JavaScript what should I learn (Next)?

Question

I'm trying to learn JavaScript, but I don't know where to begin. So far I know how to get _ document.getElementById("elem") - and customize elements with CSS (Onclick), and hiding and showing elements.

Now I need some ideas - what should I learn next in JavaScript.?
These are some of my JavaScript codes that I completed successfully(hide/show & doc.getElemById("el"):
https://code.sololearn.com/WJ2LcUAQ3TvZ/?ref=app

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

https://code.sololearn.com/WIMW1B0B2R6T/?ref=app

Answer 1

Have you checked out the w3schools site?

Answer 2

Ya. i started on it. from beginning -->>. should i just do it like that start @ the beginning and learn whatever lesson is next?