Format:

Bring some practical coding challenges that can be accomplished with JS
Vote for tasks & split into pairs or triples
Work to perform the tasks
Demo result
Every member summarizes what he has learned

Resources

Online course https://www.hackerrank.com/domains/tutorials/10-days-of-javascript

Books

http://eloquentjavascript.net http://exploringjs.com

Online challenges

Basic level

https://learn.freecodecamp.org/javascript-algorithms-and-data-structures/basic-javascript

Advanced level

https://learn.freecodecamp.org/javascript-algorithms-and-data-structures/intermediate-algorithm-scripting https://www.codewars.com/?language=javascript

JS reference

https://developer.mozilla.org/en-US/docs/Web/JavaScript

Environment

https://nodejs.org/en/ https://code.visualstudio.com/