Concepts Covered:
Hoisting
Async Vs Defer
Asynchronous Programming and Callbacks
DOM vs BOM events
Closures
Arrow, first-class & higher-order functions
Foreach vs for-of vs for-in vs for await
Method Chaining
Recursion
Promises, async/await
Prototypes, inheritance
Classes & OOPS
Currying
Fetch API
Proxy and Reflect
Spread operator
Array & object destructuring