lazx 2.1.0

A state management library based on the ViewModel design pattern for Flutter.

2.1.0

New features

• Stream Operators: Extension methods on LazxData that return read-only derived data
  • debounced(Duration) — emits value only after a pause in updates (search fields, form validation)
  • throttled(Duration) — limits emission rate (scroll events, rapid taps)
  • distinct([equals]) — skips consecutive duplicate values, with optional custom comparator
• LazxDerivedData: Read-only LazxData subclass backing the stream operators. Works as a drop-in replacement in all Lazx builders. Calling push(), setState(), or reset() throws UnsupportedError
• LazxComputed: Derived reactive values that auto-recompute when any source changes. Supports mixed source types (LazxData, LazxObserver, LazxState), aggregates state with Error > Loading > Success > Initial priority, and is distinct by default (skips rebuild if computed value unchanged)
• Chaining: Operators can be chained (e.g. query.debounced(...).distinct())
• Testing Helpers (package:lazx/lazx_testing.dart): Extension methods for async test assertions
  • waitForState(LxState) — completes when the target state is observed
  • expectStateSequence(List<LxState>) — strict ordered state sequence check
  • waitForValue(T) — completes when the target value is observed
  • expectEmits(List<T>) — verifies a sequence of emitted values

2.0.0

Breaking changes

• LazxObserver: observer getter renamed to stream (aligns with LazxData.stream)
• LazxObserver: set() renamed to push() (aligns with LazxData.push())
• LazxDisposable: New base class for all Lazx reactive types — both LazxObservable and LazxObserver implement it
• LazxViewModel.props: Type changed from List<LazxObservable> to List<LazxDisposable> — can now hold any Lazx reactive type
• LazxManager.props: Type changed from List<LazxObserver> to List<LazxDisposable> — unified with ViewModel

New features

• LazxData.reset(): Restores value and state to their initial values
• Lifecycle hooks: LazxViewModel.onResume() and onPause() — automatically called when the app goes to foreground/background via LazxView's WidgetsBindingObserver
• LazxViewModel.isDisposed: Tracks whether the ViewModel has been disposed — useful to guard async callbacks
• LazxExecutor mixin: Opt-in execute<T>(task, {silent}) with automatic isLoading/error management. Add with LazxExecutor and spread ...executorProps into your props list
• Typed LazxMultiBuilder: LazxMultiBuilder2 through LazxMultiBuilder5 — type-safe variants that provide typed values directly in the builder callback instead of List<dynamic>

Bug fixes

• LazxStateBuilder, LazxDataBuilder, LazxWidget: Fix stream subscription leaks — subscriptions are now stored and canceled on dispose
• LazxDataBuilder: Add missing mounted guard before setState()
• LazxObserverBuilder: Rewrite as StatefulWidget — was previously calling .listen() inside build(), leaking a new subscription on every rebuild
• LazxListener: Add dispose() method to cancel the stream subscription
• LazxApp: Register WidgetsBindingObserver with addObserver/removeObserver — lifecycle callbacks (including manager disposal on app detach) were previously dead code

1.1.6

• Update SDK constraint to >=3.5.0 <4.0.0
• Update Flutter constraint to >=3.24.0
• Update provider to ^6.1.5
• Remove explicit meta dependency (use Flutter SDK's version)
• Update demo projects SDK constraints

1.1.5

• Upgrade all libs versions
• Add a new widget: LazxMultiBuilder
• Upgrade & Update demos with the new widget
• Update README with the new components

1.1.4

• Upgrade all libs versions + Demos

1.1.3

• Upgrade all libs versions

1.1.2

• Downgrade version of rxdart to support graphql lib

1.1.1

• Update README with the new components
• Add link for the new demo, Lazx Weather

1.1.0

• Add Lazx App Widget + Tests
• Add Lazx Listener + Tests
• Add Lazx State + Tests
• Add Lazx Observer + Tests
• Add Lazx Response + Tests
• Add Lazx Observable

1.0.1

• Add example main.dart + demos folder

1.0.0

• Initial release