[API reference](https://evolu.dev/docs/api-reference) › @evolu/common ## Modules | Module | Description | | ---------------------------------------------------------------------------------- | --------------------------------------------------------------------- | | [Array](https://evolu.dev/docs/api-reference/common/Array) | Array helpers that help TypeScript help you. | | [Assert](https://evolu.dev/docs/api-reference/common/Assert) | Runtime assertions for invariant checking. | | [BigInt](https://evolu.dev/docs/api-reference/common/BigInt) | BigInt arithmetic and comparison utilities. | | [Brand](https://evolu.dev/docs/api-reference/common/Brand) | A utility interface for creating branded types. | | [Buffer](https://evolu.dev/docs/api-reference/common/Buffer) | Binary data handling and byte array utilities. | | [Cache](https://evolu.dev/docs/api-reference/common/Cache) | Cache implementations including LRU eviction. | | [Callbacks](https://evolu.dev/docs/api-reference/common/Callbacks) | Request-response correlation for callbacks across boundaries. | | [Console](https://evolu.dev/docs/api-reference/common/Console) | Platform-agnostic console with structured logging. | | [Crypto](https://evolu.dev/docs/api-reference/common/Crypto) | Cryptographic utilities. | | [Eq](https://evolu.dev/docs/api-reference/common/Eq) | Equality comparison functions and utilities. | | [Error](https://evolu.dev/docs/api-reference/common/Error) | Error types and utilities for safe error handling. | | [Function](https://evolu.dev/docs/api-reference/common/Function) | Function utilities including exhaustive checks and composition. | | [Identicon](https://evolu.dev/docs/api-reference/common/Identicon) | Visual identicon generation from IDs. | | [local‑first/Db](https://evolu.dev/docs/api-reference/common/local-first/Db) | Platform-agnostic Evolu DbWorker. | | [local‑first/Error](https://evolu.dev/docs/api-reference/common/local-first/Error) | Evolu error types. | | [local‑first/Evolu](https://evolu.dev/docs/api-reference/common/local-first/Evolu) | Local-first platform. | | [local‑first/LocalAuth](https://evolu.dev/docs/api-reference/common/local-first/LocalAuth) | Local authentication and owner management. | | [local‑first/Owner](https://evolu.dev/docs/api-reference/common/local-first/Owner) | Owner identity and cryptographic key derivation. | | [local‑first/Protocol](https://evolu.dev/docs/api-reference/common/local-first/Protocol) | Evolu Protocol | | [local‑first/Query](https://evolu.dev/docs/api-reference/common/local-first/Query) | Query helpers, execution, and caching. | | [local‑first/Relay](https://evolu.dev/docs/api-reference/common/local-first/Relay) | Relay server for data synchronization. | | [local‑first/Schema](https://evolu.dev/docs/api-reference/common/local-first/Schema) | Database schema definition and validation. | | [local‑first/Shared](https://evolu.dev/docs/api-reference/common/local-first/Shared) | Platform-agnostic Evolu SharedWorker. | | [local‑first/Storage](https://evolu.dev/docs/api-reference/common/local-first/Storage) | Encrypted storage layer for local-first data. | | [local‑first/Timestamp](https://evolu.dev/docs/api-reference/common/local-first/Timestamp) | Hybrid logical clock timestamps for CRDT ordering. | | [Lookup](https://evolu.dev/docs/api-reference/common/Lookup) | Lookup-key collections and helpers. | | [Microtask](https://evolu.dev/docs/api-reference/common/Microtask) | Microtask queue utilities. | | [Number](https://evolu.dev/docs/api-reference/common/Number) | Number arithmetic, comparison, and branded numeric types. | | [Object](https://evolu.dev/docs/api-reference/common/Object) | Object utilities. | | [Option](https://evolu.dev/docs/api-reference/common/Option) | Optional value container. | | [Order](https://evolu.dev/docs/api-reference/common/Order) | Ordering and comparison utilities. | | [Platform](https://evolu.dev/docs/api-reference/common/Platform) | Platform runtime utilities and capability abstractions. | | [Polyfills](https://evolu.dev/docs/api-reference/common/Polyfills) | Polyfills. | | [Random](https://evolu.dev/docs/api-reference/common/Random) | Seeded random number generation. | | [Redacted](https://evolu.dev/docs/api-reference/common/Redacted) | Sensitive value protection against accidental exposure. | | [Ref](https://evolu.dev/docs/api-reference/common/Ref) | Mutable reference to an immutable value. | | [RefCount](https://evolu.dev/docs/api-reference/common/RefCount) | Reference counting helpers. | | [Relation](https://evolu.dev/docs/api-reference/common/Relation) | Bidirectional relations with O(1) lookup in both directions. | | [Resource](https://evolu.dev/docs/api-reference/common/Resource) | Concurrency-safe helpers for efficient reuse of disposable resources. | | [Result](https://evolu.dev/docs/api-reference/common/Result) | Type-safe error handling with Result types. | | [Schedule](https://evolu.dev/docs/api-reference/common/Schedule) | Composable scheduling strategies. | | [Set](https://evolu.dev/docs/api-reference/common/Set) | Set helpers. | | [Skiplist](https://evolu.dev/docs/api-reference/common/Skiplist) | Skiplist data structure with probabilistic level generation. | | [Sqlite](https://evolu.dev/docs/api-reference/common/Sqlite) | SQLite database abstraction and query execution. | | [Store](https://evolu.dev/docs/api-reference/common/Store) | Observable state container with change notifications. | | [String](https://evolu.dev/docs/api-reference/common/String) | String utilities for safe value conversion. | | [Task](https://evolu.dev/docs/api-reference/common/Task) | JavaScript-native structured concurrency. | | [Test](https://evolu.dev/docs/api-reference/common/Test) | Test utilities for deterministic testing. | | [Time](https://evolu.dev/docs/api-reference/common/Time) | Time representations, durations, and scheduling utilities. | | [Tracer](https://evolu.dev/docs/api-reference/common/Tracer) | Minimal tracer interface for observability. | | [Type](https://evolu.dev/docs/api-reference/common/Type) | Runtime type validation, parsing, and branded types. | | [Types](https://evolu.dev/docs/api-reference/common/Types) | TypeScript utility types. | | [WebSocket](https://evolu.dev/docs/api-reference/common/WebSocket) | WebSocket with auto-reconnect. | | [Worker](https://evolu.dev/docs/api-reference/common/Worker) | Platform-agnostic Worker abstractions. |