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A Solid Front-End Bootcamp for Full-Stack Developers (HTML, CSS, Vanilla JavaScript + ES6) [Full-Stack Part 2]

A full-stack series course aimed at beginners, based on real-world experience developing actual web services, with the goal of building web and app services to a level suitable for actual commercialization. As Part 2 of this series, this course thoroughly covers the latest HTML5, CSS3, and Vanilla JavaScript (Javascript) + ES6, including responsiveness and compatibility, among the many available frontend technologies.

(4.9) 184 reviews

2,798 learners

Level Beginner

Course period Unlimited

HTML/CSS
HTML/CSS
JavaScript
JavaScript
ES6
ES6
HTML/CSS
HTML/CSS
JavaScript
JavaScript
ES6
ES6

Reviews from Early Learners

4.9

5.0

hanyn

100% enrolled

It was good to be able to implement web technologies (slides, etc.) that I saw on actual sites. The path to studying front-end was daunting, but I think I got a feel for it through the lecture. It is a lecture that provides substantial lecture materials to the point where you can hardly feel the limitations of online lectures, and it is a lecture with a well-organized lecture structure and time allocation, so it is easy to concentrate and there is a lot to learn. I think it is a lecture that instills confidence and interest in studying front-end. I will continue to study development in the future using this lecture as a stepping stone and I want to become a developer like Janjaemi Coding someday! Thank you.

5.0

opert93

100% enrolled

It was good to be able to learn the basics of the front-end. I think it would have been more helpful for me to build a solid foundation rather than directly deal with the framework of the front-end. Based on this, I will learn the latest frameworks such as React/Flutter. I am always grateful to the instructor.

5.0

jypark3152

100% enrolled

The course is structured so that even if you don't know anything from the beginning, it's easy to understand because it explains everything from the basics step by step. The lecture length is not too long, so the time allocation is appropriate so that you won't get bored.

What you will gain after the course

  • Build a strong foundation in frontend development with ease

  • Development of responsive, cross-browser web services

  • Detailed Modern HTML and CSS Features

  • VanillaJS (Javascript) with compatibility in mind

  • A complete HTML/CSS/JS+ES6 package for developing the latest commercial services

The official course chosen for in-house training by top tech companies!

Build the fundamentals of frontend web technologies for beginners

A high-quality course series (Full-Stack Part 2)

This course is a Full-Stack Course Series Part 2 course that follows the Python Backend (Part 1) course and teaches the solid frontend fundamentals needed for full-stack development. It provides a detailed overview of and hands-on learning in HTML5, CSS, JavaScript (VanillaJS, vanilla JavaScript), and ES6 for developing web services suitable for commercial use.

Rather than being a typical IT course, this is a special course created with the learner’s perspective in mind as much as possible. Using a variety of materials and examples, it starts from a point where you have no knowledge of the relevant technologies and helps you firmly master the essential skills to the point where you can list the relevant technologies on your résumé..

This course has been tried and tested by many learners, who have provided valuable feedback.
If any issues arise, it may continue to be updated regularly, just as it is now.

Want to build a solid foundation in front-end development?
프론트엔드 기본 기술을 탄탄히 정리해야 합니다. 프론트엔드 기본은 HTML, CSS, Javascript 입니다. React 를 익히더라도, 프론트엔드 기본이 필요합니다. 탄탄한 프론트엔드 기본기가 핵심입니다. 꼼꼼하게 잘 쌓은 기본기 위에, React 든 Flutter 든 익히면 프론트엔드를 원하는대로 만들 수 있습니다. 여기에 최신 웹페이지는 반응형, 호환성등 정리해야할 배경지식과 관련 지식이 있고, 오래전 기술인 Jquery 를 깔끔한 Javascript 로 대체해야 합니다.

This course thoroughly covers essential, scattered frontend fundamentals such as HTML, CSS, JavaScript, responsive design, compatibility, and ES6!

It carefully covers the scattered frontend fundamentals you absolutely need to know!
I have a rough understanding, but I don't feel like I have it organized

You may have a rough idea of how to use HTML, CSS, and JavaScript, but when you actually try using them, it can be difficult to handle them the way you want. There are countless scattered syntax rules and technologies, such as responsive design, compatibility, and ES6. Front-end development in particular is more difficult than it seems unless you organize and learn it properly.

I heard that once you become full-stack, you can build web services on your own..., bạn có thể tự mình xây dựng dịch vụ web...

Whether it’s the web or an app, recent services require backend, frontend, and deployment technologies to implement. This is called full-stack development. By becoming a full-stack developer, you can build modern web services on your own and become a competitive developer.

To pursue this most effectively and practically, you should learn Python and backend technologies in Full-Stack Course Part 1, then build a foundation in frontend development in Part 2. Only with a solid foundation! can you truly become a full-stack developer instead of simply copying the web services shown in the course. This course thoroughly covers HTML5, CSS, and JavaScript (vanilla JavaScript, VanillaJS) + ES6 so that you can build a strong foundation in frontend development.

I created a summary of the fastest and most up-to-date full-stack roadmap in a YouTube video. By referring to this video, you can understand not only this technology but also a roadmap for developing websites and apps on your own in a short amount of time.

 

Made for a solid and practical foundation in frontend development..

With countless syntaxes and features, the starting point for front-end development should begin with the keyword “organization.”
I have organized the many different syntaxes and areas of knowledge under the following conditions.

  • We cover all the background knowledge you need to develop modern websites
  • We thoroughly cover the essential CSS you need to create polished web pages
  • We do not cover jQuery, which is no longer used in modern web pages
  • We cover everything using standard vanilla JavaScript + ES6 instead
  • support responsive design
  • Compatibility is also taken into consideration

We briefly cover HTML tags, focusing only on the essential ones, including semantic tags.
We also cover CSS features in detail, including the responsiveness and compatibility needed to build convincing web pages.
As the name VanillaJS (vanilla JavaScript) suggests, current trends no longer use jQuery, so we build web pages using only JavaScript + ES6 syntax while taking compatibility into consideration.
For each feature, we exclude extremely new syntax that cannot be used due to compatibility issues, as well as replaceable technologies, and focus on the core technologies.

Don't waste time!
We don't fail to do it because we lack information!
By learning through a proven course, you can quickly get up to speed!

Isn't it enough to learn only JavaScript?

The biggest bottleneck in full-stack development is CSS. People say that even middle school students know HTML and CSS.
However, unless you are a fairly skilled front-end developer, you cannot create responsive, compatible, and polished modern web pages.
You need to organize countless detailed CSS features. HTML also needs to be reviewed and organized according to web standards at least once.
There is also a job called a publisher in Korea, but overseas, front-end and full-stack developers handle everything, including CSS.
To become a competitive front-end/full-stack developer, it is essential to thoroughly organize your knowledge of CSS features.

 
Don't you need to learn React and Vue to build web services?

These frameworks are written in JavaScript to address some of JavaScript’s shortcomings. Since you use JavaScript even when working with these frameworks, you should thoroughly learn the basic syntax of JavaScript, regardless of which framework you choose. Once you have a solid foundation in the HTML, CSS, and JavaScript covered in this course, you can go on to learn frameworks such as React and Vue.
That’s why this course focuses on the fundamentals of front-end development. To help you build a solid foundation, we cover and practice all the essential related technologies. 

 

Can even beginners do it?

This course provides detailed, step-by-step explanations so that beginners can follow along.
The most difficult type of IT course is one that teaches programming to people who know absolutely nothing about it. Even such learners have mastered not only programming but also web scraping through the Python Basics and Crawling Fundamentals Bootcamp course I created. If you are reasonable and considerate of others, it is entirely possible.

If you simply want to quickly get up to speed on frontend technologies, you can take this course on its own. However, if you are a complete beginner who has never worked with programming before, I recommend learning step by step through the roadmap by taking the Python Basics and Crawling Bootcamp course together with the full-stack course. This will allow you to steadily build the skills you need.

So even beginners can understand
Based on concise yet thorough materials,
you can test things yourself during the lectures
and immediately run tests with feature-specific sample code and

• We provide sample code for each feature, written as projects, along with code files for real-world web pages.
• The course materials are provided online so you can access them at any time. (However, copying and downloading are restricted due to copyright concerns.)

 

Can I learn in a systematic way? không?

We are creating this course so that you can start as a beginner and gradually increase the difficulty as you learn the entire process of becoming a full-stack developer in a detailed and systematic way. To help you understand the relevant syntax and concepts, we provide concise code and sufficient explanations, while also covering computer science fundamentals whenever necessary, so that you can build the foundation needed to become a good developer.

This course is Part 2 of the full-stack course series. In this course, we select a specific webpage for developing the following service and work together to complete the code step by step, starting from a blank file and using HTML, CSS, and JavaScript + ES6 without any frameworks or libraries.

You’ll be able to feel, 'Ah! This is really different!'
This course is thoughtfully designed
All you have to do is follow along!


Learn systematically
Dave Lee’s roadmap for fun coding

Following this course, a roadmap for AI, development, data, and CS that you can learn according to your goals giúp bạn học theo đúng mục tiêu.

IT technologies are interconnected.
By selectively learning connected technologies and adding AI, you can reach your goals much faster.

Every roadmap covers how to connect and use technologies together,
is designed to increase in difficulty from beginner to expert level, and
has been consistently updated for years.

You’ll also receive a greater discount than if you took the courses individually.

3. The basics of development and data, and core computer science (CS) knowledge

From computer architecture, operating systems, networks, system software, software engineering, and architecture to data structures and algorithms

← Swipe left and right to explore the CS courses and the full roadmap →

View the full computer science roadmap in detail

4. The Most Reliable Ultimate AI Utilization Roadmap (2026)

From Claude Code-based task automation and vibe coding to Codex, OpenClaw, Claude Code-based data analysis, advanced Claude Code techniques such as agentic, harness, and loop engineering, and AI agent development.

← Swipe left or right to explore AI courses and reference materials →

View the Most Reliable Ultimate AI Utilization Roadmap (2026) in Detail

Recommended for
these people

Who is this course right for?

  • Part 2 Course for Full-Stack Development

  • Those who want to build a strong foundation in frontend development

  • Those who want to develop a web service that can be commercialized immediately.

  • For those who need an overview of various front-end technologies, including responsiveness and compatibility.

  • Introduction to Frontend Development

Need to know before starting?

  • If possible, I highly recommend taking this course alongside the Full-Stack Part 1 course.

Hello
This is funcoding

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4.9

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Courses

Janjemi Coding, Dave Lee

  • About Janjaemi Coding Introduction Blog [Click]

  • Key Experience: Coupang Senior Development Manager/Principal Product Manager, Samsung Electronics Development Manager (Approx. 15 years of experience)

  • Education: BA in Japanese Language and Literature, Korea University / MS in Computer Science, Yonsei University (A complete mix)

  • Key Development Experience: Samsung Pay, E-commerce Search Service, RTOS Compiler, Linux Kernel Patch for NAS

  • Books: Linux Kernel Programming, Understanding and Developing the Linux Operating System, IT Core Technologies That Anyone Can Easily Read and Understand, Python Programming Primer for Absolute Beginners

  • Operating Site: Fun-Coding (http://www.fun-coding.org) [Click]

  • This is a site that shares free materials related to full-stack development, data science, and AI.

  • Others: Fun-Coding YouTube Channel [Click]

    • I am starting little by little to share tips and short free lectures that are helpful for IT learning~

While working in the industry, I have been consistently creating solid full-stack, data science, and AI courses for 8 years.

 

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Curriculum

All

79 lectures ∙ (17hr 36min)

Course Materials:

Lecture resources
Published: 
Last updated: 

Reviews

All

184 reviews

4.9

184 reviews

  • dudley님의 프로필 이미지
    dudley

    Reviews 2

    Average Rating 5.0

    5

    100% enrolled

    I was trying to do a project after listening to another instructor's front-end lecture, but I was at a loss, so I watched Instructor Janjaemi's lecture on my friend's recommendation. He taught slowly from the basics, so I understood everything without missing anything. As a result, I was able to finish the project that I had been at a loss about, and thanks to that, I gained confidence. If you're still having trouble, I highly recommend listening to it!! Thank you so much, instructor~!

    • funcoding
      Instructor

      Wow, I'm so happy. Confidence is really important. Well, it may not be perfect, but I think I can do it now, and if I keep doing this, I think I can do it well! If you felt this, you've really taken a big step. Congratulations, and I'm so happy that it helped you. Haha

  • madsong님의 프로필 이미지
    madsong

    Reviews 7

    Average Rating 5.0

    5

    63% enrolled

    I listened well! I'm currently preparing for a job as a front-end developer, and this was very helpful. Now I have to study hard to make it mine..ㅎ I'm looking forward to the next lecture!!

    • funcoding
      Instructor

      That's right. I think it would be helpful to practice making it your own, and also to listen to lectures from other instructors, such as Clone Coding, regarding the front-end. !!!!

  • ith13579님의 프로필 이미지
    ith13579

    Reviews 19

    Average Rating 5.0

    5

    99% enrolled

    I only looked at the first part of CSS and HTML, but it is more detailed and detailed than what is actually applied in practice, and it explains in various ways. In addition, the quality of the lecture materials that the instructor uses in class is really good. These days, since spa libraries or frameworks are used in practice, it is important to know how to manipulate UI using pure JavaScript rather than jQuery, and this lecture is strong in this respect as well. I won't say more. I think this lecture is a great deal for this price. Take this lecture instead of other clone coding lectures.

    • funcoding
      Instructor

      Thank you for leaving such a great review. When I was learning this part in the past, I was tired because I wondered why there were so many detailed functions, but I had to learn them, so I organized them one by one. This is the part where I made the lectures in the way I learned them in order to become a full-stack. If you can't remember the detailed functions, go to the Google Drive folder I provided and search at the top. Then, since you have taken the lecture, you will be able to see the materials with related keywords right away. Then, you can implement them much faster. I will film this part on YouTube later and share it separately. Thank you.

  • mozzzi2님의 프로필 이미지
    mozzzi2

    Reviews 1

    Average Rating 5.0

    5

    100% enrolled

    I love you teacher

    • funcoding
      Instructor

      Hahaha thank you. Haha you have a sense of humor haha

  • michaelaeon5592님의 프로필 이미지
    michaelaeon5592

    Reviews 13

    Average Rating 4.9

    5

    99% enrolled

    Hello. I am interested in web-related development, so I took lectures here and there and settled on Janjaemi Coding's lecture. Since web-related technologies have many related fields and there are many things to learn, there were too many things to do to do properly, so I had a hard time taking lectures here and there because I was impatient. The part that I especially liked while taking the lecture was that it helped me to find the center of full-stack, such as how I can use what I learned and what I need to learn when I move on to the next step. If Part 1 focused a little more on server-side technologies, Part 2 was good because I could learn various technologies on the UI side. Some people might be disappointed because it is not fancy, but I think that fancy technologies can be learned quickly if you have a good grasp of the basics. It was also good that it explained HTML/CSS in depth enough, so I didn't have to use various tricks or frameworks to cover up parts that I couldn't implement with CSS with JavaScript. Since web technologies are diverse, I think there are often cases where I cover up weak parts with other technologies or frameworks, but I liked that there were explanations and practical exercises that focused on the basics. JavaScript also explained the necessary parts concisely, which helped me understand. Of course, I personally need to study more, but it was helpful because it was connected to the practice. The practice implemented in the lecture was small, so I may not have much experience like a current worker, but it was good because I could get ideas and implementation methods for basic functions. I also look forward to Vue, which is scheduled to open in the first half of the year. If you make a lecture that compares how parts implemented in vanilla JS can be implemented more easily using Vue, it will be very helpful for beginners like me to learn. I hope you will reflect it. ^^ For reference, from my personal experience, I recommend taking the Python basics course, then Part 1 and Part 2 in that order. After that, if you want to add functions such as crawling or data analysis to the web server, it would be good to take the relevant courses.

    • funcoding
      Instructor

      Thank you for your good review. This course is about creating a modern web page that looks good from the ground up, so it is different from courses that follow a fancy UI with one or two lines of code that have already been created. Those techniques can be used later when needed, but they are not used in the field. Especially when creating a large-scale web page. In order to create it perfectly, you have to build up the basics by creating it step by step, and I hope that this part was helpful. There are so many IT-related information, lectures, and advertisements, so there are many lectures that say, “Just type in the code and you’ll get this fancy thing?” I’ve taken those lectures before, and they didn’t leave anything to me. So I remember learning everything separately for a long time. I hope this learning method is much better and a shortcut to becoming a capable developer.

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