Pinia is a state management library for Vue applications that provides a centralized, type-safe architecture for organizing reactive data. It utilizes a modular store pattern, allowing developers to define independent, reusable state containers that manage shared application data, computed getters, and executable actions.
The library distinguishes itself through a flexible definition model that supports both functional setup patterns and traditional object-based structures. It features a plugin-based extension architecture that enables developers to hook into the store lifecycle for custom functionality, alongside built-in support for server-side rendering, hydration-aware state serialization, and hot module replacement during development.
Beyond its core state management capabilities, the project provides tools for composing multiple stores, extracting reactive references for safe destructuring, and mapping properties into legacy component structures. It also includes dedicated utilities for testing business logic and isolating state transitions, ensuring that complex application data remains consistent and verifiable throughout the development process.
