chore(release): 3.5.6

Diff: 3.5.5...3.5.6

Author: darrachequesne

CHANGELOG.md

@@ -1,3 +1,12 @@
+## [3.5.6](https://github.com/socketio/engine.io-client/compare/3.5.5...3.5.6) (2025-12-19)
+
+
+### Bug Fixes
+
+*  use ES3 syntax ([ab89342](https://github.com/socketio/engine.io-client/commit/ab893425fef898896144f8940dfdf771261ecebd))
+
+
+
 ## [3.5.5](https://github.com/socketio/engine.io-client/compare/3.5.4...3.5.5) (2025-11-17)
 
 

engine.io.js

@@ -4543,7 +4543,7 @@ return /******/ (function(modules) { // webpackBootstrap
 
 	WS.prototype.doClose = function () {
 	  if (typeof this.ws !== 'undefined') {
-	    this.ws.onerror = () => {};
+	    this.ws.onerror = function () {};
 	    this.ws.close();
 	  }
 	};

package.json

@@ -2,7 +2,7 @@
   "name": "engine.io-client",
   "description": "Client for the realtime Engine",
   "license": "MIT",
-  "version": "3.5.5",
+  "version": "3.5.6",
   "main": "lib/index.js",
   "homepage": "https://github.com/socketio/engine.io-client",
   "contributors": [