zulip-desktop/app/renderer/js/notification/default-notification.ts

import {ipcRenderer} from "electron";

import * as ConfigUtil from "../../../common/config-util";

import {focusCurrentServer} from "./helpers";

const NativeNotification = window.Notification;
export default class BaseNotification extends NativeNotification {
  constructor(title: string, options: NotificationOptions) {
    options.silent = true;
    super(title, options);

    this.addEventListener("click", () => {
      // Focus to the server who sent the
      // notification if not focused already
      focusCurrentServer();
      ipcRenderer.send("focus-app");
    });
  }

  static async requestPermission(): Promise<NotificationPermission> {
    return this.permission;
  }

  // Override default Notification permission
  static get permission(): NotificationPermission {
    return ConfigUtil.getConfigItem("showNotification") ? "granted" : "denied";
  }
}