Dart 3 compatible

funx

A Dart package of composable function decorators. Wrap ordinary functions in small, chainable building blocks for timing, concurrency, reliability, caching, observability, and more.

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Version 1.3.1 · MIT License

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Each category groups related decorators so you can find the right tool quickly.

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Read the full overview, install the package, and run your first decorator.

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Core

The building blocks: Func, Func1, Func2, validation, guards, and snapshots.

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Concurrency

Locks, semaphores, pools, and isolates for safe parallel execution.

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Control Flow

Branch, loop, gate, and compose functions with predictable control flow.

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Error Handling

Retry, fallback, circuit breakers, and structured error recovery.

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Observability

Logs, metrics, tracing, and health checks for your functions.

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Orchestration

Sagas, schedules, pipelines, and distributed coordination.

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Performance

Caching, memoization, throttling, and debouncing.

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Reliability

Idempotency, timeouts, hedging, and bulkheads.

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Scheduling

Run functions once, on intervals, with cron, or after delays.

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State

Snapshots, state machines, and persistent function state.

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Timing

Deadlines, timeouts, rate windows, and time-based policies.

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Transformation

Map, adapt, serialize, and reshape inputs and outputs.

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Validation

Schema checks, guards, contracts, and input validation.

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