Type Safety and Contracts
Type Safety and Contracts
Strong contracts reduce runtime surprises and accelerate refactors. These patterns keep your types honest across API boundaries, components, and data pipelines.
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Patterns
Type Safety and Contracts
Type Safety and Contracts Patterns
Specific, reusable techniques you can drop into production.
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API Schema
Define and enforce contracts for API request and response structures.
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Branded Type
Create distinct types from primitives to prevent mixing incompatible values.
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Component Interface
Define clear contracts for component inputs and outputs.
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Contract Testing
Verify that components and APIs adhere to their defined interfaces.
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Discriminated Union
Use tagged unions to model mutually exclusive state variants safely.
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Event Handler Contract
Type event handlers to ensure type-safe event handling.
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Form Data Type
Type form data structures strongly to prevent validation errors.
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Generic Component
Create reusable components that work with multiple data types.
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Interface Definition
Describe object shapes with interfaces for documentation and type checking.
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Literal Union
Restrict values to specific strings or numbers for compile-time validation.
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Props Contract
Specify required and optional properties with their expected types.
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Runtime Validation
Validate data at runtime to ensure it matches expected schemas.
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Schema Validation
Use libraries like Zod, Yup, or JSON Schema to validate data against schemas.
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Type Guard
Write functions that narrow types at runtime for safe type assertions.
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Utility Type
Leverage built-in or custom utility types to transform and manipulate types.
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