Important Javascript Concepts with Codes

Basic Concepts

• var, let [ES6] and const [ES6], and their comparision
• typeof
• Type Conversion and Coercion
• Function Declaration and Expression
• Equality Operators
• Falsy Values
• [ES6] Destructuring Assignment
• Short Circuiting
• Nullish Coalescing Operator
• [ES6] Spread Operator
• [ES6] Rest Operator
• [ES6] Arrow Functions
• [ES6] Enhanced Object Literals
• [ES6] Template Literals
• [ES6] for-of loop
• for-in loop
• Error Types
• Console methods
• User Interaction (Browser)
• DOM Manipulation (Browser)

Data Structures

• Arrays
• Array Methods
• [ES6] Typed Arrays
• Objects, properties retrieval, removal, iteration, clone and methods
• Objects' this keyword
• [ES6] Maps, iteration and methods
• [ES6] Sets, methods and use cases
• Symbols (WIP)
• Which data structure to use?

Functions

• [ES6] Default parameters
• Pass by Value OR Pass by Reference
• setTimeout()
• setInterval()
• Optional Chaining
• Closures
• Higher Order Functions
• call, apply and bind methods
• IIFE
• String methods
• Debouncing
• [ES6] Iterables & Iterators
• [ES6] Generators
• Decorators (WIP)
• Number & Dates in JS

How Javascript Works

• Compilation, Interpretation and JIT-Compilation
• Javascript Runtime
• Javascript Engine
• Function Execution Context
• Hoisting and TDZ
• The this Keyword
• Arrow Functions Vs Regular Functions
• Primitives and References
• Event Loop
• Event Loop Queues
• Memory Management (WIP)

Modules

• Introduction & Module Types
• ES6 Modules
• Module Pattern & Modules behind the scenes
• import vs require

Object Oriented Javascript

• Object Oriented Programming in Javascript
• Constructor Functions and Prototypes
• Prototype Chain
• Prototypal Inheritance
• ES6 Classes
• ES6 Classes - getters and setters
• Object.create
• Static Methods
• Inheritance
• Encapsulation
• Chaining Class Methods

Asychronous Javascript

• Synchronous vs Asynchronous
• Promises
• fetch API
• Event loop, Behind the scenes
• Promisify
• [ES2017] async/await
• Promise static methods - Promise.race, Promise.all, Promise.any and Promise.allSettled
• Comparision Promise.race vs Promise.any

Node.js

• Basics
• NPM and Package.json
• Local and Global package installation
• Cluster
• Worker Threads
• CLI
• fs module
• http module
• Event Emitters, CaptureRejection, AbortController
• Buffer
• Streams, pipe/pipeline
• Express.js framework
• Useful inbuilt node modules