Head-to-Head: io-ts vs ow Analysis

io-ts

v2.2.21(7 months ago)

This package is actively maintained.Types definitions are bundled with the npm packageNumber of direct dependencies: 0Monthly npm downloads

io-ts is a powerful TypeScript library for runtime type checking and validation. It allows you to define complex data validation rules using a concise and expressive syntax, ensuring type safety at runtime. With io-ts, you can easily create runtime validators for JSON data, API responses, and more, helping you catch errors early in your application.

Alternatives:
runtypes+
zod+
ajv+
joi+
yup+
class-validator+
superstruct+
typescript-is+
purify-ts+
simple-runtypes+

Tags: typescriptvalidationtype-checkingruntimefunctional-programming

ow

v2.0.0(about 1 month ago)

This package is actively maintained.The package doesn't have any types definitionsNumber of direct dependencies: 6Monthly npm downloads

OW is a flexible and composable validation library for JavaScript and TypeScript. It allows developers to define validation rules for various data types and structures, enabling robust input validation in applications. OW provides a fluent API for creating validation schemas with support for chaining multiple validation rules, custom error messages, and complex data structures.

Alternatives:
joi+
yup+
ajv+
superstruct+
zod+
prop-types+
class-validator+
validator+
io-ts+
typescript-is+

Tags: javascripttypescriptvalidationdata-validationfluent-api

Fight!

Popularity

Both io-ts and ow are popular npm packages in the JavaScript community. They have a decent following and are widely used in projects.

Type Safety

io-ts is a powerful runtime type system for TypeScript that allows you to define and validate data structures at runtime. It provides a way to define complex types and perform runtime type checking. ow, on the other hand, is a lightweight and expressive runtime type checking library that works with both TypeScript and JavaScript. It provides a simple and intuitive API for defining and validating types.

Integration

io-ts integrates well with other libraries and frameworks in the TypeScript ecosystem, such as TypeScript itself, TypeORM, and Express. It provides seamless integration with these tools and allows you to enforce type safety throughout your application. ow, on the other hand, is a standalone library that can be easily integrated into any JavaScript or TypeScript project.

Developer Experience

io-ts provides a rich and expressive API for defining types and performing runtime type checking. It has good documentation and a strong community support. ow, on the other hand, has a simpler API and is easier to get started with. It also has good documentation and community support.

Performance

io-ts is known to have a slightly higher performance overhead due to its more complex type system and runtime validation. ow, being a lightweight library, has better performance in terms of type checking and validation.

Maintenance

Both io-ts and ow are actively maintained by their respective communities. They receive regular updates and bug fixes. However, io-ts has a larger community and a more established presence in the TypeScript ecosystem, which ensures better long-term maintenance and support.