How do i improve my JavaScript coding skills

Question

https://code.sololearn.com/W3Z4zPsGTBiY/?ref=app

Answer 1

https://www.sololearn.com/Discuss/2569091/?ref=app

Answer 2

BIMMAN
Please don't advertise a code, since you don't get any profit or you can post code if you have doubt or something that you want to ask about the code

Answer 3

https://code.sololearn.com/W0jt01Ob69QG/?ref=app
https://code.sololearn.com/W83awRDRmp6h/?ref=app

https://www.youtube.com/playlist?list=PLkqwj9vc20pUxlOP1DMZ-zX4_9kCM3DaF