Intermediate · 5 weeks · 30 hours
TypeScript Course
Types, generics and safe refactoring techniques for teams maintaining large JavaScript codebases.
- Available as classroom
- Available as live online
- Available as corporate on-site
TypeScript Course at Wisen IT Solutions, Chennai
The TypeScript Course at Wisen IT Solutions, Chennai is built for developers who already write JavaScript and want the compiler working for them. You learn to model real domains with the type system, adopt TypeScript incrementally in an existing codebase, and refactor without fear.
The course runs for 5 weeks · 30 hours and is delivered as classroom, live online, corporate on-site training by Wisen IT Solutions, Chennai. You can join a scheduled batch or ask for a private batch for your team.
Course curriculum
TypeScript Course syllabus — types, generics and safe refactoring
The TypeScript Course syllabus builds from inference and narrowing up to generics, project configuration and the refactoring workflows large codebases rely on.
Introduction and Setup
- What TypeScript adds to JavaScript
- Static typing against runtime behaviour
- Installing the compiler and running tsc
- Your first typed file
- How type erasure works at build time
- The relationship between .ts and .js output
- Editor integration and inline diagnostics
- The TypeScript playground for experiments
- Type annotations and where they go
- Type inference and letting the compiler work
- const versus let and literal widening
- any and why it defeats the purpose
- unknown as the safe alternative to any
- never and unreachable code
- void and functions that return nothing
- Reading a TypeScript error message
- Common beginner errors and their fixes
- Compiling a small project end to end
- Watch mode and incremental builds
- Running TypeScript with Node
- Adding TypeScript to an existing project
- Migration strategy: file by file
Outcomes
What you will be able to do after the TypeScript Course
Outcomes are stated as capabilities, not topics covered, so you can judge the course against what you actually need at work.
By the end of the course you can
- Model domains precisely with unions, intersections and discriminated unions
- Write generic functions and components that stay readable
- Configure strict compiler options and understand each error you see
- Type third-party libraries and author declaration files
- Migrate a JavaScript codebase to TypeScript file by file
- Use the type system to make invalid states unrepresentable
Syllabus
What the TypeScript Course covers
5 modules across 5 weeks · 30 hours. The first module is expanded; open any module to read its topics.
01Foundations
- Structural typing and type inference
- Primitives, literals, unions and narrowing
- tsconfig and the strict family of flags
02Modelling Real Domains
- Interfaces, type aliases and when to use each
- Discriminated unions and exhaustiveness checking
- Readonly data and immutability at the type level
03Generics and Utility Types
- Generic functions, constraints and defaults
- Built-in utility types and how they are implemented
- Conditional and mapped types in moderation
04Working with the Ecosystem
- Declaration files and DefinitelyTyped
- Typing HTTP responses and validating at the boundary
- TypeScript with React, Angular and Node
05Migration and Maintenance
- Incremental adoption strategies for live codebases
- Eliminating `any` safely with `unknown` and guards
- Type-aware linting and CI enforcement
Who it is for
Is the TypeScript Course the right fit for you?
Read this before enrolling. If none of the profiles below describe you, contact us and we will point you to a better-suited course.
This course suits
- JavaScript developers adopting TypeScript at work
- Teams migrating an existing codebase incrementally
- Frontend engineers working in Angular, React or Next.js
Answers
TypeScript Course — frequently asked questions
Answers to the questions we are asked most often about the TypeScript Course.
What should I know before taking the TypeScript Course?
You need working knowledge of modern JavaScript, including functions, objects, modules and promises. The course focuses on the type system rather than re-teaching the language.
Does the course cover migrating an existing JavaScript project?
Yes. A dedicated module covers incremental adoption, removing `any` safely, typing third-party libraries and enforcing type checks in continuous integration.
Is the course tied to a specific framework?
No. The core content is framework-neutral, with applied sections showing TypeScript in React, Angular and Node.js projects.
- 27+
- Years of training
Delivering technical training from Chennai since 1998. - 17,700+
- Learners empowered through training
Corporate teams, IT working professionals, career switchers and students. - 2,700+
- Happy students / year
Learners completing our programmes every year. - 30+
- Corporate clients
Product companies, service firms and startups.
Corporate training
Teams that train with Wisen IT Solutions, Chennai
Engineering teams across product companies, IT services firms and startups run their JavaScript, Angular, React and Next.js upskilling with us.
Altimetrik 
Aparajitha Corporate Services 
Caresoft 
Dzine Hub 
Firstsource 
Gigamon 
Helios and Matheson 
NextGen Healthcare 
Perpetuuiti Technosoft 
R Systems 
SRM Institute of Science and Technology 
Temenos 
The Hindu 
Tamil Nadu Electricity Board 
WABCO
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Plan your JavaScript training with Wisen IT Solutions, Chennai, India
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