From f9c16f226512fc8a8df461e3a07e392720462165 Mon Sep 17 00:00:00 2001
From: Damien Arrachequesne <damien.arrachequesne@gmail.com>
Date: Tue, 2 Jan 2024 15:55:56 +0100
Subject: [PATCH] fix(typings): fix the type of the socket#id attribute

Related: https://github.com/socketio/socket.io/issues/4884
---
 lib/socket.ts | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/lib/socket.ts b/lib/socket.ts
index 8a992e10..532a7423 100644
--- a/lib/socket.ts
+++ b/lib/socket.ts
@@ -151,7 +151,7 @@ export class Socket<
   public readonly io: Manager<ListenEvents, EmitEvents>;
 
   /**
-   * A unique identifier for the session.
+   * A unique identifier for the session. `undefined` when the socket is not connected.
    *
    * @example
    * const socket = io();
@@ -162,7 +162,7 @@ export class Socket<
    *   console.log(socket.id); // "G5p5..."
    * });
    */
-  public id: string;
+  public id: string | undefined;
 
   /**
    * The session ID used for connection state recovery, which must not be shared (unlike {@link id}).