A warm welcome to the TypeScript: Build Scalable and Robust Applications course by Uplatz.

TypeScript is a superset of JavaScript that adds static typing to the language. This means that you can define the types of variables, functions, and other entities in your code, which allows the TypeScript compiler to catch type errors before your code is even run.

TypeScript acts as a powerful tool that helps you write safer, more maintainable code by catching type errors before they reach runtime. The end result is still JavaScript code that can be executed anywhere JavaScript is supported.

How TypeScript Works

TypeScript works by adding a layer of static typing on top of JavaScript. The process works as follows:

1. Writing TypeScript Code

• You write your code using TypeScript syntax, which includes type annotations. These annotations specify the expected data types for variables, functions, and other elements in your code.

You write your code using TypeScript syntax, which includes type annotations. These annotations specify the expected data types for variables, functions, and other elements in your code.

2. Compilation (Transpilation)

• The TypeScript compiler (tsc) takes your TypeScript code and converts it into standard JavaScript code. This process is called transpilation because it transforms the code from one version of JavaScript (with types) to another (without types).

• During compilation, the TypeScript compiler performs type checking. It analyzes your code to ensure that the types are used consistently and that there are no type errors. If it finds errors, it will report them, preventing you from generating the JavaScript output until you fix them.

The TypeScript compiler (tsc) takes your TypeScript code and converts it into standard JavaScript code. This process is called transpilation because it transforms the code from one version of JavaScript (with types) to another (without types).

During compilation, the TypeScript compiler performs type checking. It analyzes your code to ensure that the types are used consistently and that there are no type errors. If it finds errors, it will report them, preventing you from generating the JavaScript output until you fix them.

3. Running the JavaScript Code

• The JavaScript code generated by the compiler can be run in any JavaScript environment, such as a web browser or Node.js. Since the types are removed during compilation, the JavaScript runtime doesn't need to understand TypeScript's type system.

The JavaScript code generated by the compiler can be run in any JavaScript environment, such as a web browser or Node.js. Since the types are removed during compilation, the JavaScript runtime doesn't need to understand TypeScript's type system.

Key Concepts

• Static Typing: TypeScript's core feature. It allows you to define the types of variables, functions, and other entities. This helps catch type errors early in development.

• Type Annotations: You explicitly specify the types of your variables and functions using a specific syntax (e.g., let name: string = "Alice";).

• Type Inference: TypeScript can often infer types automatically, even if you don't explicitly write them. This reduces the amount of code you need to write.

• Compiler: The tsc compiler is responsible for converting TypeScript code to JavaScript and performing type checking.

• Transpilation: The process of converting TypeScript code to JavaScript.

Static Typing: TypeScript's core feature. It allows you to define the types of variables, functions, and other entities. This helps catch type errors early in development.

Type Annotations: You explicitly specify the types of your variables and functions using a specific syntax (e.g., let name: string = "Alice";).

Type Inference: TypeScript can often infer types automatically, even if you don't explicitly write them. This reduces the amount of code you need to write.

Compiler: The tsc compiler is responsible for converting TypeScript code to JavaScript and performing type checking.

Transpilation: The process of converting TypeScript code to JavaScript.

TypeScript brings a lot to the table, making it a popular choice for modern web development. Some of its key features are:

• Static Typing: This is the heart of TypeScript. It lets you define the types of variables, functions, and other elements in your code. This helps catch type errors during development, before they cause problems at runtime.

• Type Inference: TypeScript is smart enough to often figure out types even if you don't explicitly write them. This makes your code less verbose while still providing the benefits of typing.

• Interfaces: These define the "shape" of objects, specifying what properties and methods they should have. They help ensure that different parts of your code work together smoothly.

• Classes: TypeScript supports object-oriented programming with classes, allowing you to create reusable blueprints for objects with properties and methods.

• Generics: These allow you to write code that can work with a variety of types without sacrificing type safety. This is especially useful for creating reusable components and functions.

• Enums: Enums provide a way to define a set of named constants, making your code more readable and maintainable.

• Decorators: These are a way to add extra functionality to classes, properties, methods, and accessors. They can be used for things like logging, dependency injection, and more.

• Modules and Namespaces: These help you organize your code into logical units, making it easier to manage and maintain large projects.

• Tooling: TypeScript has excellent tooling support, including features like code completion, refactoring, and debugging in your IDE.

• Compatibility: TypeScript compiles down to regular JavaScript, so it works seamlessly with existing JavaScript libraries and frameworks.

Static Typing: This is the heart of TypeScript. It lets you define the types of variables, functions, and other elements in your code. This helps catch type errors during development, before they cause problems at runtime.

Type Inference: TypeScript is smart enough to often figure out types even if you don't explicitly write them. This makes your code less verbose while still providing the benefits of typing.

Interfaces: These define the "shape" of objects, specifying what properties and methods they should have. They help ensure that different parts of your code work together smoothly.

Classes: TypeScript supports object-oriented programming with classes, allowing you to create reusable blueprints for objects with properties and methods.

Generics: These allow you to write code that can work with a variety of types without sacrificing type safety. This is especially useful for creating reusable components and functions.

Enums: Enums provide a way to define a set of named constants, making your code more readable and maintainable.

Decorators: These are a way to add extra functionality to classes, properties, methods, and accessors. They can be used for things like logging, dependency injection, and more.

Modules and Namespaces: These help you organize your code into logical units, making it easier to manage and maintain large projects.

Tooling: TypeScript has excellent tooling support, including features like code completion, refactoring, and debugging in your IDE.

Compatibility: TypeScript compiles down to regular JavaScript, so it works seamlessly with existing JavaScript libraries and frameworks.

TypeScript - Course Curriculum

Module 1: Introduction to TypeScript

Introduction to TypeScript

• What is TypeScript?

• Why should we learn TypeScript?

• TypeScript vs JavaScript

What is TypeScript?

Why should we learn TypeScript?

TypeScript vs JavaScript

Setting Up TypeScript Environment

• Installing TypeScript

• Writing your first TypeScript program

• Understanding the TypeScript project structure

• Configuring tsconfig.json

Installing TypeScript

Writing your first TypeScript program

Understanding the TypeScript project structure

Configuring tsconfig.json

Module 2: TypeScript Basics

Basic TypeScript Syntax

• Primitive types (string, number, boolean, etc.)

• Explicit vs inferred types

Primitive types (string, number, boolean, etc.)

Explicit vs inferred types

Complex Types

• Arrays, Tuples, and Enums

• Union and Intersection types (with examples)

Arrays, Tuples, and Enums

Union and Intersection types (with examples)

Advanced TypeScript Types

• Interfaces and Type Aliases

• Default values, unions, and intersections

Interfaces and Type Aliases

Default values, unions, and intersections

Type Assertions, Function Types, and Generics

• Type assertions

• Function types

• Introduction to Generics

Type assertions

Function types

Introduction to Generics

Module 3: Object-Oriented TypeScript

Working with Classes and Objects

• Creating classes and objects

• Access modifiers (public, private, protected)

• Readonly properties

Creating classes and objects

Access modifiers (public, private, protected)

Readonly properties

Advanced Class Features

• Getters and setters

• Static properties and methods

• Abstract classes and inheritance

Getters and setters

Static properties and methods

Abstract classes and inheritance

Object-Oriented Programming in TypeScript

• Implementing OOP principles

• Hands-on project

Implementing OOP principles

Hands-on project

Module 4: TypeScript Modules and Integration

Understanding TypeScript Modules

• Organizing and using modules

• Importing and exporting

Organizing and using modules

Importing and exporting

Integrating TypeScript with JavaScript Frameworks

• Using TypeScript with React and Node.js

Using TypeScript with React and Node.js

Declaration Files and Frontend Tooling

• Using declaration files (.d.ts)

• Working with frontend tools like Webpack and Babel

Using declaration files (.d.ts)

Working with frontend tools like Webpack and Babel

Module 5: TypeScript Utilities and Features

Useful TypeScript Utilities

• Utility types (Partial, Readonly, Record, etc.)

• Best practices

Utility types (Partial, Readonly, Record, etc.)

Best practices

Function Types and Overloading

• Function signatures

• Overloading functions

Function signatures

Overloading functions

Deep Dive into TypeScript Classes and Inheritance

• Extending classes

• Using mixins

Extending classes

Using mixins

Exploring Access Modifiers and Readonly Properties

• Real-world examples

Real-world examples

Module 6: Hands-on TypeScript Projects

Building a Modular Application

• Structuring a scalable TypeScript app

Structuring a scalable TypeScript app

Building a Type-Safe Library

• Creating a library with strict typing

Creating a library with strict typing

TypeScript with Angular

• Setting up an Angular project with TypeScript

Setting up an Angular project with TypeScript

Using TypeScript with Vue.js

• Developing a Vue.js project with TypeScript

Developing a Vue.js project with TypeScript

Module 7: Error Handling, Debugging, and Compilation

Error Handling in TypeScript

• Catching and managing errors

• Debugging TypeScript code

Catching and managing errors

Debugging TypeScript code

Understanding TypeScript Compiler Options

• Exploring tsc options

Exploring tsc options

Module 8: Advanced TypeScript Concepts

Working with TypeScript Mixins

• Creating reusable mixins

Creating reusable mixins

Building a Notification System using Mixins

• Hands-on project

Hands-on project

Exploring TypeScript Decorators

• Class, method, and property decorators

Class, method, and property decorators

Advanced Generics in TypeScript

• Conditional types and mapped types

Conditional types and mapped types

Module 9: Full-Stack TypeScript Development

Building a REST API with TypeScript

• Setting up an Express.js backend with TypeScript

Setting up an Express.js backend with TypeScript

Creating Endpoints and Handling Requests

• CRUD operations

CRUD operations

Setting Up a TypeScript Frontend Project

• Configuring a frontend app

Configuring a frontend app

State Management with TypeScript

• Using Vanilla TypeScript, Context API, and Redux

Using Vanilla TypeScript, Context API, and Redux

TypeScript Routing

• Handling navigation with React Router

Handling navigation with React Router

API Integration with TypeScript

• Using Axios with TypeScript

Using Axios with TypeScript

Unit Testing in TypeScript

• Testing with Jest

Testing with Jest

Preparing for Production and Deployment

• Best practices for production-ready TypeScript apps

Best practices for production-ready TypeScript apps

Module 10: TypeScript for Mobile Development

Why Use TypeScript with React Native?

• Benefits of TypeScript in mobile apps

Benefits of TypeScript in mobile apps

Creating a React Native Project with TypeScript

• Step-by-step guide using Expo

Step-by-step guide using Expo

Module 11: TypeScript Namespaces and Utility Projects

Understanding TypeScript Namespaces

• Organizing code with namespaces

Organizing code with namespaces

Quote Generation Project with TypeScript

• Step-by-step project

Step-by-step project

Blog Post Manager Project

• CRUD operations in TypeScript

CRUD operations in TypeScript

Blog Post Manager with SQLite

• Database integration

Database integration

Building a Password Generator in TypeScript

• Node.js and React implementations

Node.js and React implementations

Module 12: Interview Preparation & Conclusion

Common TypeScript Interview Questions

• Explanation with examples and tables

Explanation with examples and tables

Learning TypeScript can definitely open up some exciting career opportunities. Learning TypeScript can significantly enhance your career prospects in web development, mobile development, and even game development. It's a valuable skill that's in high demand, and it can help you build better, more reliable software. Some of the key areas where TypeScript knowledge is highly valued are:

1. Front-End Development

• TypeScript with React: This is a very popular combination. Many companies use TypeScript with React to build large, complex web applications. Knowing TypeScript can make you a highly sought-after React developer.

• TypeScript with Angular: Angular, a powerful framework by Google, is often used with TypeScript. If you're interested in Angular development, TypeScript is a must-have skill.

• TypeScript with Vue.js: While Vue.js can be used with JavaScript, TypeScript is becoming increasingly popular in the Vue.js ecosystem, especially for larger projects.

• General Front-End Roles: Even if a company doesn't explicitly mention TypeScript, knowing it can give you an edge in front-end developer roles. It demonstrates your commitment to writing high-quality, maintainable code.

TypeScript with React: This is a very popular combination. Many companies use TypeScript with React to build large, complex web applications. Knowing TypeScript can make you a highly sought-after React developer.

TypeScript with Angular: Angular, a powerful framework by Google, is often used with TypeScript. If you're interested in Angular development, TypeScript is a must-have skill.

TypeScript with Vue.js: While Vue.js can be used with JavaScript, TypeScript is becoming increasingly popular in the Vue.js ecosystem, especially for larger projects.

General Front-End Roles: Even if a company doesn't explicitly mention TypeScript, knowing it can give you an edge in front-end developer roles. It demonstrates your commitment to writing high-quality, maintainable code.

2. Full-Stack Development

• Node.js Backends: TypeScript can be used on the server-side with Node.js. This allows you to build full-stack applications with a consistent language and type system across the front-end and back-end.

• Improved Code Quality: Whether you're using Node.js or another back-end technology, TypeScript can help you write better code for your APIs and server-side logic.

Node.js Backends: TypeScript can be used on the server-side with Node.js. This allows you to build full-stack applications with a consistent language and type system across the front-end and back-end.

Improved Code Quality: Whether you're using Node.js or another back-end technology, TypeScript can help you write better code for your APIs and server-side logic.

3. Mobile Development

• React Native: If you're interested in building mobile apps with React Native, TypeScript can be a valuable asset. It helps you catch errors early and improve the maintainability of your mobile code.

React Native: If you're interested in building mobile apps with React Native, TypeScript can be a valuable asset. It helps you catch errors early and improve the maintainability of your mobile code.

4. Game Development

• Game Engines: Some game engines support TypeScript, allowing you to use it for game logic and scripting.

Game Engines: Some game engines support TypeScript, allowing you to use it for game logic and scripting.

5. Other Roles

• Technical Lead/Architect: As you gain experience with TypeScript, you can move into more senior roles like technical lead or architect, where you'll be responsible for making technical decisions and guiding teams.

• Open Source Contributor: Contributing to open-source projects that use TypeScript can be a great way to improve your skills and build your portfolio.

Technical Lead/Architect: As you gain experience with TypeScript, you can move into more senior roles like technical lead or architect, where you'll be responsible for making technical decisions and guiding teams.

Open Source Contributor: Contributing to open-source projects that use TypeScript can be a great way to improve your skills and build your portfolio.

Why TypeScript is in Demand

• Scalability: TypeScript is excellent for building large, complex applications that need to be maintained and scaled over time.

• Maintainability: The static typing in TypeScript makes it easier to understand and refactor code, which is crucial for long-term projects.

• Reduced Errors: TypeScript helps catch errors early in the development process, reducing the number of bugs that make it into production.

• Improved Developer Productivity: With better tooling and error checking, developers can often write code faster and with fewer headaches.

Scalability: TypeScript is excellent for building large, complex applications that need to be maintained and scaled over time.

Maintainability: The static typing in TypeScript makes it easier to understand and refactor code, which is crucial for long-term projects.

Reduced Errors: TypeScript helps catch errors early in the development process, reducing the number of bugs that make it into production.

Improved Developer Productivity: With better tooling and error checking, developers can often write code faster and with fewer headaches.