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1 | 1 | # History
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2 | 2 |
|
3 |
| -## 2024 |
4 |
| - |
5 |
| -- [6.5.5](#655-2024-06-18) (Jun 2024) (from the [6.5.x](https://github.com/socketio/engine.io/tree/6.5.x) branch) |
6 |
| -- [3.6.2](#362-2024-06-18) (Jun 2024) (from the [3.x](https://github.com/socketio/engine.io/tree/3.x) branch) |
7 |
| - |
8 |
| -## 2023 |
9 |
| - |
10 |
| -- [6.5.4](#654-2023-11-09) (Nov 2023) |
11 |
| -- [6.5.3](#653-2023-10-06) (Oct 2023) |
12 |
| -- [6.5.2](#652-2023-08-01) (Aug 2023) |
13 |
| -- [6.5.1](#651-2023-06-27) (Jun 2023) |
14 |
| -- [6.5.0](#650-2023-06-16) (Jun 2023) |
15 |
| -- [6.4.2](#642-2023-05-02) (May 2023) |
16 |
| -- [6.4.1](#641-2023-02-20) (Feb 2023) |
17 |
| -- [6.4.0](#640-2023-02-06) (Feb 2023) |
18 |
| -- [6.3.1](#631-2023-01-12) (Jan 2023) |
19 |
| -- [6.3.0](#630-2023-01-10) (Jan 2023) |
20 |
| - |
21 |
| -## 2022 |
22 |
| - |
23 |
| -- [3.6.1](#361-2022-11-20) (Nov 2022) (from the [3.x](https://github.com/socketio/engine.io/tree/3.x) branch) |
24 |
| -- [6.2.1](#621-2022-11-20) (Nov 2022) |
25 |
| -- [3.6.0](#360-2022-06-06) (Jun 2022) (from the [3.x](https://github.com/socketio/engine.io/tree/3.x) branch) |
26 |
| -- [6.2.0](#620-2022-04-17) (Apr 2022) |
27 |
| -- [6.1.3](#613-2022-02-23) (Feb 2022) |
28 |
| -- [6.1.2](#612-2022-01-18) (Jan 2022) |
29 |
| -- [6.1.1](#611-2022-01-11) (Jan 2022) |
30 |
| - |
31 |
| -## 2021 |
32 |
| - |
33 |
| -- [6.1.0](#610-2021-11-08) (Nov 2021) |
34 |
| -- [6.0.1](#601-2021-11-06) (Nov 2021) |
35 |
| -- [**6.0.0**](#600-2021-10-08) (Oct 2021) |
36 |
| -- [5.2.0](#520-2021-08-29) (Aug 2021) |
37 |
| -- [5.1.1](#511-2021-05-16) (May 2021) |
38 |
| -- [5.1.0](#510-2021-05-04) (May 2021) |
39 |
| -- [**5.0.0**](#500-2021-03-10) (Mar 2021) |
40 |
| -- [4.1.1](#411-2021-02-02) (Feb 2021) |
41 |
| -- [4.1.0](#410-2021-01-14) (Jan 2021) |
42 |
| -- [4.0.6](#406-2021-01-04) (Jan 2021) |
43 |
| - |
44 |
| -## 2020 |
45 |
| - |
46 |
| -- [3.5.0](#350-2020-12-30) (Dec 2020) (from the [3.x](https://github.com/socketio/engine.io/tree/3.x) branch) |
47 |
| -- [4.0.5](#405-2020-12-07) (Dec 2020) |
48 |
| -- [4.0.4](#404-2020-11-17) (Nov 2020) |
49 |
| -- [4.0.3](#403-2020-11-17) (Nov 2020) |
50 |
| -- [4.0.2](#402-2020-11-09) (Nov 2020) |
51 |
| -- [4.0.1](#401-2020-10-21) (Oct 2020) |
52 |
| -- [**4.0.0**](#400-2020-09-10) (Sep 2020) |
53 |
| -- [3.4.2](#342-2020-06-04) (Jun 2020) |
54 |
| -- [3.4.1](#341-2020-04-17) (Apr 2020) |
55 |
| - |
| 3 | +| Version | Release date | |
| 4 | +|------------------------------------------------------------------------------------------------------|----------------| |
| 5 | +| [6.6.0](#660-2024-06-21) | June 2024 | |
| 6 | +| [6.5.5](#655-2024-06-18) (from the [6.5.x](https://github.com/socketio/engine.io/tree/6.5.x) branch) | June 2024 | |
| 7 | +| [3.6.2](#362-2024-06-18) (from the [3.x](https://github.com/socketio/engine.io/tree/3.x) branch) | June 2024 | |
| 8 | +| [6.5.4](#654-2023-11-09) | November 2023 | |
| 9 | +| [6.5.3](#653-2023-10-06) | October 2023 | |
| 10 | +| [6.5.2](#652-2023-08-01) | August 2023 | |
| 11 | +| [6.5.1](#651-2023-06-27) | June 2023 | |
| 12 | +| [6.5.0](#650-2023-06-16) | June 2023 | |
| 13 | +| [6.4.2](#642-2023-05-02) | May 2023 | |
| 14 | +| [6.4.1](#641-2023-02-20) | February 2023 | |
| 15 | +| [6.4.0](#640-2023-02-06) | February 2023 | |
| 16 | +| [6.3.1](#631-2023-01-12) | January 2023 | |
| 17 | +| [6.3.0](#630-2023-01-10) | January 2023 | |
| 18 | +| [3.6.1](#361-2022-11-20) (from the [3.x](https://github.com/socketio/engine.io/tree/3.x) branch) | November 2022 | |
| 19 | +| [6.2.1](#621-2022-11-20) | November 2022 | |
| 20 | +| [3.6.0](#360-2022-06-06) (from the [3.x](https://github.com/socketio/engine.io/tree/3.x) branch) | June 2022 | |
| 21 | +| [6.2.0](#620-2022-04-17) | April 2022 | |
| 22 | +| [6.1.3](#613-2022-02-23) | February 2022 | |
| 23 | +| [6.1.2](#612-2022-01-18) | January 2022 | |
| 24 | +| [6.1.1](#611-2022-01-11) | January 2021 | |
| 25 | +| [6.1.0](#610-2021-11-08) | November 2022 | |
| 26 | +| [6.0.1](#601-2021-11-06) | November 2021 | |
| 27 | +| [**6.0.0**](#600-2021-10-08) | October 2021 | |
| 28 | +| [5.2.0](#520-2021-08-29) | August 2021 | |
| 29 | +| [5.1.1](#511-2021-05-16) | May 2021 | |
| 30 | +| [5.1.0](#510-2021-05-04) | May 2021 | |
| 31 | +| [**5.0.0**](#500-2021-03-10) | March 2021 | |
| 32 | +| [4.1.1](#411-2021-02-02) | February 2021 | |
| 33 | +| [4.1.0](#410-2021-01-14) | January 2021 | |
| 34 | +| [4.0.6](#406-2021-01-04) | January 2021 | |
| 35 | +| [3.5.0](#350-2020-12-30) (from the [3.x](https://github.com/socketio/engine.io/tree/3.x) branch) | December 2020 | |
| 36 | +| [4.0.5](#405-2020-12-07) | December 2020 | |
| 37 | +| [4.0.4](#404-2020-11-17) | November 2020 | |
| 38 | +| [4.0.3](#403-2020-11-17) | November 2020 | |
| 39 | +| [4.0.2](#402-2020-11-09) | November 2020 | |
| 40 | +| [4.0.1](#401-2020-10-21) | October 2020 | |
| 41 | +| [**4.0.0**](#400-2020-09-10) | September 2020 | |
| 42 | +| [3.4.2](#342-2020-06-04) | June 2020 | |
| 43 | +| [3.4.1](#341-2020-04-17) | April 2020 | |
56 | 44 |
|
57 | 45 |
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58 | 46 | # Release notes
|
59 | 47 |
|
| 48 | +## [6.6.0](https://github.com/socketio/engine.io/compare/6.5.4...6.6.0) (2024-06-21) |
| 49 | + |
| 50 | + |
| 51 | +### Bug Fixes |
| 52 | + |
| 53 | +* fix `websocket` and `webtransport` send callbacks ([#699](https://github.com/socketio/engine.io/issues/699)) ([fc21c4a](https://github.com/socketio/engine.io/commit/fc21c4a05f9d50d7efd62aa7a937fadce385e919)) |
| 54 | +* properly call the send callback during upgrade ([362bc78](https://github.com/socketio/engine.io/commit/362bc78191c607e6b7c7f2b2e7e7ddb2fe53101c)) |
| 55 | +* **types:** make socket.request writable ([#697](https://github.com/socketio/engine.io/issues/697)) ([0efa04b](https://github.com/socketio/engine.io/commit/0efa04b5841816d18b0c6ebf7c5f592f8382978a)) |
| 56 | + |
| 57 | + |
| 58 | +### Performance Improvements |
| 59 | + |
| 60 | +* do not reset the hearbeat timer on each packet ([5359bae](https://github.com/socketio/engine.io/commit/5359bae683e2a25742bd4989d0355a8fc10d294e)) |
| 61 | +* **websocket:** use bound callbacks ([9a68c8c](https://github.com/socketio/engine.io/commit/9a68c8ce93cc1bc0bc1a30548558da49860f4acd)) |
| 62 | + |
| 63 | + |
| 64 | +### Dependencies |
| 65 | + |
| 66 | +- [`ws@~8.17.1`](https://github.com/websockets/ws/releases/tag/8.17.1) (no change) |
| 67 | + |
| 68 | + |
| 69 | + |
60 | 70 | ## [6.5.5](https://github.com/socketio/engine.io/compare/6.5.4...6.5.5) (2024-06-18)
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61 | 71 |
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62 | 72 | This release contains a bump of the `ws` dependency, which includes an important [security fix](https://github.com/websockets/ws/commit/e55e5106f10fcbaac37cfa89759e4cc0d073a52c).
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