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Documentation: https://github.com/Effect-TS/effect/blob/main/packages/schema/README.md
In this video, I provide a comprehensive tutorial on @effect/schema, a powerful TypeScript library for data validation and transformation. I cover essential concepts like defining schemas, parsing data, and handling optional values, while also exploring advanced features such as custom filters, complex transformations, and error handling. I demonstrate how to effectively use Schema.transform and Schema.transformOrFail for sophisticated data manipulation, compose schemas for modular code, and work with discriminated unions for advanced typing. Throughout the tutorial, I offer real-world examples and comparisons to other libraries like Zod, making this an invaluable resource for developers looking to leverage @effect/schema in their TypeScript projects.
00:00 Introduction to @effect/schema
01:39 Understanding Decoding and Encoding in Schema Operations
02:49 Disclaimer
03:12 Fundamentals: Defining Schemas and Parsing Data
06:10 Using Either for Error Handling
09:19 Handling Optional Data: Null, Undefined, and Optional Schemas
11:32 Data Validation: Using Filters (Zod's refine Equivalent)
13:51 Practical Applications: Common Filter Utilities
16:50 Data Transformation: Introducing Schema.transform
18:32 Runtime Validations: "From" and "To" Checks in Schema.transform
20:30 Complex Transformations: Schema.transformOrFail for Encoding and Decoding
25:17 Schema Composition: Leveraging Schema.compose
29:50 Working with Discriminated Unions
31:26 Data Normalization: Using Schema.rename and Schema.transform
34:31 Avoiding Common Pitfalls: Schema.transform and Schema.typeSchema
37:10 Real-world Example: Unions with Schema.Literal
39:11 Error Paths (Zod's superRefine Equivalent)