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Zod Schema Validation

⬢ 層級 2技術
高
薪資影響
2 個月
學習時長
中等
難度
12
職業
一覽

Zod is a lightweight schema validation library for TypeScript. Define your data shapes as schemas (`z.object`, `z.string`, `z.number`), then validate unknown data. Used to validate API requests, form inputs, database results, configuration files. Key differentiator: TypeScript inference (types flow from schemas, not vice versa). Takes 1-2 weeks to master. Sits between manual validation (error-prone) and heavier validators (yup, joi, ajv) as the modern TypeScript default.

什麼是 Zod Schema Validation

Zod is a TypeScript-first data validation library. You define schemas describing your data shapes, then validate runtime data against those schemas. Zod infers TypeScript types from schemas automatically, your types and validation always stay in sync. Key use cases: validating API request bodies, form inputs, environment variables, configuration files, and database results. Zod catches invalid data early with clear error messages.

🔧 工具與生態
Zod libraryTypeScriptSchema compositionError messagesTransformationsCustom validatorsCoercionAsync validation

📋 開始之前

Typescript Advanced

💰 各地區薪資

地區初級中級高級
USA$85,000$140,000$195,000
UK£48,000£85,000£125,000
EU€52,000€90,000€130,000
CANADACA$78,000—CA$180,000

❓ 常見問題

Why use Zod instead of TypeScript interfaces?
TypeScript interfaces are compile-time only. Zod validates at runtime, catching invalid data from APIs, forms, files. You need both: Zod for validation, TypeScript for type safety.
Is Zod slower than manual validation?
Zod is faster than hand-written validators. For performance-critical paths, Zod is negligible overhead (<1ms per request).
Can I transform data with Zod?
Yes. Use `.transform()` to coerce/modify data during validation. e.g., validate and convert string dates to Date objects.
Does Zod support async validation?
Yes. Use `.refine()` or `.superRefine()` for async validation (check database, call APIs during validation).
Can I reuse schemas?
Yes. Compose schemas: define base schemas, extend them, combine them. Reuse is core to Zod's design.

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