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colinhacks avatar

colinhacks/zod

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43,036 stars·2,034 forks·TypeScript·MIT·27 viewszod.dev↗

Zod

Zod is a TypeScript-first schema declaration and validation library designed to ensure end-to-end data integrity. It functions as a runtime type guard, allowing developers to define complex data structures through a declarative, chainable syntax. By using these schema definitions, the library automatically derives static TypeScript types, eliminating the need for manual type duplication and ensuring that runtime data matches expected application contracts.

The library distinguishes itself through functional schema composition, which enables the creation of hierarchical structures by nesting and chaining reusable primitives. It supports bidirectional transformation logic, allowing for the definition of custom encode and decode functions that maintain strict type integrity during data processing. Furthermore, Zod provides a tree-shakable interface that minimizes bundle size by allowing bundlers to exclude unused validation logic, while its support for recursive schema resolution handles complex, self-referential data structures at runtime.

Beyond core validation, the project offers a comprehensive suite of tools for managing data pipelines, including support for custom error handling, metadata-driven schema registries, and automated documentation generation. It integrates into broader development workflows by facilitating form state validation, mock data generation, and seamless interoperability with existing JSON Schema definitions.

Features

  • Data Schema Definitions - Define data structures using declarative syntax to specify expected input types and validation rules for reliable type inference throughout an application.
  • Data Validation Libraries - Provides robust runtime schema validation to ensure incoming data conforms to expected types and structures before processing.
  • Data Validation Schemas - Provides schema-based validation that automatically generates static types to ensure data integrity across the application.
  • Runtime Type Guards - Validates unknown data at application boundaries to guarantee adherence to expected type definitions.
  • Type System Tools - Uses language-specific compiler features to automatically derive static type definitions from runtime schema declarations for consistent type safety.
  • Object Schema Definitions - Define object schemas with required or optional properties and manipulate object shapes using methods like pick, omit, extend, or partial.
  • Schema Composition Libraries - Builds complex data validation logic by nesting and chaining small, reusable schema primitives into larger, hierarchical structures.
  • Data Serialization Codecs - Enables the composition of bidirectional data transformations to handle complex structures with full type safety.
  • Data Serialization Frameworks - Implements custom bidirectional data transformations and encoding logic to map between input and output types while maintaining schema integrity.
  • Data Transformation Pipelines - Processes and sanitizes raw input through validation and conversion steps to ensure data matches expected internal formats.
  • Data Validation Libraries - Provides robust schema parsing and validation capabilities with support for both synchronous and asynchronous data processing.
  • Bidirectional Data Mappers - Maps input data to output formats through defined encode and decode functions while maintaining strict type integrity in both directions.
  • Data Transformation Layers - Provides a transformation layer that maps raw input into strongly-typed objects with custom serialization and parsing logic.
  • Recursive Data Schemas - Define self-referential or mutually recursive data structures using language features that resolve cyclical schema references at runtime.
  • Schema Validation Frameworks - Validate data against schemas using a lightweight, tree-shakable interface that reduces bundle size by replacing chainable methods with functional composition.
  • Schema Validation Utilities - Provides a functional interface for applying validation rules and data transformations to schemas.
  • Test Data Management - Generates random or semantically meaningful mock data from schema definitions to facilitate automated testing and development workflows.
  • API Integration Tools - Integrates schema definitions directly into server-side logic to ensure type-safe communication and automated documentation generation.
  • Form Validation Libraries - Provides schema-based validation for form submissions to ensure data integrity across client and server interfaces.
  • Type-Safe API Integrations - Ensures consistent data contracts between client and server by sharing schema definitions to prevent runtime errors during network communication.
  • Data Validation - TypeScript-first schema validation with static inference.
  • Data Validation - TypeScript-first schema validation.
  • Testing and Quality Assurance - TypeScript-first schema validation with static type inference.
  • Type Checkers - TypeScript-first schema validation with built-in static type inference.
  • Primitive Type Schemas - Define schemas for primitive data types and optionally coerce input values into the target type using built-in conversion utilities for strings, numbers, or booleans.
  • Schema Validation Refinements - Perform custom validation logic on any schema using refinement functions that support custom error messages, path targeting, and abort-on-failure behavior.
  • Validation Pipelines - Executes a sequence of synchronous or asynchronous checks and transformations on raw input data to ensure adherence to defined constraints.
  • Schema Registries - Create custom registries to manage and associate typed metadata with specific schemas while supporting type constraints and references to inferred data types.
  • Data Transformation Pipelines - Transform input data into new formats or types using synchronous or asynchronous functions combined with validation pipes to process data through multiple stages.
  • Recursive Schema Resolvers - Handles self-referential or circular data structures by deferring the evaluation of schema references until the moment of runtime execution.
  • Tree-Shakable Architectures - Organizes the codebase into modular components that allow bundlers to exclude unused validation logic to minimize the final application size.
  • Schema Converters - Convert JSON Schema definitions into corresponding schema objects to enable validation and type inference within the application environment.
  • Automated API Documentation - Generating accurate API specifications and documentation directly from source code definitions to keep technical references synchronized with the implementation.
  • Data Validation Utilities - Parse and validate input data using standard methods on schema objects to ensure data integrity throughout the application.
  • Error Handling Utilities - Provides utilities to flatten complex validation error objects into simplified structures for easier consumption in user interfaces.
  • Internationalization Utilities - Supports dynamic loading of language packs to provide localized error messages within the validation system.
  • Schema Metadata Utilities - Attach custom metadata to schema instances to store identifiers, titles, or descriptions for use in external tools like automated documentation generators.
  • Schema Registries - Maintains a central store of schema definitions and associated metadata to enable cross-referencing and automated documentation generation for complex systems.
  • Validation Error Formatters - Converts complex validation error structures into clear, human-readable summaries for improved debugging and user feedback.
  • Validation Error Handlers - Allows developers to define custom strings or functions to generate dynamic, context-aware feedback when validation rules fail.
  • Validation Error Utilities - Convert validation errors into a nested object structure that mirrors the schema to allow developers to traverse and access errors at specific paths.

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Frequently asked questions

What does colinhacks/zod do?

Zod is a TypeScript-first schema declaration and validation library designed to ensure end-to-end data integrity. It functions as a runtime type guard, allowing developers to define complex data structures through a declarative, chainable syntax. By using these schema definitions, the library automatically derives static TypeScript types, eliminating the need for manual type duplication and ensuring that runtime data matches expected application contracts.

What are the main features of colinhacks/zod?

The main features of colinhacks/zod are: Data Schema Definitions, Data Validation Libraries, Data Validation Schemas, Runtime Type Guards, Type System Tools, Object Schema Definitions, Schema Composition Libraries, Data Serialization Codecs.

What are some open-source alternatives to colinhacks/zod?

Open-source alternatives to colinhacks/zod include: open-circle/valibot — Valibot is a modular, type-safe schema library for validating and parsing structural data in TypeScript environments. jquense/yup — Yup is a JavaScript schema validation library used to define data shapes and validate runtime values. It functions as… ianstormtaylor/superstruct — Superstruct is a JavaScript and TypeScript data validation library used to verify that data structures match defined… ajv-validator/ajv — Ajv is a high-performance data validation framework that compiles JSON schemas into optimized, standalone JavaScript… hapijs/joi — Joi is a JavaScript data validation library used to define schemas that validate, cast, and sanitize data objects. It… sideway/joi — Joi is a JavaScript data validation library used to define schemas that ensure the structure and data types of objects…