# Change Log

All notable changes to this project will be documented in this file. See [standard-version](https://github.com/conventional-changelog/standard-version) for commit guidelines.

<a name="1.0.1"></a>
## [1.0.1](https://github.com/bigcommerce/data-store-js/compare/v1.0.0...v1.0.1) (2019-08-07)


### Bug Fixes

* **core:** CHECKOUT-4272 Only create new frozen objects if they are different from previous frozen objects ([1911834](https://github.com/bigcommerce/data-store-js/commit/1911834))



<a name="1.0.0"></a>
# [1.0.0](https://github.com/bigcommerce/data-store-js/compare/v0.2.7...v1.0.0) (2019-08-05)


### Features

* **core:** CHECKOUT-4272 Add ability to pass custom equality check function ([d574f1a](https://github.com/bigcommerce/data-store-js/commit/d574f1a))


### Performance Improvements

* **core:** CHECKOUT-4272 Switch to do shallow comparison by default ([953ee15](https://github.com/bigcommerce/data-store-js/commit/953ee15))


### BREAKING CHANGES

* **core:** This commit changes the way we detect changes between
the previous and the new state. Previously, we do a deep equality check
between the two by default. With this change, we do a shallow equality
check instead. This means that subscribers will get notified if any of
the immediate members of the previous state is different to the new.
This behaviour can be changed by configuring `equalityCheck` option when
creating the `DataStore` instance.



<a name="0.2.7"></a>
## [0.2.7](https://github.com/bigcommerce/data-store-js/compare/v0.2.6...v0.2.7) (2019-05-23)


### Bug Fixes

* **core:** CHECKOUT-4137 Catch error if unable to freeze or perform check ([a4d9ea6](https://github.com/bigcommerce/data-store-js/commit/a4d9ea6))



<a name="0.2.6"></a>
## [0.2.6](https://github.com/bigcommerce/data-store-js/compare/v0.2.5...v0.2.6) (2019-01-08)


### Bug Fixes

* **core:** CHECKOUT-3790 Allow `composeReducers` function to accept reducers of different type ([d66d0f4](https://github.com/bigcommerce/data-store-js/commit/d66d0f4))
* **core:** CHECKOUT-3790 Ensure reducers have the expected signature before composing them ([8b7f3a9](https://github.com/bigcommerce/data-store-js/commit/8b7f3a9))



<a name="0.2.5"></a>
## [0.2.5](https://github.com/bigcommerce/data-store-js/compare/v0.2.4...v0.2.5) (2018-12-03)


### Bug Fixes

* **core:** CHECKOUT-3135 Upgrade Rx to version 6 to bring in various performance improvements and features ([6849133](https://github.com/bigcommerce/data-store-js/commit/6849133))



<a name="0.2.4"></a>
## [0.2.4](https://github.com/bigcommerce/data-store-js/compare/v0.2.3...v0.2.4) (2018-11-15)


### Bug Fixes

* **core:** CHECKOUT-3462 Execute thunk actions sequentially ([5224e69](https://github.com/bigcommerce/data-store-js/commit/5224e69))



<a name="0.2.3"></a>
## [0.2.3](https://github.com/bigcommerce/data-store-js/compare/v0.2.2...v0.2.3) (2018-09-21)


### Bug Fixes

* **core:** CHECKOUT-3475 Export missing interfaces ([56ca1a3](https://github.com/bigcommerce/data-store-js/commit/56ca1a3))



<a name="0.2.2"></a>
## [0.2.2](https://github.com/bigcommerce/data-store-js/compare/v0.2.1...v0.2.2) (2018-08-23)


### Bug Fixes

* **common:** CHECKOUT-3462 Remove Node engine field ([3c034ce](https://github.com/bigcommerce/data-store-js/commit/3c034ce))



<a name="0.2.1"></a>
## [0.2.1](https://github.com/bigcommerce/data-store-js/compare/v0.2.0...v0.2.1) (2018-08-07)



<a name="0.2.0"></a>
# [0.2.0](https://github.com/bigcommerce/data-store-js/compare/v0.1.8...v0.2.0) (2018-08-07)


### Bug Fixes

* **core:** CHECKOUT-3011 Don't trigger subscribers if only transformed state changes ([f99d186](https://github.com/bigcommerce/data-store-js/commit/f99d186))


### Features

* **core:** CHECKOUT-3011 Skip initial subscriber notification ([2869178](https://github.com/bigcommerce/data-store-js/commit/2869178))



<a name="0.1.8"></a>
## [0.1.8](https://github.com/bigcommerce/data-store-js/compare/v0.1.7...v0.1.8) (2018-05-27)


### Bug Fixes

* **common:** CHECKOUT-3191 Fix sourcemaps by enabling `inlineSources` ([3b85d78](https://github.com/bigcommerce/data-store-js/commit/3b85d78))



<a name="0.1.7"></a>
## [0.1.7](https://github.com/bigcommerce/data-store-js/compare/v0.1.6...v0.1.7) (2018-05-14)



<a name="0.1.6"></a>
## [0.1.6](https://github.com/bigcommerce/data-store-js/compare/v0.1.5...v0.1.6) (2018-05-14)


### Bug Fixes

* **core:** CHECKOUT-3053 Fix issue related to error action not able to dispatch ([443c300](https://github.com/bigcommerce/data-store-js/commit/443c300))
* **core:** CHECKOUT-3053 More permissive default action type ([7b8e2ad](https://github.com/bigcommerce/data-store-js/commit/7b8e2ad))



<a name="0.1.5"></a>
## [0.1.5](https://github.com/bigcommerce/data-store-js/compare/v0.1.4...v0.1.5) (2018-05-10)



<a name="0.1.4"></a>
## [0.1.4](https://github.com/bigcommerce/data-store-js/compare/v0.1.3...v0.1.4) (2018-05-07)


### Bug Fixes

* **core:** CHECKOUT-3053 Export `Reducer` and `ReducerMap` interfaces ([d33d91c](https://github.com/bigcommerce/data-store-js/commit/d33d91c))
* **core:** CHECKOUT-3053 Fix type definition for `actionTransformer` option. Use `Subscribable` interface instead. ([53fc40e](https://github.com/bigcommerce/data-store-js/commit/53fc40e))



<a name="0.1.3"></a>
## [0.1.3](https://github.com/bigcommerce/data-store-js/compare/v0.1.2...v0.1.3) (2018-03-26)


### Bug Fixes

* **core:** CHECKOUT-3027 Fix thunk actions not getting dispatched in separate queues ([8a0f758](https://github.com/bigcommerce/data-store-js/commit/8a0f758))



<a name="0.1.2"></a>
## [0.1.2](https://github.com/bigcommerce/data-store-js/compare/v0.1.1...v0.1.2) (2018-03-20)


### Bug Fixes

* **core:** CHECKOUT-3007 Change `ThunkAction` return type to `SubscribableOrPromise` instead of concrete `Observable` type ([fa090e9](https://github.com/bigcommerce/data-store-js/commit/fa090e9))
* **core:** CHECKOUT-3007 Set default type for `ThunkAction` ([cbd7bdc](https://github.com/bigcommerce/data-store-js/commit/cbd7bdc))



<a name="0.1.1"></a>
## [0.1.1](https://github.com/bigcommerce/data-store-js/compare/v0.1.0...v0.1.1) (2018-03-13)


### Bug Fixes

* **core:** CHECKOUT-2450 Fix `Reducer` and `Action` type definition ([07f9baf](https://github.com/bigcommerce/data-store-js/commit/07f9baf))
* **core:** CHECKOUT-2992 `combineReducers` and `composeReducers` should only return new instance if different in value ([c4e416b](https://github.com/bigcommerce/data-store-js/commit/c4e416b))



<a name="0.1.0"></a>
# 0.1.0 (2018-03-01)


### Bug Fixes

* **core:** CHECKOUT-2450 Create new observable from observable-like action ([07aaed5](https://github.com/bigcommerce/data-store-js/commit/07aaed5))
* **core:** CHECKOUT-2450 Mark options as optional ([cbe8631](https://github.com/bigcommerce/data-store-js/commit/cbe8631))


### Features

* **core:** CHECKOUT-2450 Add `DataStore` module ([4fabb82](https://github.com/bigcommerce/data-store-js/commit/4fabb82))