Layer 2: Data Shapes in Motion Demo
Demonstrating validated, transformed data shapes
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React Server Components represent a paradigm shift in how we think about component architecture. They allow us to fetch data directly in components...
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One of the most common bugs in Next.js applications involves Date objects. You fetch data from an API, the API returns an ISO string, you parse it...
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User input is the wild west of data sources. Users will send empty strings, nulls, malformed JSON, SQL injection attempts, and everything in between....
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TypeScript provides excellent compile-time type safety, but it disappears at runtime. When you fetch data from an external API, TypeScript assumes...
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Every field you send from server to client costs bytes, parsing time, and memory. Do your client components really need the full blog post body, or...
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Data shapes aren't just about correctness—they're about security. When you transform data at the API boundary, you have an opportunity to filter...
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When shape mismatches reach production, they manifest as cryptic errors: 'undefined is not a function', 'Cannot read property of undefined', or...
BOUNDARY 3: This form demonstrates validation at the user input boundary. Try submitting with invalid data to see Zod validation in action.
API → Server
Validate external data with Zod, transform to internal shape
Server → Client
Ensure all props are JSON-serializable (no Date objects)
Form → Server Action
Validate user input before executing business logic