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
fix(sio): do not throw when calling io.close() on a stopped server
2026-01-11 16:08:24 -05:00 · 2025-12-23 17:36:53 +01:00 · 2025-12-23 17:30:15 +01:00
9 changed files with 44 additions and 11 deletions
--- a/packages/socket.io-client/CHANGELOG.md
+++ b/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)


--- a/packages/socket.io-client/dist/socket.io.esm.min.js
+++ b/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.
 */
--- a/packages/socket.io-client/dist/socket.io.js
+++ b/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.
 */
--- a/packages/socket.io-client/dist/socket.io.min.js
+++ b/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.
 */
--- a/packages/socket.io-client/dist/socket.io.msgpack.min.js
+++ b/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.
 */
--- a/packages/socket.io-client/package.json
+++ b/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",
--- a/packages/socket.io-client/support/package.esm.json
+++ b/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"
 }
--- a/packages/socket.io/lib/index.ts
+++ b/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);
-          } else {
-            resolve();
+            debug("server was not running");
          }
+          resolve();
        });
      });
    } else {
--- a/packages/socket.io/test/close.ts
+++ b/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 (