Updated June 2026

TypeScript Essentials

Class Duration

2 days of live online training
Comprehensive hands-on development experience

Target Audience

Computer programming professionals
JavaScript experience helpful but not required
Focus on modern web development practices

Description

Embark on a comprehensive journey into the realm of TypeScript with our "TypeScript Essentials" course. Begin by grasping the fundamentals of TypeScript, understanding its relationship with JavaScript, dynamic/static typing, and the immense advantages it offers over pure JavaScript for modern web development. Explore the rich landscape of TypeScript's type system, covering JavaScript types, type assignments, static typing for various data structures, and special types like Any, Unknown, and Never. Delve into advanced typing concepts, including structural and nominal typing, type narrowing, and type guards, enabling you to write robust and error-free code. You'll also master the art of defining and utilizing custom types effectively, from type aliases to utility types and advanced type manipulation techniques such as conditional types and mapped types. As you progress, you'll dive into generic types, learning about type parameters, constraints, and how to create and implement generic classes and functions in TypeScript. To put your newfound knowledge into practice, you'll discover how to seamlessly integrate TypeScript into real-world applications, from bundling with Webpack to using TS-Node and handling ES2015 static modules and ES2020 import/export mechanisms, equipping you to harness TypeScript's power in practical development scenarios. Join us in this course to become a proficient TypeScript developer, ready to tackle complex web projects with confidence and precision.

Learning Objectives

Understand the fundamentals of TypeScript, including its relationship with JavaScript, dynamic/static typing, and the advantages it offers over pure JavaScript.
Explore various typing concepts in TypeScript, such as structural and nominal typing, type narrowing, and type guards.
Master TypeScript's type system, covering JavaScript types, type assignments, static typing of primitives, objects, functions, enums, unions, intersections, nullish values, and special types like Any, Unknown, and Never.
Learn how to define and use custom types effectively, including type aliases, utility types, generic types, and advanced type manipulation techniques like conditional types and mapped types.
Dive into generic types, including type parameters, constraints, and how to create and use generic classes and functions in TypeScript.
Apply TypeScript in real-world applications, including bundling with Webpack, using TS-Node, working with ES2015 static modules, and handling imports and exports in ES2020, enabling you to leverage TypeScript's power in practical development scenarios.

Training Materials

All students receive comprehensive courseware covering all topics in the course. Courseware is distributed via GitHub in the form of documentation and extensive code samples. Students practice the topics covered through challenging hands-on lab exercises.

Software Requirements

Students will need a free, personal GitHub account to access the courseware. Student will need permission to install Node.js and Visual Studio Code on their computers. Also, students will need permission to install NPM Packages and Visual Studio Code extensions. If students are unable to configure a local environment, a cloud-based environment can be provided.

Training Topics

TypeScript Fundamentals and Setup

What is TypeScript?
JavaScript and TypeScript
Dynamic/Static Typing
Loose/Strong Typing
Limitations of TypeScript
Installing TypeScript
Compiling a Simple Program

Generative AI Tooling (optional)

GitHub Copilot and Visual Studio Code Integration
Using GitHub Copilot for VS Code Programming
Using GitHub Copilot for Terminal Commands
Customize the Course with Your Generative AI Programmer Tool (optional)

Typing Concepts

What is Typing?
- Memory Structure
- Semantic Meaning
Structural Typing
Nominal Typing
- Branding
- Enums
- Private Member
Type Narrowing
Type Guards

Types

JavaScript Types
Rule of First Assignment
Static Typing of Primitives
Static Typing of Objects
Static Typing of Functions
Enum Type
Discriminated Unions
Union and Intersections Types
Nullish Values/Types
Any, Unknown, and Never Types

Defining Types

Type Aliases
Utility Types
TypeOf Operator
KeyOf Operator
Indexed Access Types
Conditional Types
Mapped Types
Template Literal Types

Generic Types

Generic type parameters
Constraints
Inferring type parameters
Passing in type parameters
const type parameters (TS 5.x+)
Generic classes and functions
The satisfies operator

Classical Object-Oriented Programming

Classes
Interfaces
Abstract classes
Access modifiers
Inheritance
Stage 3 Decorators (modern, distinct from legacy experimentalDecorators)

Modern TypeScript Features (TS 6.x)

The using declaration and Symbol.dispose for resource cleanup
await using for async resource cleanup
Type predicates and narrowing
Conditional and template-literal types
infer and recursive types

Using TypeScript for Applications

Bundling with Vite, esbuild, or Rspack (the modern defaults; Webpack covered briefly for legacy projects)
tsx / Node 22+ TypeScript support
ES2025 modules
Named/default exports and imports
JSON modules with import data from "./x.json" with { type: "json" }
ES2020 Dynamic Imports

Practice Application (choose one)

Web App with React
Web App with Angular
REST API with Express.js