Seriously! TypeScript — From Type Design to Type-Level Programming

This is the practical application section of "Introduction to TypeScript - From Basics to Practice". If you haven't taken the introductory course, please start with the introductory section first 😄

You will learn about what a node is, the latest JavaScript grammar, the node API, npm, the module system, databases, testing, and more. You will create a project using five practical examples. You will also deploy a service to the cloud and convert a node project to TypeScript.

Build and deploy community applications using the MERN Stack (MongoDB, Express, React, Node + Firebase)

This is a full-stack restaurant map tutorial that allows you to learn everything from front-end, back-end, Kakao Map API usage, and deployment all at once while creating a restaurant map of your favorite YouTuber.

How are you using TypeScript, the standard of Node.js? If you only add type annotations, it is not real TypeScript. I prepared everything because I don't know what you will like. Let's learn TypeScript A to Z :)

In this course, you will learn about TypeScript.

🌟 From the basics of JavaScript to advanced levels, start with the Real! JavaScript course! 🌟

If you’ve learned React, it’s time to apply TypeScript to a real-world project. Build a TodoList app from scratch, applying types to components and state, and gain practical React + TypeScript development skills by implementing CRUD functionality, storing data in LocalStorage, and deploying the app.

This is a course where you will build a map service from scratch using the MERN stack (feat. TypeScript). Let's build it step-by-step while following the official API documentation.

I recommend this to those who want to learn how to easily create and distribute Android apps, Windows apps, and iOS apps. We will teach you the basics of TypeScript rather than JavaScript and Angular!

Hello, I am Gamja, a 4th-year frontend developer. Thinking back to when I first learned JavaScript, I remember many times when I felt like I understood everything while following along with YouTube videos or books, but my mind would go completely blank the moment I opened an empty editor. At first, I was just busy copying and pasting code I found through Googling. Because of that, when an error occurred, I didn't know where to start fixing it, and I would spend several days staying up all night in frustration. That’s when I realized a painful truth: writing one line of code yourself while understanding the principles is more valuable for your actual skills than copying someone else's code 100 times. Many beginners struggle with these concerns in front of the high wall of JavaScript: 🚨 "I made the screen look pretty with HTML/CSS, but I feel lost trying to make it move." 🚨 "I've memorized all the syntax for variables and functions, but I don't know how to combine them in practice." 🚨 "My head hurts just hearing terms like event bubbling or DOM manipulation." That is why I prepared this course. I have organized only the 'surest shortcuts' that I learned through countless trials and errors. While preparing the materials, I didn't list difficult development jargon. I boldly discarded the grammar found in thick textbooks that you won't even use right away. Instead, I will plant the core principles used in practice as naturally as breathing into your mind through intuitive everyday metaphors like 'conveyor belts' and 'paint palettes.' In this course, you won't just learn theory. As soon as you learn the theory, you will build four core UIs that you will inevitably encounter in frontend work—such as accordions, tab menus, and dark mode toggles—from scratch with me. After completing the course, you will no longer be someone who scrapes someone else's code and presses the run button while praying. You will be reborn as a real frontend developer who can design how to structure a screen on your own and write JavaScript code according to your intentions. I have included all of my practical know-how. Don't stop in front of an empty editor anymore. It's time to get started.

After studying JavaScript, starting TypeScript often leads to getting stuck on the question, "Why should I use these types?" rather than the new syntax itself. This course covers everything from basic types to unions, type narrowing, generics, keyof, Pick, and Omit in a connected learning path. Additionally, practice problems are provided as separate missions so you can directly apply what you've learned. After completing the course, you will be able to understand the causes of type errors instead of blindly hiding them, safely reduce repetitive types, and express the intent of your code through types.

If you’ve learned JavaScript, take your skills to the next level with TypeScript. Build a solid foundation in the TypeScript essentials needed for modern frontend development with React, Next.js, and more through hands-on practice covering basic types and type inference, interfaces, function types, generics, utility types, and more.

This lecture is a lecture on the backend part of the [Web Development Full Stack Course] lecture series for training full-stack web developers. This lecture is based on the contents of the instructor's book <A Week Before Investing in a Node.js Project>.

This course is designed for developers who already have experience with programming languages (such as Java, Python, Swift, Kotlin, etc.) to quickly master JavaScript in just one hour. In an era of coding with AI, human developers must still supervise AI-generated code. This course is intended to help you rapidly build the essential knowledge required for that supervision.

This course is a practical, hands-on guide for those who want to learn how to maximize development productivity in the AI era. Beyond simply learning how to use AI, we focus on how to utilize Claude Code in a real-world development environment and how to produce "proper results." Many developers use AI but still face issues such as: ❌ Inconsistent results ❌ Poor code quality ❌ Increasing project complexity To solve these problems, this course teaches you how to utilize AI as a "development partner" rather than just a tool through: ✔ Spec-based workflows ✔ Structured command systems ✔ Sub-agent and automation strategies Furthermore, you will gain the experience of completing and deploying a full application from start to finish by integrating with real-world services such as Firebase, Figma, GitHub, and Vercel.

It covers machine learning concepts within the JavaScript environment. It covers the patterns and code for implementing machine learning with JavaScript and TensorFlow.js.

Even today, as modern technologies like React have become widespread, jQuery remains a technology you will still encounter when operating and maintaining existing websites and in web publishing work. Rather than simply recreating flashy effects, you will learn the principles and fundamentals of how jQuery works, progressing step by step from events and animations to a variety of UI interactions. Complete your portfolio through hands-on practice and develop practical web publishing skills that you can apply in the workplace.

If you’ve ever had trouble determining whether the quality of responses declined after changing a prompt or model while building a service using an LLM, this course may be the solution. You’ll learn how to create your own evaluation criteria and automatically identify responses that have changed.

The JS Core Theory and Practical Examples textbook and completed version for web publishers is a lecture manual produced in PDF format. This textbook serves to help web publishers thoroughly master the fundamentals of JavaScript and jQuery that they must know. A key feature of this manual is that it allows you to solidify theory through "Small Missions" connected to each concept. In particular, it is a well-prepared textbook that includes practical examples utilizing all the theories learned. The total PDF spans over 320 pages covering both Vanilla JavaScript and jQuery, with Coding Works adding sufficient explanations to ensure easy understanding. Notably, it allows publishers to learn essential practical jQuery interaction examples required for website production.