From 02c87a85614e217b8e7b93753f315790ae9d99f6 Mon Sep 17 00:00:00 2001
From: Chris Swithinbank <swithinbank@gmail.com>
Date: Tue, 25 Jan 2022 01:25:05 +0100
Subject: [PATCH] fix(typings): ensure compatibility with TypeScript 3.x
 (#4259)

Labeled tuple elements were added in TypeScript 4.0.

Reference: https://www.typescriptlang.org/docs/handbook/release-notes/typescript-4-0.html#labeled-tuple-elements

Related: https://github.com/socketio/socket.io/commit/44e20ba5bfcb54f5bbe678fc1bf7f30bb9d90274
---
 lib/socket.ts | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/lib/socket.ts b/lib/socket.ts
index a5d738a810..e5e43dbd72 100644
--- a/lib/socket.ts
+++ b/lib/socket.ts
@@ -107,7 +107,10 @@ export interface Handshake {
   auth: { [key: string]: any };
 }
 
-export type Event = [eventName: string, ...args: any[]];
+/**
+ * `[eventName, ...args]`
+ */
+export type Event = [string, ...any[]];
 
 export class Socket<
   ListenEvents extends EventsMap = DefaultEventsMap,