Important Javascript Concepts with Codes

Basic Concepts

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

Data Structures

• Arrays
• Objects
• [ES6] Maps
• [ES6] Sets
• WeakMaps & WeakSets
• [ES6] Typed Arrays
• 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
• Currying
• Pollyfills
• [ES6] Iterables & Iterators
• [ES6] Generators
• Decorators
• String methods
• Debouncing
• Throttling
• Number & Dates in JS

How Javascript Works

• Compilation, Interpretation and JIT-Compilation
• Javascript Runtime
• Javascript Engine
• Execution Contexts
• The this keyword
• Arrow Functions Vs Regular Functions
• Hoisting and TDZ
• Primitives and References
• Node.js Event Loop

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
  • using Constructor Functions
  • using ES6 Classes
  • using Object.create
• Chaining Class Methods

Asychronous Javascript

• Synchronous vs Asynchronous
• Promises, Promisify
• fetch API, chained promises
• [ES2017] async/await
• Promise static methods
  • Promise.all
  • Promise.race
  • Promise.allSettled
  • Promise.any
• Comparision Promise.race vs Promise.any

Modules

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

Node.js

• Basics
• NPM, package.json and package-lock.json
• libuv
• Improve Node.js application performance
• Cluster
• PM2
• Worker Threads
• Child Processes
• fs module
• http module
• Event Emitters, CaptureRejection, AbortController
• Express.js
• Buffer
• Streams, pipe() and pipeline()
• CLI
• Deployment WIP

Misc Read

• Tricky JavaScript Interview Problems
• HTTP Basics
• XSS Attacks and Prevention
• CSRF Attacks and Prevention
• Securing REST APIs
• Scaling REST APIs - WIP
• REST APIs Problems & Fixes WIP

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