Method _closeServer

server.js:865–880

(server)

  // Helper for promisifying close methods with callbacks, like http.Server or ws.WebSocketServer.
  async _closeServer(server) {
    return new Promise((resolve, reject) => {
      server.close(err => {
        if (err) {
          reject(err);
        }
        resolve();
      });

      // Note: this method won’t exist for updateServer
      if("closeAllConnections" in server) {
        // Node 18.2+
        server.closeAllConnections();
      }
    });
  }

  async close() {
    // Prevent multiple invocations.