chore(release): socket.io-client@4.8.3

Diff: https://github.com/socketio/socket.io/compare/socket.io-client@4.8.2...socket.io-client@4.8.3

packages/engine.io-parser/test.js

@@ -1,12 +0,0 @@
-const parser = require('.');
-
-parser.encodePayload([
-  {
-    type: 'message',
-    data: '€',
-  },
-  {
-    type: 'message',
-    data: Buffer.from([1, 2, 3, 4]),
-  },
-], true, console.log);

packages/engine.io-parser/zuul.config.js

@@ -1,44 +0,0 @@
-"use strict";
-
-const browsers = require("socket.io-browsers");
-
-const zuulConfig = (module.exports = {
-  ui: "mocha-bdd",
-
-  // test on localhost by default
-  local: true,
-  open: true,
-
-  concurrency: 2, // ngrok only accepts two tunnels by default
-  // if browser does not sends output in 120s since last output:
-  // stop testing, something is wrong
-  browser_output_timeout: 120 * 1000,
-  browser_open_timeout: 60 * 4 * 1000,
-  // we want to be notified something is wrong asap, so no retry
-  browser_retries: 1,
-
-  browserify: [
-    {
-      plugin: ["tsify", {
-        target: "es5"
-      }],
-      transform: {
-        name: "babelify",
-        presets: ["@babel/preset-env"]
-      }
-    }
-  ]
-});
-
-if (process.env.CI === "true") {
-  zuulConfig.local = false;
-  zuulConfig.tunnel = {
-    type: "ngrok",
-    bind_tls: true
-  };
-}
-
-const isPullRequest =
-  process.env.TRAVIS_PULL_REQUEST &&
-  process.env.TRAVIS_PULL_REQUEST !== "false";
-zuulConfig.browsers = isPullRequest ? browsers.pullRequest : browsers.all;

packages/socket.io-client/CHANGELOG.md

@@ -2,7 +2,8 @@
 
 | Version                                                                                                     | Release date   | Bundle size (UMD min+gzip) |
 |-------------------------------------------------------------------------------------------------------------|----------------|----------------------------|
-| [4.8.2](#482-2025-12-22)                                                                                    | December 2024  | `14.4 KB`                  |
+| [4.8.3](#483-2025-12-23)                                                                                    | December 2025  | `14.4 KB`                  |
+| [4.8.2](#482-2025-12-22)                                                                                    | December 2025  | `14.4 KB`                  |
 | [4.8.1](#481-2024-10-25)                                                                                    | October 2024   | `14.4 KB`                  |
 | [4.8.0](#480-2024-09-21)                                                                                    | September 2024 | `14.4 KB`                  |
 | [4.7.5](#475-2024-03-14)                                                                                    | March 2024     | `14.6 KB`                  |
@@ -51,6 +52,18 @@
 | [2.1.0](#210-2018-03-29)                                                                                    | March 2018     | `18.7 KB`                  |
 
 
+## [4.8.3](https://github.com/socketio/socket.io/compare/socket.io-client@4.8.2...socket.io-client@4.8.3) (2025-12-23)
+
+There were some minor bug fixes on the server side, which mandate a client bump.
+
+
+### Dependencies
+
+- [`engine.io-client@~6.6.1`](https://github.com/socketio/engine.io-client/releases/tag/6.5.2) (no change)
+- [`ws@~8.18.3`](https://github.com/websockets/ws/releases/tag/8.18.3) ([diff](https://github.com/websockets/ws/compare/8.17.1...8.18.3))
+
+
+
 ## [4.8.2](https://github.com/socketio/socket.io/compare/socket.io-client@4.8.1...socket.io-client@4.8.2) (2025-12-22)
 
 

packages/socket.io-client/dist/socket.io.esm.min.js

@@ -1,5 +1,5 @@
 /*!
- * Socket.IO v4.8.2
+ * Socket.IO v4.8.3
  * (c) 2014-2025 Guillermo Rauch
  * Released under the MIT License.
  */

packages/socket.io-client/dist/socket.io.js

@@ -1,5 +1,5 @@
 /*!
- * Socket.IO v4.8.2
+ * Socket.IO v4.8.3
  * (c) 2014-2025 Guillermo Rauch
  * Released under the MIT License.
  */

packages/socket.io-client/dist/socket.io.min.js

@@ -1,5 +1,5 @@
 /*!
- * Socket.IO v4.8.2
+ * Socket.IO v4.8.3
  * (c) 2014-2025 Guillermo Rauch
  * Released under the MIT License.
  */

packages/socket.io-client/dist/socket.io.msgpack.min.js

@@ -1,5 +1,5 @@
 /*!
- * Socket.IO v4.8.2
+ * Socket.IO v4.8.3
  * (c) 2014-2025 Guillermo Rauch
  * Released under the MIT License.
  */

packages/socket.io-client/package.json

@@ -1,6 +1,6 @@
 {
   "name": "socket.io-client",
-  "version": "4.8.2",
+  "version": "4.8.3",
   "description": "Realtime application framework client",
   "keywords": [
     "realtime",

packages/socket.io-client/support/package.esm.json

@@ -1,5 +1,5 @@
 {
   "name": "socket.io-client",
-  "version": "4.8.2",
+  "version": "4.8.3",
   "type": "module"
 }

packages/socket.io/lib/index.ts

@@ -831,14 +831,13 @@ export class Server<
     restoreAdapter();
 
     if (this.httpServer) {
-      await new Promise<void>((resolve, reject) => {
+      return new Promise<void>((resolve) => {
         this.httpServer.close((err) => {
           fn && fn(err);
           if (err) {
-            reject(err);
+            debug("server was not running");
-          } else {
-            resolve();
           }
+          resolve();
         });
       });
     } else {

packages/socket.io/test/close.ts

@@ -70,6 +70,27 @@ describe("close", () => {
     });
   });
 
+  it("should not throw when the underlying HTTP server is not running (callback)", (done) => {
+    const httpServer = createServer();
+    const io = new Server(httpServer);
+
+    io.close((err) => {
+      expect((err as Error & { code: string }).code).to.eql(
+        "ERR_SERVER_NOT_RUNNING",
+      );
+      done();
+    });
+  });
+
+  it("should not throw when the underlying HTTP server is not running (Promise)", (done) => {
+    const httpServer = createServer();
+    const io = new Server(httpServer);
+
+    io.close()
+      .then(() => done())
+      .catch((e) => done(e));
+  });
+
   describe("graceful close", () => {
     function fixture(filename) {
       return (