TypeScript in 30 Days

TypeScript in 30 Days is a software engineering product available on the Whop marketplace, created by CODE30 - LEARN PROGRAMING IN JUST 30 DAYS and launched in September 2026.

250 pages · 30 days · 70–110 min/day Learn how TypeScript makes JavaScript safer, clearer, and easier to maintain. This course explains why TypeScript exists before introducing types, so you understand the problems it solves instead of memorizing syntax. You’ll learn type inference, primitive types, arrays, tuples, unions, literal types, aliases, interfaces, narrowing, classes, generics, utility types, modules, DOM typing, async code, and TypeScript configuration. Compiler errors are explained as part of the learning process so you learn how to understand and fix them. Included: 250-page PDF, 30-day roadmap, JavaScript-to-TypeScript comparisons, compiler-error explanations, exercises, debugging, quizzes, projects, and full solutions. Final project: Build a fully typed task-management application using interfaces, generics, modules, and async data. Prerequisite: Basic JavaScript is recommended.

TypeScript in 30 Days has is priced at $19.99 (one-time payment).

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