diffrence between == and === ?

splice and slice ?

higher order functions ?

var - let - const ?

hoisting ?

cookie, local-storgae, session-storage ?

closure ?

module ?

async js ?

promise ?

callback ?

async await ?

null and undefined ?

data types ?

primitive types and references types ?

signle thread js ?

stack memory - heap memory ?

setTimeout - setInterval ?

JSON ?

regex ?

spread operator ?

SET and MAP ?

prototype ?

constructor functions ?

oop ?

template literals ?

object destructuring ?

filter - find ?

arrow function ?

forEach - map ?

concat - spread operator ?

truthy - falsy ?

for of - for in ?

library in js ?

deep copy - shallow copy ?

BOM - DOM ?

event ?

fetch ?

error handling ?

xss attack ?