A place or website to practice Js?

Answer 1

You can practice Js right here in SoloLearn.

Go to the main page (when you open the app)

On the bottom of your screen you should see a navigation section of buttons.

Tap {} Code
Then Tap + New Code
Then select your language (Web)
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If you're seeking expanded functionality, I like to use jsfiddle.net.
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If you seek more, it'd be best to do your work in an IDE for web development on your machine.

Answer 2

Please take a look at the forum rules:
https://www.sololearn.com/Content-Creation-Guidelines/
https://www.sololearn.com/Discuss/1316935/?ref=app