whats the diff between
let and var

4 rules for variable names`

variable types

primitive types

undefined type

dynamic typing

what is special about undefined

reference types

example of object literal

make a person object

accessing an objects props
2 types
and examepls

why use bracket notiation

example of an array literal

what does === mean

what does == mean, and how does it do it?

example of ternary

logical operator and non bool

Falsy values

example of switch

for in loop

diff between : and =

what is hoisting

what is 'this'

4 pillars of OOP

encapsulation

simple diff between oop and procedural

abstraction

inheritance

polymorphism

what is closure

How do you do oop with classic JS? when there are no classes

how does JS engine search for a method or prop