Microsoft's Typed JavaScript Superset

Master TypeScript

Type Safety TS 5.x · 2025

Microsoft's open-source JavaScript superset that adds static typing. Now mandatory at Google, Microsoft, Airbnb, and Slack. Catch 15-38% of production bugs at compile time, unlock IDE superpowers, and write more maintainable code.

Type Annotations Interfaces Generics Enums Decorators tsconfig React+TS Node+TS Utility Types Strict Mode

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TypeScript — Type System

// JavaScript — no safety
function greet(user) {
  return user.name.toUpperCase()
  // 💥 Runtime crash if user is null
}
 
// TypeScript — type-safe
interface User { name: string; age: number; }
function greet(user: User): string {
  return user.name.toUpperCase()
} // ✓ Compile-time safe

Modules

TS 5.x complete

65 hrs

Duration

Project-based

Type-Safe

Coding

Catch bugs early

Cert

Included

Industry recognised

24/7

Support

Expert guidance

What You Master

The Complete TypeScript Skill Set

🔷

Type System Foundations

Type annotations, type inference, union types, intersection types, literal types, type narrowing with typeof/instanceof, discriminated unions, and the never and unknown types — master TypeScript's type system from the ground up.

string | numberunknownneveras constsatisfies

📋

Interfaces & Types

interface vs type alias, optional/readonly properties, index signatures, extending interfaces.

🧬

Generics

Generic functions, interfaces, constraints (extends), conditional types, and the infer keyword.

78%

of JavaScript developers now use TypeScript — it's no longer optional for professional work.

🛠️

Utility Types

Partial, Required, Readonly, Pick, Omit, Record, ReturnType — the built-in type helpers.

⚛️

TypeScript with React & Node.js

React.FC, event typing, prop interfaces, generic components, Express type safety, Prisma (full-TS ORM), and ts-jest for testing.

interface Props {
 user: User
 onSave: () => void
}
const C: FC<Props> = ...

🎯

Decorators

Class, method, property decorators — patterns used in Angular, NestJS, and TypeORM.

⚙️

tsconfig & Tooling

tsconfig.json options, path aliases, strict mode, declaration files (.d.ts), @types packages.

TypeScript 5.x Latest Features

Advanced Patterns & Ecosystem

Template literal types, branded types, recursive types, const type parameters, tRPC for type-safe APIs, and migrating an existing JavaScript project to TypeScript.

Why TypeScript

Why TypeScript is Now Required at Top Companies

Google, Microsoft, Airbnb, Slack, and Lyft all require TypeScript. Studies show TypeScript prevents 15-38% of production bugs before the code even runs. It's the professional standard for JavaScript development.

Mandatory at Top Companies

Google, Microsoft, Airbnb, Slack, and Lyft all require TypeScript in their codebases.

Catch 15-38% of Bugs Early

TypeScript prevents bugs at compile time before code reaches production or users.

IDE Superpowers

Autocomplete, inline docs, safe refactoring — TypeScript makes VS Code extraordinary.

JavaScript Superset

Any valid JavaScript is valid TypeScript — gradual adoption with zero breaking changes.

Angular & NestJS First

Both Angular and NestJS are TypeScript-first — TS knowledge makes you better at both.

Curriculum

13-Module TypeScript Mastery Programme

What is TypeScript & its benefits
TypeScript vs JavaScript comparison
Install TypeScript: npm, ts-node
tsconfig.json: key compiler options
First .ts file & tsc compilation

Type annotations: explicit vs inferred
Primitive types: string, number, boolean
Special types: any, unknown, void, never
Null & undefined: strict null checks
Type assertions with as & ! operator

Union types (A | B) & intersection (A & B)
Literal types & template literal types
Type narrowing: typeof, instanceof, in
Discriminated unions pattern
The never type for exhaustiveness

Defining & implementing interfaces
Optional (?), readonly properties
Index signatures for dynamic keys
Extending interfaces & declaration merging
interface vs type alias: when to use each

Typed function parameters & return types
Optional & default parameters
Rest parameters with types
Function overloading with signatures
this type & function types

Generic functions & type inference
Generic interfaces & classes
Constraints with extends keyword
Default type parameters
Conditional types & the infer keyword

Class syntax: properties, constructors
Access modifiers: public, private, protected, readonly
Abstract classes & abstract methods
Implementing interfaces
Parameter properties shorthand

Enabling experimentalDecorators
Class decorators
Method & property decorators
Decorator factories & composition
Angular and NestJS decorator patterns

Partial<T>, Required<T>, Readonly<T>
Pick<T, K> & Omit<T, K>
Record<K, V> & Extract/Exclude
ReturnType<T>, InstanceType<T>, Awaited<T>
Creating custom utility types

ES modules in TypeScript
ambient declarations & .d.ts files
@types packages from DefinitelyTyped
Module augmentation & merging
Path aliases in tsconfig.json

React.FC vs function component typing
Typing props with interface
useState, useRef, useEffect types
Generic components
Event types & handler typing

tsconfig for Node.js projects
Express with TypeScript
Prisma as full-TypeScript ORM
Testing with Jest + ts-jest
Building & running compiled output

Branded types for domain modelling
Template literal type manipulation
Recursive types
Migrating JS project to TS: strategy
TypeScript 5.x new features

Course Snapshot

13 Modules

TS 5.x complete

65+ Hours

Total learning

Download Available

Offline access

Certificate

On completion

Tech Support

Call / WhatsApp

Mon–Fri

9 AM – 6 PM

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Have Questions?

Chat with our TypeScript experts instantly.

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Career Outcomes

TypeScript = Higher Salaries

Job listings that specify TypeScript pay 15-25% more than equivalent JavaScript positions. TypeScript + React is the single highest-paying frontend combination in the current market.

Microsoft

TS creators

Google

Mandated TS

Airbnb

TS codebase

Slack

TS adoption

TypeScript Developer

Write type-safe JavaScript for any web application.

₹7–20 LPA

Angular Developer

Angular is TypeScript-first — TS is required, not optional.

₹8–22 LPA

React/TS Developer

React + TypeScript is the top frontend job combination.

₹8–24 LPA

Full Stack TypeScript

tRPC, Next.js, Prisma — type-safe end to end.

₹10–28 LPA

NestJS Backend Developer

TypeScript-first Node.js framework for enterprise APIs.

₹9–26 LPA

78%

JS devs use TypeScript

Most loved language

₹7–45L

Salary range

TS 5.x

Microsoft backed