| 1 | ## [4.0.3](https://github.com/socketio/engine.io-parser/compare/4.0.2...4.0.3) (2021-08-29)
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| 2 |
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| 3 |
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| 4 | ### Bug Fixes
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| 5 |
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| 6 | * respect the offset and length of TypedArray objects ([6d7dd76](https://github.com/socketio/engine.io-parser/commit/6d7dd76130690afda6c214d5c04305d2bbc4eb4d))
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| 7 |
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| 8 |
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| 9 | ## [4.0.2](https://github.com/socketio/engine.io-parser/compare/4.0.1...4.0.2) (2020-12-07)
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| 10 |
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| 11 |
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| 12 | ### Bug Fixes
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| 13 |
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| 14 | * add base64-arraybuffer as prod dependency ([2ccdeb2](https://github.com/socketio/engine.io-parser/commit/2ccdeb277955bed8742a29f2dcbbf57ca95eb12a))
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| 15 |
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| 16 |
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| 17 | ## [2.2.1](https://github.com/socketio/engine.io-parser/compare/2.2.0...2.2.1) (2020-09-30)
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| 18 |
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| 19 |
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| 20 | ## [4.0.1](https://github.com/socketio/engine.io-parser/compare/4.0.0...4.0.1) (2020-09-10)
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| 21 |
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| 22 |
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| 23 | ### Bug Fixes
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| 24 |
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| 25 | * use a terser-compatible representation of the separator ([886f9ea](https://github.com/socketio/engine.io-parser/commit/886f9ea7c4e717573152c31320f6fb6c6664061b))
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| 26 |
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| 27 |
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| 28 | # [4.0.0](https://github.com/socketio/engine.io-parser/compare/v4.0.0-alpha.1...4.0.0) (2020-09-08)
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| 29 |
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| 30 | This major release contains the necessary changes for the version 4 of the Engine.IO protocol. More information about the new version can be found [there](https://github.com/socketio/engine.io-protocol#difference-between-v3-and-v4).
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| 31 |
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| 32 | Encoding changes between v3 and v4:
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| 33 |
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| 34 | - encodePacket with string
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| 35 | - input: `{ type: "message", data: "hello" }`
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| 36 | - output in v3: `"4hello"`
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| 37 | - output in v4: `"4hello"`
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| 38 |
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| 39 | - encodePacket with binary
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| 40 | - input: `{ type: 'message', data: <Buffer 01 02 03> }`
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| 41 | - output in v3: `<Buffer 04 01 02 03>`
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| 42 | - output in v4: `<Buffer 01 02 03>`
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| 43 |
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| 44 | - encodePayload with strings
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| 45 | - input: `[ { type: 'message', data: 'hello' }, { type: 'message', data: '€€€' } ]`
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| 46 | - output in v3: `"6:4hello4:4€€€"`
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| 47 | - output in v4: `"4hello\x1e4€€€"`
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| 48 |
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| 49 | - encodePayload with string and binary
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| 50 | - input: `[ { type: 'message', data: 'hello' }, { type: 'message', data: <Buffer 01 02 03> } ]`
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| 51 | - output in v3: `<Buffer 00 06 ff 34 68 65 6c 6c 6f 01 04 ff 04 01 02 03>`
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| 52 | - output in v4: `"4hello\x1ebAQID"`
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| 53 |
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| 54 | Please note that the parser is now dependency-free! This should help reduce the size of the browser bundle.
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| 55 |
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| 56 | ### Bug Fixes
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| 57 |
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| 58 | * keep track of the buffer initial length ([8edf2d1](https://github.com/socketio/engine.io-parser/commit/8edf2d1478026da442f519c2d2521af43ba01832))
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| 59 |
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| 60 |
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| 61 | ### Features
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| 62 |
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| 63 | * restore the upgrade mechanism ([6efedfa](https://github.com/socketio/engine.io-parser/commit/6efedfa0f3048506a4ba99e70674ddf4c0732e0c))
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| 64 |
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| 65 |
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| 66 |
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| 67 | # [4.0.0-alpha.1](https://github.com/socketio/engine.io-parser/compare/v4.0.0-alpha.0...v4.0.0-alpha.1) (2020-05-19)
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| 68 |
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| 69 |
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| 70 | ### Features
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| 71 |
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| 72 | * implement the version 4 of the protocol ([cab7db0](https://github.com/socketio/engine.io-parser/commit/cab7db0404e0a69f86a05ececd62c8c31f4d97d5))
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| 73 |
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| 74 |
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| 75 |
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| 76 | # [4.0.0-alpha.0](https://github.com/socketio/engine.io-parser/compare/2.2.0...v4.0.0-alpha.0) (2020-02-04)
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| 77 |
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| 78 |
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| 79 | ### Bug Fixes
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| 80 |
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| 81 | * properly decode binary packets ([5085373](https://github.com/socketio/engine.io-parser/commit/50853738e0c6c16f9cee0d7887651155f4b78240))
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| 82 |
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| 83 |
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| 84 | ### Features
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| 85 |
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| 86 | * remove packet type when encoding binary packets ([a947ae5](https://github.com/socketio/engine.io-parser/commit/a947ae59a2844e4041db58ff36b270d1528b3bee))
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| 87 |
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| 88 |
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| 89 | ### BREAKING CHANGES
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| 90 |
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| 91 | * the packet containing binary data will now be sent without any transformation
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| 92 |
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| 93 | Protocol v3: { type: 'message', data: <Buffer 01 02 03> } => <Buffer 04 01 02 03>
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| 94 | Protocol v4: { type: 'message', data: <Buffer 01 02 03> } => <Buffer 01 02 03>
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| 95 |
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| 96 |
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| 97 |
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| 98 | # [2.2.0](https://github.com/socketio/engine.io-parser/compare/2.1.3...2.2.0) (2019-09-13)
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| 99 |
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| 100 |
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| 101 | * [refactor] Use `Buffer.allocUnsafe` instead of `new Buffer` (#104) ([aedf8eb](https://github.com/socketio/engine.io-parser/commit/aedf8eb29e8bf6aeb5c6cc68965d986c4c958ae2)), closes [#104](https://github.com/socketio/engine.io-parser/issues/104)
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| 102 |
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| 103 |
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| 104 | ### BREAKING CHANGES
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| 105 |
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| 106 | * drop support for Node.js 4 (since Buffer.allocUnsafe was added in v5.10.0)
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| 107 |
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| 108 | Reference: https://nodejs.org/docs/latest/api/buffer.html#buffer_class_method_buffer_allocunsafe_size
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