What are the best ways to develop skill in Js after completing Js course

Answer 1

Building Projects ! ; for front-end you may build a weather app using openweather api or just build a simple timer with pause and start options

for backend create a CRUD project like a taskmanager app

Answer 2

practice, practice and again practice... that the only real way to increase your skill at any languages ;P

Answer 3

❄ Websites To Practice Your Coding Skills
⚡ https://www.hackerrank.com
⚡ https://www.codewars.com
⚡ https://www.hackerearth.com
⚡ https://codecombat.com
⚡ https://projecteuler.net
⚡ https://brainwar.it
⚡ http://www.programmr.com
⚡ https://www.codechef.com
⚡ http://www.codeabbay.com
⚡ https://www.topcoder.com
⚡ https://coderbyte.com
⚡ https://leetcode.com
⚡ http://exercism.io
⚡ https://codefights.com
⚡ http://www.cyber-dojo.org
⚡ http://codingbat.com
⚡ http://www.pythonchallenge.com
⚡ https://codegolf.stackexchange.com
⚡ https://www.codingame.com
⚡ http://www.programmr.com
⚡ https://programmingpraxis.com
💧 Credit :: Maz