app_vue2/plugins/sse.ts

import {Plugin} from "@nuxt/types";
import SseSource from "~/services/sse/sseSource";

/**
 * Setup SSE EventSource, allowing the app to listen for Mercure updates
 * @param ctx
 */
const ssePlugin: Plugin = ({ $config, store }) => {
  const sseSource = new SseSource($config.baseUrl_mercure, store.state.profile.access.id)

  sseSource.subscribe()
  window.addEventListener('beforeunload', () => { sseSource.unsubscribe() })
}

export default ssePlugin