TypeScript Foundation
The strictest React TypeScript base available. Zero compromises on type safety.
React 18Next.js 14TypeScriptZod
$197one-time
100/100 LHPreview →
Deloryen Studio
React TypeScript Templates
TypeScript in a React project exists on a spectrum from nominal annotations that technically compile to genuinely strict type safety that prevents runtime errors before they reach production. Most React TypeScript templates lean heavily toward the nominal end — .tsx files with implicit any sprinkled throughout, untyped API routes, and environment variables accessed directly from process.env without validation. Deloryen React TypeScript templates are at the strict end. Every file is typed. Every API route has typed request parameters and response schemas validated with Zod. Environment variables are validated at build time with @t3-oss/env-nextjs — a missing variable causes a build error, not a silent runtime failure. Path aliases are configured in tsconfig.json. This is TypeScript that works for you, not TypeScript that satisfies a checkbox.
- 100% TypeScript — zero .jsx files
- strict: true in tsconfig.json
- Zod validation on all API routes
- @t3-oss/env-nextjs for env validation
- Typed database queries (Prisma or Drizzle)
- Component prop interfaces fully documented
- Type-safe fetch utilities with generics
- Path aliases: @/components, @/lib, @/types
Available Templates
TypeScript SaaS
Fully typed SaaS template. Stripe, auth, Prisma, all with complete type coverage.
React 18Next.js 14TypeScriptPrismaStripe
$347one-time
97/100 LHPreview →
TypeScript Agency
Agency template with 100% TypeScript. Documentation covers every type decision.
React 18Next.js 14TypeScriptTailwind
$197one-time
98/100 LHPreview →
What Every Template Includes
Production Standards. Not Marketing Claims.
| Specification | Other Marketplaces | Deloryen Studio |
|---|---|---|
| Lighthouse Performance | 62–74 | 95–100 |
| Next.js Architecture | Pages Router common | App Router only |
| TypeScript Coverage | Partial or absent | 100% strict mode |
| CSS System | Bootstrap (200kb+) | Tailwind (10kb purged) |
| Structured Data | Rarely included | Every page |
| GEO Optimization | None | Built-in |
| Performance Guarantee | None | Documented + testable |
| License | Complex, tiered | Clear commercial terms |
FAQ
Frequently Asked Questions
What strict TypeScript settings are enabled?
+
strict: true in tsconfig.json enables strictNullChecks, noImplicitAny, strictFunctionTypes, strictPropertyInitialization, strictBindCallApply, and all other strict checks. These settings prevent the most common categories of React runtime errors at compile time.
How are environment variables typed in these React TypeScript templates?
+
@t3-oss/env-nextjs validates all environment variables at build time using Zod schemas. Accessing an undefined environment variable causes a build failure with a clear error message — not a silent undefined at runtime.
Are the API routes typed end-to-end?
+
Yes. Every API route has typed request body validation with Zod, typed response schemas, and TypeScript error handling. Client-side fetch utilities use generics so the response type is inferred automatically.
Is TypeScript coverage verified before release?
+
Yes. tsc --noEmit is run as part of the build process. Templates do not ship with TypeScript errors or warnings suppressed via @ts-ignore or any casts.
Your move