Modern JavaScript (ES6+) Basics

I am a junior developer currently working as a front-end developer. I thought I knew it well, but after watching this lecture, I found myself knowing it here and there. Now, I will write my course review. I am writing this review after listening to all four lectures, from the JavaScript beginner course to the ES6 advanced course. I think the best course review is when you can write about things that you couldn't write because you had vague knowledge. For example, by knowing the argument value that will receive the parameter value as this after the map, forEach, and filter functions, I was able to finish the time complexity of (n2) by repeating the loop twice, and as the concept of call, apply, and bind became clearer, I was always confused about this, but when I was confused, I could directly bind this when calling the function and handle it. And as for the concept of scope, while listening to the in-depth course, I found it step by step, and if it is not there, I look for __proto__, and if it is not there, I look for __proto__ in the lower part, etc. I don't know if this expression is right, but I was really blessed while listening to Youngbo's lecture... And last night, while implementing csr directly in vanilla, I felt the fun of learning about things that I would not have even known the principles of in the front-end framework, such as inheriting built-in objects for class events and processing them. Certainly, even people in the team said that my code has suddenly become surprisingly clean. They told me stories. For those of you who are thinking about taking the course, this is a course that you will not regret spending money on. Especially for those of you who want to know and use it for sure, whether you use the functions you used every day or not, you will feel that there are many more convenient, better, and more efficient built-in functions. Don't hesitate, I recommend that you purchase all of Youngbo's lecture series and listen to them all. You will feel that the quality of your code will change and your way of thinking will change. I guarantee it.

He explains in depth without missing even the smallest details. He helps you understand and think through appropriate examples for each part. I haven't finished this lecture yet, but looking at the previous lectures, I think it's a lecture that can help you organize javascript and build a tower you've worked hard for.

At first, I got off once because it was deeper than I thought and felt like a college theory lecture. There were many terms and concepts that I didn't know, so I was frustrated. (They wrote that it wasn't a beginner course in the learning target, but I thought I wasn't a beginner, but I was.) However, I didn't think it was right to give up the lecture because I didn't know many things and was frustrated, so I searched for concepts that I didn't know and listened to them. So, even though there was no chapter that took more than an hour, I listened to it while understanding it every time, following the example codes, and checking them in the console. I think it took more than an hour. In the end, I finished the course this week. Honestly, I can't say that I understood everything yet, and there are still parts that I don't understand, but I feel rewarded for consistently completing one lecture. I was able to understand basic concepts of JS, such as the var let const keyword, China arrow function, and after skimming through it once, I was able to understand many things, which was good. I will continue to listen to the advanced lecture and DOM lecture. Thank you.

In 2020, the thing that helped me the most in the development field and helped me grow the most was coming across your lectures. When I first started the series of lectures, I started with the level of understanding that I could just roughly get the source code from the internet and modify it a little to use it on the screen quickly. Even before this lecture, I tried numerous frameworks and libraries such as React.js and Node.js, and I literally just followed them one by one without any fundamental understanding of why they were done this way. However, I thought that doing this was meaningless, and I desperately wanted to build up the basics of JS first, so I considered various lectures and books. I also happened to choose the lectures by chance. It was a bit boring and difficult at first. However, I gradually started to adapt to the lectures, and as I started taking the lectures repeatedly, the concepts were organized one by one. By following the lectures and developing the habit of debugging, I was able to understand the code on my own, even when I started without knowing anything about scope, prototype, __proto__, hoisting, closure, this, etc. I have finished 3 out of 4 lectures in the series and am currently taking the last lecture. When I don't remember what I studied before, I look back at the lectures and organize the content to use what I have learned now, so I am working on a study and personal project. Thank you!

At first, I was skeptical because the lecture was short, but the content is really informative. Repeated learning is the only answer. It's okay if you don't understand it at once. Repetitive learning!! It's important!

I am a developer who has neglected studying JavaScript and has focused only on the server side. I don't leave comments often, but Kim Young-bo's lectures are easy on the ears. It's simple and good.

It helped me a lot in getting started with JavaScript. Thank you for explaining it in a structured and logical way. I would appreciate it if you could continue to provide any lectures or books in the future.

I was looking for a lecture that could give me a comprehensive overview of JavaScript content, and this is perfect for review. It helped me clearly recall things I thought I just roughly knew, so after completing it (though I'm still far from sufficient), I feel a strange sense of confidence😊😊