State Management
State Management Patterns
State choices determine how predictable your UI feels. These patterns help you reason about where data lives, who updates it, and how to keep components in sync without endless prop drilling.
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Patterns
State Management
State Management Patterns
Specific, reusable techniques you can drop into production.
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Async Validation
Perform server-side validation checks without blocking user interaction.
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Component State
Manage data that only affects a single component internally.
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Conflict Resolution
Handle concurrent updates and data conflicts in distributed systems with last-write-wins, operational transforms, or CRDTs.
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Controlled Input
Synchronize form inputs with component state for full programmatic control.
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Dependency Injection
Provide dependencies from the outside rather than creating them internally for better testability.
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Derived State
Compute values from existing state rather than storing redundant data.
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Field-Level Validation
Validate individual form fields as users interact with them for immediate feedback.
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Flux
Implement unidirectional data flow architecture with actions, dispatchers, stores, and views.
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Form Library Integration
Leverage third-party form libraries to handle complex validation and submission logic.
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Form State Machine
Model form states (pristine, dirty, submitting, error) as explicit state transitions.
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Form-Level Validation
Validate entire forms on submission to check cross-field rules and constraints.
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Immutable Update
Treat state as immutable and create new copies when making changes for predictability.
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Lazy Initialization
Defer expensive state calculations until the first render when they're needed.
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Multi-Step Form
Break long forms into sequential steps with progress tracking and navigation.
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Multi-Store
Divide application state into multiple independent stores for better separation of concerns.
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Normalized State
Structure state as flat lookup tables to avoid data duplication and simplify updates.
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Observer
Allow multiple components to subscribe and react to state changes automatically.
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Pub/Sub
Decouple components through event-based communication without direct references.
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Selector
Compute derived data from state and memoize results to optimize re-renders.
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Server State vs Client State
Distinguish between data owned by the server (cached temporarily) and local UI state for proper management strategies.
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Service Locator
Provide a centralized registry for accessing shared services throughout the application.
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Single Store
Centralize all application state in one location for predictable updates.
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State Batching
Group multiple state updates together to minimize re-renders and improve performance.
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State Colocation
Keep state as close as possible to where it's used to reduce complexity. (See also: Colocation Pattern)
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State Lifting
Move state up the component tree to share it between sibling components.
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State Reducer
Use reducer functions to handle complex state transitions with predictable logic.
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State Synchronization
Keep component state in sync with external data sources or other components.
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