basicjs

Samples are for below topics

1. Scope
2. Closures
3. With/Let
4. Hoisting basics
5. Promises
6. Scope/Closure samples

References

Promises

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

http://www.html5rocks.com/en/tutorials/es6/promises/

Scope/Closoure

http://www.w3schools.com/js/js_function_closures.asp

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

Hoisting

http://www.w3schools.com/js/js_hoisting.asp

Some Additional stuff on Java script compilation :

https://developers.google.com/v8/design#mach_code

http://thenextweb.com/google/2014/02/13/google-speeds-chrome-compiling-javascript-background/

https://developers.google.com/closure/compiler/?hl=en

https://en.wikipedia.org/wiki/V8_(JavaScript_engine)