stateplus library

StatePlus: A lightweight reactive state management and navigation library for Flutter.

This library provides reactive primitives (Signal, Computed, effect) for building reactive UIs, along with Flutter widgets (StateWidget, StateRouter) and a simple reactive routing solution (RouteState).

Example:

import 'package:stateplus/stateplus.dart';

final count = Signal<int>(0);

StateWidget(
  builder: () {
    return Text('Count: ${count.value}');
  },
);

count.value = 1; // Automatically rebuilds the widget

Classes

Computed<T>

A reactive value that automatically recalculates whenever its dependencies change.

RouteState

Manages the current route path as a reactive signal.

Signal<T>

A reactive value that notifies observers when it changes.

StateRouter

A widget that renders different UI based on the current route state.

StateWidget

A widget that rebuilds itself whenever any reactive dependencies used inside its builder change.

Functions

effect(void fn()) → void

Runs a side-effect whenever any reactive dependencies used inside fn change.

Typedefs

Listener = void Function()

A listener callback function for Signal updates.