaseController {
    get name() {
        return this.hasNameValue ? this.nameValue : "";
    }
    get _addedEventName() {
        return [this.name, "presence", "added"].filter(el => !!el).join(":");
    }
    get _removedEventName() {
        return [this.name, "presence", "removed"].filter(el => !!el).join(":");
    }
    connect() {
        this.dispatchEvent(this.el, this._addedEventName);
    }
    disconnect() {
        this.dispatchEvent(this.el, this._removedEventName);
    }
}
PresenceController.values = { name: String };