--- title: Ditto v4 for JavaScript slug: v4-4/CE6-VxN0wJ15pl31zuuXY docTags: createdAt: 2023-08-22T18:59:12.457Z --- `javascript` `updates` `version` `changelog` # JavaScript Version 4.4.5 :::Changelog{title="Released: Fri Nov 17, 2023"} ::ChangelogItem{type="added" description="SDK version/language/platform and device name are now included in the small peer info document. (#10515)"} ::: # JavaScript Version 4.4.4 :::Changelog{title="Released: Thur Nov 2, 2023"} ::ChangelogItem{type="improved" description="Runtime validation of corrupted attachments being inserted into documents (#10552)"} ::ChangelogItem{type="fixed" description="An issue introduced in 4.4.2 where the Small Peer Info attachments were not replicated to the Portal. (#10538)"} ::ChangelogItem{type="added" description="The smallPeerInfo property to Ditto allowing to configure the collection and sync of Small Peer Info. (#10525)"} ::: # JavaScript Version 4.4.2 :::Changelog ::ChangelogItem{type="fixed" description="Small Peer info collection now defaults to localPeerOnly, preventing data from being collected on the Big Peer until the feature is explicitly enabled and sync scope is set to bigPeerOnly. (#10203, #10204)"} ::: # JavaScript Version 4.4.1 :::Changelog ::ChangelogItem{type="fixed" description="Persistence directories on Windows are now automatically normalized to prevent Windows' restrictions on path lenghts from causing disk access failure. (#9980)"} ::ChangelogItem{type="fixed" description="Configuring Ditto with a persistence directory that is not readable or writable now shows an error message and aborts initialization. (#9833)"} ::: # JavaScript Version 4.4.0 :::hint{type="warning"} ⚠️ **Deprecated** - `hash()` and `hashMnemonic()` methods on live query events were deprecated. Use the methods with the same name on the Document class instead. (#9661, #9610) ::: :::Changelog ::ChangelogItem{type="added" description="More informative log message for query failures caused by database access errors. (#9364)"} ::ChangelogItem{type="added" description="Small peers now persist structured log data to disk for later retrieval, with limits on the resulting disk usage. (#9547)"} ::ChangelogItem{type="added" description="More informative log message for query failures caused by database access errors. (#9364)"} ::ChangelogItem{type="improved" description="Print some internal errors in a more human-readable format. (#9269)"} ::ChangelogItem{type="improved" description="TransportConfig and its associated types can be serialized/deserialized into/from JSON and CBOR. (#9585)"} ::ChangelogItem{type="improved" description="Sets a minimum session refresh period. The small peer will always try to start refreshing its session after 3 days no matter how long the session period issue. Previously the small peer would start to refresh after half of the session length had elapsed. (#9594, #9645)"} ::ChangelogItem{type="improved" description="Initial replication time by reducing one roundtrip of messages before peers can sync. (#9404)"} ::ChangelogItem{type="improved" description="Attachment fetch time in several edge case scenarios. (#9501)"} ::ChangelogItem{type="improved" description="Efficiency by using less system resources when connected to peers but no replication changes are needing to be sent. (#9479, #7995)"} ::ChangelogItem{type="improved" description="Significantly reduced startup resource consumption linked to total document count. (#9501)"} ::ChangelogItem{type="fixed" description="A scenario where a peer could incorrectly receive data back from other peers even after they had modified their subscription and evicted the old data. (#9404)"} ::ChangelogItem{type="fixed" description="An issue where unusually high replication write load in large meshes could block all readers from reading the database. (#9395, #8872)"} ::ChangelogItem{type="fixed" description="The Connection type definition, which had previously contained a field named type that is now correctly defined with the name connectionType. (#9432)"} ::ChangelogItem{type="fixed" description="The Address type definition, which had previously defined the siteId field to be of type string and has now been updated to define it with the correct number | BigInt type. (#9432)"} ::: # JavaScript Version 4.3.1 Released: Thu Aug 10th 2023, 2:22 pm Release Notes: - Changed: Improved clarity of error messages when data on disk cannot be read by this version following a downgrade from a newer version of Ditto. (#9267) - Changed: Print some internal errors in a more human-readable format. (#9495) - Fixed: the  - Fixed: the  - Fixed: an issue on Linux that caused excessive multicast traffic over LAN transport. (#9398) Installation: :::BlockQuote npm install --save @dittolive/ditto\@4.3.1 ::: If you have yarn: :::BlockQuote yarn add @dittolive/ditto\@4.3.1 ::: [API Reference URL](https://software.ditto.live/js/Ditto/4.3.1/api-reference/) # JavaScript Version 4.3.0 Released: Tue Jul 18th 2023, 10:02 pm Release Notes: ⚠️ Warning: This SDK version will migrate some data formats on disk. Once upgraded to 4.3.0, an SDK can only be downgraded back to 4.2.2 and 4.2.1 but no earlier. Downgrading to versions earlier than 4.2.1 will require uninstalling and re-installing to clear out the new data formats. (#8946) - Added: - Added: - Added: An internal ability to measure & report the level of redundancy in replication updates to calculate the percentage of updates that are arriving from multiple peers. This will be used for future self-balancing mesh actions which are not yet enabled. (#8937) - Changed: new serialization format improves efficiency of replication, particularly in the Big Peer. (#8946) - Changed: Better logging for diagnosing auth failures. (#8984) - Changed: Improved replication performance by introducing a small internal caching layer for commonly computed values. (#8777) - Deprecated: - Fixed: The replication engine can now recover from certain filesystem corruption issues during sync instead of panicking. (#8965) - Fixed: Increased validation of document updates, preventing updates that try to modify the document id. (#9063) Installation: :::BlockQuote npm install --save @dittolive/ditto\@4.3.0 ::: If you have yarn: :::BlockQuote yarn add @dittolive/ditto\@4.3.0 ::: [API Reference URL](https://software.ditto.live/js/Ditto/4.3.0/api-reference/) # JavaScript Version 4.2.3 Released: Wed Jul 5th 2023, 3:32 pm Release Notes: - Synchronized version bump release Installation: :::BlockQuote npm install --save @dittolive/ditto\@4.2.3 ::: If you have yarn: :::BlockQuote yarn add @dittolive/ditto\@4.2.3 ::: [API Reference URL](https://software.ditto.live/js/Ditto/4.2.3/api-reference/) # JavaScript Version 4.2.2 Released: Tue Jul 4th 2023, 10:42 am Release Notes: - Improved mesh performance when using 50+ Small Peer devices (#9077) - Changed: Improved deserialization performance of Documents. (#9123) - Fixed: Increased validation of document updates, preventing updates that try to modify the document id. (#9129) - Fixed: Removed outdated ERROR level log statements in Ditto store related to - Fixed: The - Fixed: a potential crash if a document attachment was malformed (#9045) Installation: :::BlockQuote npm install --save @dittolive/ditto\@4.2.2 ::: If you have yarn: :::BlockQuote yarn add @dittolive/ditto\@4.2.2 ::: [API Reference URL](https://software.ditto.live/js/Ditto/4.2.2/api-reference/) # JavaScript Version 4.2.1 Released: Tue Jun 13th 2023, 3:47 pm Release Notes: - Fixed: a possible crash due to serialisation when upgrading from version 4.1.0 or 4.1.1 (#8925) Installation: :::BlockQuote npm install --save @dittolive/ditto\@4.2.1 ::: If you have yarn: :::BlockQuote yarn add @dittolive/ditto\@4.2.1 ::: [API Reference URL](https://software.ditto.live/js/Ditto/4.2.1/api-reference/) # JavaScript Version 4.2.0 Released: Tue Jun 13th 2023, 1:53 am Release Notes: - Added: - Changed: Automatically disables deadlock detection when running Ditto in a Node.js process that has the Inspector enabled with a command line parameter. (#8601) - Changed: Improved replication uses compressed message stream to decrease bandwidth consumption. (#8807) - Changed: Reduce verbosity in replication logs (#8370) - Fixed: Potential crash on Linux when handling Bluetooth advertisement during Ditto startup (#8538) Installation: :::BlockQuote npm install --save @dittolive/ditto\@4.2.0 ::: If you have yarn: :::BlockQuote yarn add @dittolive/ditto\@4.2.0 ::: [API Reference URL](https://software.ditto.live/js/Ditto/4.2.0/api-reference/) # JavaScript Version 4.1.1 Released: Thu May 18th 2023, 11:35 pm Release Notes: - Fixed: Devices with hostnames longer than 35 bytes will no longer fail to sync over LAN. - Fixed: Potential crash on Linux when handling Bluetooth advertisement during Ditto startup. - Added: - Changed: Automatically disables deadlock detection when running Ditto in a Node.js process that has the Inspector enabled with a command line parameter. - Changed: Improved the error message shown when attempting to write unsupported non-finite float values to documents. Installation: :::BlockQuote npm install --save @dittolive/ditto\@4.1.1 ::: If you have yarn: :::BlockQuote yarn add @dittolive/ditto\@4.1.1 ::: [API Reference URL](https://software.ditto.live/js/Ditto/4.1.1/api-reference/) # JavaScript Version 4.1.0 Released: Fri Apr 28th 2023, 11:52 am Release Notes: - Added: - Added: - Changed: the Bluetooth LE transport is now enabled by default on Linux when running on Node.js. Previously, it needed to be enabled by a developer using  - Changed: - Changed: (Experimental) Query Overlap Groups, Bus: a breaking protocol change for upcoming improvements. Peers using older versions will not be able to connect with newer peers until they upgrade. - Fixed: A replication issue where certain cases that should have reset the replication session with a remote peer would instead temporarily terminate the connection while not resetting the session. - Fixed: A replication issue that could cause failed convergence on small number of documents if updates are being received during a local eviction. - Security: Enforce immediate disconnection of any connected peers whose certificate expires during a sync session. - Fixed: Improved Bluetooth LE connection reliability on Linux - Fixed: (Wasm) Removed unsupported usage of - Fixed: P2P transports were disabled by default for the JS SDK, while enabled for all other SDKs. Fixed by enabling all P2P transports, that are available in the current environment (i.e. on Node/Electron running on macOS, no P2P transports when running in the browser). Installation: :::BlockQuote npm install --save @dittolive/ditto\@4.1.0 ::: If you have yarn: :::BlockQuote yarn add @dittolive/ditto\@4.1.0 ::: [API Reference URL](https://software.ditto.live/js/Ditto/4.1.0/api-reference/) # JavaScript Version 4.0.3-alpha.linux-ble-fixes-2 Released: Tue Apr 18th 2023, 1:22 am Release Notes: - Improvements to Bluetooth connection reliability on Linux Installation: :::BlockQuote npm install --save @dittolive/ditto\@4.0.3-alpha.linux-ble-fixes-2 ::: If you have yarn: :::BlockQuote yarn add @dittolive/ditto\@4.0.3-alpha.linux-ble-fixes-2 ::: [API Reference URL](https://software.ditto.live/js/Ditto/4.0.3-alpha.linux-ble-fixes-2/api-reference/) # JavaScript Version 4.0.3-alpha.linux-ble-fixes :::BlockQuote Released: Mon Apr 17th 2023, 3:19 pm ::: Release Notes: - Fixed: a replication issue that could cause failed convergence on small number of documents if updates are being received during a local eviction. - Improvements to Bluetooth connection reliability on Linux Installation: :::BlockQuote npm install --save @dittolive/ditto\@4.0.3-alpha.linux-ble-fixes ::: If you have yarn: :::BlockQuote yarn add @dittolive/ditto\@4.0.3-alpha.linux-ble-fixes ::: [API Reference URL](https://software.ditto.live/js/Ditto/4.0.3-alpha.linux-ble-fixes/api-reference/) # JavaScript Version 4.0.2 Released: Thu Apr 20th 2023, 3:36 pm Release Notes: - Fixed: A replication issue where certain cases that should have reset the replication session with a remote peer would instead temporarily terminate the connection while not resetting the session. - Fixed: Correct handling of reset and disable errors from receive\_update Installation: :::BlockQuote npm install --save @dittolive/ditto\@4.0.2 ::: If you have yarn: :::BlockQuote yarn add @dittolive/ditto\@4.0.2 ::: [API Reference URL](https://software.ditto.live/js/Ditto/4.0.2/api-reference/) # JavaScript Version 4.0.1 Released: Thu Apr 6th 2023, 11:54 am Release Notes: - Fixed: Resolved an issue with logging when the stdout is not available. Installation: :::BlockQuote npm install --save @dittolive/ditto\@4.0.1 ::: If you have yarn: :::BlockQuote yarn add @dittolive/ditto\@4.0.1 ::: [API Reference URL](https://software.ditto.live/js/Ditto/4.0.1/api-reference/) # JavaScript Version 4.0.0 Released: Wed Mar 22nd 2023, 3:48 pm Release Notes: - Added: AddWins removes will now be used if - Added: transaction support, which can be accessed through the Ditto store's  - Added: static method  - Changed: If a problem occurs with an app's authentication webhook, the Small Peer that is trying to authenticate will log more detailed information for the developer. - Changed: old multi-hop connections are now automatically disconnected when direct connections are established with peers, freeing up unneeded resources faster. - Changed: reduced severity level for some routine log statements which were previously emitted at a WARN level. - Changed: the  - Fixed: some threads spawned by the SDK no longer wait up to 30 seconds before being stopped. - Fixed: an issue which could cause Ditto to hang if more than 500 peers were encountered. - Fixed: replication hanging under some circumstances, especially WebSocket connections to Big Peer - Fixed: a possible crash if Ditto is configured with an invalid App ID. An error message is emitted instead. - Fixed: when enabling a P2P transport that is not available in an environment, Installation: :::BlockQuote npm install --save @dittolive/ditto\@4.0.0 ::: If you have yarn: :::BlockQuote yarn add @dittolive/ditto\@4.0.0 ::: [API Reference URL](https://software.ditto.live/js/Ditto/4.0.0/api-reference/) # JavaScript Version 4.0.0-beta1 Released: Thu Jan 26th 2023, 3:37 pm Release Notes: - Fixed: an issue which could cause Ditto to hang if more than 500 peers were encountered. - Fixed: AddWins removes will now be used if Installation: :::BlockQuote npm install --save @dittolive/ditto\@4.0.0-beta1 ::: If you have yarn: :::BlockQuote yarn add @dittolive/ditto\@4.0.0-beta1 ::: [API Reference URL](https://software.ditto.live/js/Ditto/4.0.0-beta1/api-reference/) # JavaScript Version 4.0.0-alpha2 Released: Mon Jan 16th 2023, 2:16 pm Release Notes: - Added: Installation: :::BlockQuote npm install --save @dittolive/ditto\@4.0.0-alpha2 ::: If you have yarn: :::BlockQuote yarn add @dittolive/ditto\@4.0.0-alpha2 ::: [API Reference URL](https://software.ditto.live/js/Ditto/4.0.0-alpha2/api-reference/)