skipVoid and store without sid will point to the line of store creation. This will help locate troublesome units easilyscopeBind. This feature indirectly allows to use multiple arguments in reflect (issue reflect#91)clearNode (issue #1200) attach({ effect }), allowing to pass explicit name in this overload (issue #1000) allSettled calls with derived units. This case was labeled as a type error, but was forgotten in runtime. EventCallable, StoreWritable and UnitTargetable types to allow users to express and understand what could be updated or called directly and what could not. Now createStore returns StoreWritable which can be passed to sample target and combine returns Store which will show type and runtime error (PR #966)addLoc: true in babel-plugin. Usually the one wanted to enable this in development only so addLoc plugin option is disabled by default (PR #1015)batch option to createWatch (PR #850)@withease/factories to babel-plugin defaults (PR #995)patronum modules to babel-plugin defaults (PR #996)greedy to batch in sample. greedy: true becomes batch: false which is a better mental model for what this option do (PR #972)merge and restore (PR #969)domain to be used in attach without parent effect (PR #895) .reinit, now it exists in StoreWritable and not exists in Store (PR #966)combine calls (PR #916)attach (PR #1011) skipVoid: true option in combine and map to enable old behavior. Getting rid of that edge case will allow to introduce lazy computations (issue #920)forward and guard in favor of sample (PR #913)reactSsr option in babel-plugin (PR #910)onlyChanges option in serialize (PR #907){[fx.sid]: Function} in fork handlers (PR #973).watch with second argument in favor of sample (PR #906).getType() - relic from ancient times which exists for redux compatibility (PR #899)effector/babel-plugin-react (PR #948)fork(domain) and hydrate(domain) - this api existed for traking units in scopes when Fork API was introduced, but starting from 22 version this is done automatically and domain is no longer required for that (PR #950) fn in $store.map(fn) returns undefined in the initialization (issue #828) effector/fork module (PR #842)createStoreObject alias for combine (PR #908).thru method (PR #843)$store.map (PR #846)restore($store) support. This was an obscure feature when store is passed to method and returned without changes as is (PR #1018) UnitTargetable, EventCallable and StoreWritable as aliases to improve migration experience and ecosystem compatibility combine function called twice on first allSettled call (PR #984) 22.8.2: now combine in tuple-form handles compelx edge-cases with mapped stores correctly. (PR #902) 22.8.4: now fix works for fork({ handlers }) calls too. PR #898 fork calls without sid (function from release 22.8.0). Some libraries provide built-in sid’s in the code, which led to the duplicated sid found exception when calling fork when trying to use two instances of the same factory in a test and running it without effector/babel-plugin. The exception on fork calls is no longer thrown, and all sid-related checks and assertions have been moved to serialize calls, since sid’s are actually only required for serialize to work. PR #897 fork({ values, handlers }), which allows to run tests without effector/babel-plugin. Note, that plugin and sids are still required for SSR. (PR #855) Declaration type, provide missing top-level properties for region and factory typesid to Declaration type withRegion exports definition for effector/inspect API serialize: "ignore" in fork({ values }) (PR #862) allSettled(scope) feature. source. This case now supported and typechecked correctly: Note that the one need to use “as const” in that case to got correct typechecking because without it typescript cannot infer the type [Store<string>, Store<number>]. We are working to avoid that limitation, stay tuned!
store.reinit event to set default value into store (PR #797) is.attached method to detect effects created via attach (PR #670)Gate to be serialized (as this requires changes in babel plugin) (PR #683) filter option to sample, thereby making guard an alias (issue #521) clock option to split (issue #537) sample type checking:split type checking:sample, guard, split and forward are deprecated (issue #563)merge, sample and split are deprecatedrestore($store) is deprecated (issue #571)attach got correct name for use in developer tools like effector-logger (issue #527)sample/guard pass obsolete data from it’s source store (issue #544)combine with fork api (issue #613)effector/babel-plugin changes function calls which it should avoid (issue #603)effector/babel-plugin (issue #601)combine support for units with large union types (issue #531)Event<unknown> (PR #454)effector/babel-plugin in patronum/macro .on and .reset methods debugSids to effector/babel-plugin The option allows adding file path and variable name to a sid for each unit definition. It allows to easily debug serialized scope using SSR.
attach({source, async effect(source, params) {}})const scope = fork()Unit not found in scope error is no longer exists, any unit could be used in any scopefork and serialize a hundredfoldfork({values: [[$user, 'alice'], [$age, 22]]})serialize: 'ignore' option to createStore to declare store as ignored by serialize callsonlyChanges: true a default serialize optioncombine arguments and throw an error in case of undefined and non-store units (issue #509)createStoreObject alias for combineeffector/fork module.thrustore.map.on in derived stores created by store.map and combineevent.map, event.filterMap and event.filterfx.done, fx.doneData and other events belongs to effectsɔ (latin small letter open o) symbol to prevent incorrect unicode parsingscope.find which is a wrong abstraction for a new forkScope a unit:Scope to is.unitis.scope methodscopeBind(unit, {scope}), which is also can be used outside from .watchsplit. Case functions and stores will choose target case by its name, matcher stores are boolean stores which indicate whether to choose given case updateFilter config field to createStore to skip arbitrary store updates (discussion #428) sample with clock without source. For example, it useful in cases when clock is array of units and no source stores is needed clock to guard to improve developer expirience in cases when update trigger (clock field) and data source (source field) are different things Add addNames field to babel plugin (PR #450)
Add type support for Scope to clearNode (issue #441)
Add compositeName to Domain typings, making it consistent with other units
Add EventPayload and UnitValue type helpers (PR #434)
Improve various edge cases with fork api and serialization
Improve typechecking for attach (issue #439)
Fix various type issues in sample and guard typings
factories in effector/babel-plugin accepts array of module names which exports will be treated as custom factories therefore each function call will provide unique prefix for sid properties of units inside them Import createEffectStatus from './createEffectStatus' was treated as factory function so each store created by it has its own sid and will be handled by serialize independently, although without factories they will share the same sid
Add user-friendly unit name in fork api error messages when given unit is not found in scope. This improves error messages in both effector and effector-react
Add validation for values and handlers fields in fork and for values field in hydrate
Add type support for createEffect<typeof handler, Error>(handler) to infer Params and Done types from given handler and provide custom Fail type at the same time
createEffect and custom errors in documentation
Add support for attach({effect}) to create effect which will call effect with params as it is. That allow to create separate effects with shared behavior (PR #396 and #397 (thanks @sergeysova and @oas89))
Add reactSsr option to effector/babel-plugin to replace imports from effector-react to effector-react/ssr. Useful for building both server-side and client-side builds from the same codebase
allSettled. When allSettled is called with Effect, it return object with value and status fields (discussion) createEffect(handler) Add types for domain.effect(handler)
Fix effector/babel-plugin behavior in case when methods like createStore are imported from unrelated library and should be ignored. Import library could be defined by importName config field
Improve fork api support for watchers
createEffect(handler) createEffect(handler) in documentation
attach({source, effect}) without mapParams: in case with source and effect only, inner effect will be triggered with source values attach({effect, source}) in documentation
it’s a shorthand for common use case:
attach mapParams field: errors happened in mapParams function will force attached effect to failsplit and createApiname field to attach typings.filter and .filterMap to effect typings (PR #376)forward, attach, sample and guard: attempt to call these methods without arguments will lead to error with user-friendly descriptionclock field which acts like a merge call sample in case of config formpackage.json to package exports field (read more in nodejs documentation) Add onlyChanges option to serialize to ignore stores which didn’t changed in fork (prevent default values from being carried over network)
Add type helpers for stores and effects: StoreValue, EffectParams, EffectResult and EffectError
domain.createEffect to infer type from given handler (that feature was already implemented for createEffect method), this code now typechecked as expected: allSettled with void units without params field, this code now typechecked as expected: split for pattern-matching without additional forwards You can match directly to store api as well:
effector/fork into effector. Now all methods required for SSR are exported from the library itself, making effector/fork an aliasScope type alias for Forkimport {createStore} from 'effector/effector.mjs'console.error with undefined return, which was violating the type of effectrestore aliases, event.filter(fn) alias for event.filterMap(fn), greedy in sample as separate last argument and unused blocks and Kind attach to domain effects, allowing these effects to be called within other effects when using fork event.watch watcher, this code now throw error as expected: createNode to call without arguments Step type alias for Node guard got Boolean (a function) as filter handlers to fork to change effect handlers for forked scope (useful for testing) scope.getState(store) to access to store values in forked scopesvalues support for fork store.on (PR #328) clearNode(unit) from their parent domain hooks and history sets ignore parameter to serialize to skip stores during app state serialization PR #325 (thanks @sergeysova) effector/babel-plugin when inability to determine unit name led to the absence of sid property hydrateallSettled support for effects as first argument attach: wrapper for effect, which allow to map effect arguments and use data from stores. Use cases: declarative passing values from stores to effects and argument preprocessing.
noDefaults option for effector/babel-plugin for making custom unit factories with clean configuration source will become clock as well) domain.hooks calls as escape hatch for imperative adding units to given domain effect.doneData and effect.failData events with effect result and error values as shorthands for common use cases effect.done.map(({result}) => result) and effect.fail.map(({error}) => error) Documentation for effect.doneData
Documentation for effect.failData
effect.inFlight store to effects. It show how many effect calls aren’t settled yet. Useful for rate limiting. Documentation for effect.inFlight
withRegion: region-based memory management tool, which attach units (stores, events and effects) and watchers, created inside given callback to lifecycle of owner unit to be erased together with it. Map<Store, any> to values property in fork.effect.pending: it will become false only after all pending effect calls becomes settled. launch({target: unit, params}) overload for launch - low level method for running computation in units (events, effects or stores). Mostly used by library developers for fine-grained control of computations. effector/fork and effector-react/ssr: api for server side rendering and managing independent instances of application in general. This solution requires effector/babel-plugin in babel configuration:
Example application with express Serverless example
createApi, stores created with restore and events created with .prepend to domain of given source units combine batching in a few edge cases with nested combine calls domain.createStore as alias for domain.store (proposal)domain.createEvent as alias for domain.eventdomain.createEffect as alias for domain.effectdomain.createDomain as alias for domain.domain sample typings for typescript (PR #248, fix #247) (thanks @bloadvenro) forward createStoreObject to combine to reduce api surface. Wherever createStoreObject was used, it can be replaced with combine combine effect.done and effect.fail are called before effect.finally watchers, thereby preventing side-effects from interrupting pure computations sample({clock: undefined}) forward typings for typescript (PR #229, fix #174) (thanks @bloadvenro)clearNode(domain), introduced in effector 20.2.0 guard: conditional event routing Control one event with the help of another: when the condition and the data are in different places, then we can use guard with stores as a filters to trigger events when condition state is true, thereby modulate signals without mixing them See ui visualization
Also, guard can accept common function predicate as a filter, to drop events before forwarding them to target
Type inference Implementation tests
name property in sample parameters list Each basic entity in effector (event/effect/store/domain) may have a name. You now can name sampled entities in the same manner as basic ones.
split method (PR)clearNode been called on store belonged to certain domain led to the removal of the entire domain shortName to domains history to domains with read-only sets of events, effects, stores and subdomains clearNode .sid - stable hash identifier for events, effects, stores and domains, preserved between environments, to handle client-server interaction within the same codebase. The key is that sid can be autogenerated by effector/babel-plugin with default config and it will be stable between builds
See example project
createEffect for typescript #106 cannot read property .toString of undefined error during store initialization event.filter({fn}) got a predicate function as a callback PR is methods PR effector/compatsampleeffector/babel-plugin to work in browser effector/compat module to use with Smart TV (Chrome 47) apps without babel (fix #152). Starting with this release, the library code is tested by browserstack.com for compatibility with our targets, including smart tvsample (thanks @abliarsar) (PR #156)merge for merging events split for pattern-matching over events clearNode to automatically dispose all related intermediate steps Fix promise warning for effects
Add effect.finally
event.filterMap as new alias for event.filter(fn)extract, withProps, is.* re-exports event.filter with common predicate functions To indicate the stability of the project, we adopting semantic versioning and happy to announce version 19.0.0 for all packages. And to make the transition easier, that release contains no breaking changes; simple replacement of “^0.18.*“ to “^19.0.0” is safe for sure ☄️
store.updates, representing updates of given store. Use case: watchers, which will not trigger immediately after creation (unlike store.watch)clearNode to erase information from the node itself, in addition to the existing opportunity to erase subscribers (thanks @artalar)store.reset Add support for createEvent and createEffect with config (see next code example)
Add .pending property for effects
it’s a shorthand for common use case
sample. Sample allows to integrate rapidly changed values with common ui states Plugins are available out from a box
.babelrc:
Use the new kernel. Provide improved eventual consistency: any side effects will be triggered only after performing all pure computations
Add is namespace for all type validators
Add clearNode to break references and subscriptions between events, stores, etc
Add support for custom datatypes by making step constructors, createNode and launch functions public
fromObservable, ensure it works with redux as a typical library with Symbol.observable support version, now it always equals version in package.json Add effect handler to domain 4c6ae8
Add Unit<T> as common interface implemented by Event, Effect and Store
Add isStore, isEvent, isEffect and isUnit validators
createStore with config Fix webpack usage issue. To prevent this in a future, webpack integration test was added.
Improve typescript typings for createApi. This code example became type checked
forward: common function for forwarding updates and events store.on {handler: Function} as second argument to createEffect effect.use return the same effect instead of void (ability to chain method calls) store.defaultState propertycreateComponentwithProps static functioncreateWrappedDomain to watch all nested events and updatesextract to watch only part of nested storages.epic method (library supports symbol-observable, so assumed that most.from(event) or Observable.Of(store) covered all use cases) effect.use.getCurrent() method to get current used functioncreateStoreObjectcreateStore method.get(), .set(x) and .map(fn) methods)from(effect) mill to collectjoint to combine .useeffectImplementationCheck to unused rootDomain alias for createRootDomaintypeConstant eventsDomainAuto, EventAuto and EffectAutomill fluent “AND” reducer combinator First stable version
Proof of concept
useUnit([fx]) with effect with custom error (PR #1070) Gate.open and Gate.close EventCallable to allow users to call it in tests useStore appeared in useList (PR #1022) effector-react/scope in favor of isomorphic hooks (PR #979)useStore, useEvent, connect and createStoreConsumer in favor of universal useUnit (PR #951)createComponent in favor of @effector/reflecteffector-react/ssr module (PR #844)createWatch implementation to improve @effector/next updates flow useUnit updates useUnit during event change (issue #900, PR #901) <Gate /> will also be isomorphic by scope. @@unitShape protocol (PR #803) in useUnit useEvent, useStore, useStoreMap and useList isomorphic, now they would use scope from the Provider if it is available and scope-less mode otherwise. For useUnit it was done in 22.2.0.forceScope to useEvent, useStore, useStoreMap and useList to force usage of scope from Provider, it would throw an error if Provider is not available, /scope module sets forceScope to true by default useUnit isomorphic, now it would use scope from the Provider if it is available and scope-less mode otherwise (PR #776 and PR #785)forceScope to useUnit to force usage of scope from Provider, it would throw an error if Provider is not available (PR #776 and PR #785), /scope module sets forceScope to true by defaultuseUnit (PR #747) useUnit method to read multiple stores and bind events or effects to scope in a single batched call (PR #733, #738) placeholder option to useList to render in cases of empty list defaultValue option to useStoreMap to return in cases when fn returns undefined Gate.status store being serialized (PR #683) Can't perform a React state update on an unmounted component warning for useStoreMap in a few cases (issue #574) effector-react/scope and make effector-react/ssr an alias for itCannot update a component warning in useGateundefined in useStoreMapdomain field in createGate optionalcreateContextComponent and createReactStateuseStoreMap with scope (PR #474) updateFilter to useStoreMap. It helps to control component rerendering, e.g. when component should rerender only when id field is changeduseStoreMap($store, value => result) shorthandgetKey to useList. Function in this field will be used to compute key for every item of listuseStore (PR #431)createGate to gate.displayName and gate units (issue #449)useEvent when used effect throw an error createGate implementation to effector-react/ssr useEvent. It’s a shorthand for calling several useEvent at once (PR #425 by @sergeysova) Gate.isOpen plain property, which was incompatibile with concurrent mode and ssr, use Gate.status instead useGate with fork support from effector-react/ssr domain optional field to createGate which will be used to create gate units (useful for ssr) createGate({domain}) in documentation
useList hook typings for typescript exported from effector-react/ssr by allowing usage as components’ return value (fix DefinitelyTyped issue) Gate state in createGate via defaultState field createGate({defaultState}) in documentation
object restriction from createGate Props type in typescript, as it becomes useless with introduction of useGate. This code now passes type checking successfully effector-react/compat and effector-vue/compat compatibility with IE11 useList hook typings for typescript by allowing usage as components’ return value (fix DefinitelyTyped issue) This code now works without type errors:
useGate, thereby making it consistent with <Gate />createContextComponent and createReactState, which previously were based on createComponent ReadonlyArray to useList for typescript Cdn with umd build of effector-react Cdn with umd build of effector-vue
effector/fork and effector-react/ssr: api for server side rendering and managing independent instances of application in general. This solution requires effector/babel-plugin in babel configuration:
Example application with express Serverless example
createApi, stores created with restore and events created with .prepend to domain of given source units fn argument types without as const in useStoreMap. In effector-react 20.0.3 we introduced an improvement for useStoreMap types, which helps to infer types of fn arguments from keys. And now useStoreMap types improved even more: every item in second argument will have its own type even without as const, out from a box PR #274 (thanks @abliarsar)
Gate.open & Gate.close events keys field in useList. By default, useList rerenders only when some of its items was changed. Howewer, sometimes we need to update items when some external value (e.g. props field or state of another store) is changed. In such cases we need to tell react about our dependencies and pass keys explicitly. createComponent effector-react/compat and effector-vue/compat effector-react/compat module to use with Smart TV (Chrome 47) apps without babel useList for efficient rendering of store lists useStore with lack of store updates triggered by react hooks in children components as const typescript assertion for useStoreMap keys. It helps us to infer type for fn arguments In typescript versions below 3.4, you can still use an explicit type assertion
as const in typescript docs
useStore argument change useStoreMap useStoreMap hook to select part from a store. Motivation To indicate the stability of the project, we adopting semantic versioning and happy to announce version 19.0.0 for all packages. And to make the transition easier, that release contains no breaking changes; simple replacement of “^0.18.*“ to “^19.0.0” is safe for sure ☄️
createComponent createStoreObject in createComponent mounted and unmounted events to components created by createComponent useLayoutEffect with useIsomorphicLayoutEffect to support server-side rendering useEffect with useLayoutEffect in useStore hook to response to state changes immediately Big thanks to egoson for making this release possible
useStoreMap hook for Vue 3 composition API to select part from a store ((PR #780)[https://github.com/effector/effector/pull/780]) by @ilajosmanov useStore useVModel useGate createGate see docs Migrated from Vue.util.defineReactive to Vue.observable
Effector stores will show in Vue devtools
Cosmetic improvements for support plugin in the future.
Now we can add some units to effector object (will be return Store<number>)
effector-react/compat and effector-vue/compat compatibility with IE11 Vue.extend (PR #343) Cdn with umd build of effector-react Cdn with umd build of effector-vue
createComponent HOC for TypeScript usage. This HOC provides type-safe properties in vue components. effector-react/compat and effector-vue/compat effector-vue/compat module to use with Smart TV (Chrome 47) apps without babel Vue adapter for effector 20
To indicate the stability of the project, we adopting semantic versioning and happy to announce version 19.0.0 for all packages. And to make the transition easier, that release contains no breaking changes; simple replacement of “^0.18.*“ to “^19.0.0” is safe for sure ☄️