back js...
01 - foor loop
02 - while
03 - break, continue
04 - label
05 - for in
06 - for of
07 - with statment
08 - function
09 - return
10 - optional parameter
11 - default parameter
12 - rest parameter
13 - value function
14 - anonymous function
15 - nested function
16 - scope
17 - recursive function
18 - function generator
19 - arrow function
20 - closure
21 - object method
22 - this
23 - arrow function pada object
24 - getter dan setter
25 - variable
26 - destructuring
27 - strict mode
28 - debugger