How are you Friends !
I made a quiz application with React JS.
I tried my best to explain one by one for your better understanding.
I hope it can be helpful for you !

Git repository for completed source:
https://github.com/jaewonhimnae/react...

0:00 Introduction

2:43 CreateReactApp

9:41 Create UI

17:33 Create Words Datas

21:53 Explain State

31:01 setInterval, setTimeout

39:44 Control Timer

48:58 handle onSubmit Event

56:11 Check Matched Function

01:08:16 Make Code More Dynamic

01:19:40 Handle Audio File