At the moment when I was worried about what to do because my company urgently needed to upgrade vue2 to vue3, this lecture opened,,!! It was really a ray of light for me!!! Thank you. First of all, while listening to the lecture, the core concepts and functions of Vue 3 were explained well, so I was able to understand them quickly!! And I was able to apply them to the actual company project right awayㅠㅠ Thank you again. In fact, these days, there are many lectures that focus on practice rather than concepts, so it is often difficult to understand why the code should be written like that,, Pangyo-nim explains the concepts first and then proceeds with the practice, and this method suited me so well that I could understand it easily!! I would be very grateful if you could upload the composition API lecture soon!