JavaScript

The content on JavaScript is divided into two parts:

1. Basics
2. Advanced

Each of these parts will have following concepts in it:

Basics

• Hoisting
• Let vs Const vs Var
• Scope
• Strict Mode
• Data Types
• Regular Function vs Arrow Function
• Arguments in a function
• Event Listeners
• Event Propagation
• Event Delegation
• DOM Manipulation
• EVAL
• Template literal -IIFE
• Error Handling - Try…catch
• Memoization

Advanced

• Mutability vs Immutability
• Callback and Callback hell
• Promises
• Async Await
• Prototype / proto
• Inheritence
• Constructor Function
• Classes
• this and identifying it’s value
• Overwriting this -> call/bind/apply
• Pure functions
• Proxy
• Symbol
• Memory leaks
• Garbage collection
• Curring
• Cascading
• Object freeze vs seal
• Object.defineProperty
• Generator functions

Polyfill

• Promise
• PromiseAll.
• Call, Bind, Apply
• ForEach, Map, Reduce

You will also find few JavaScript code that you can refer to get some context.