Introduction to ES6 in Javascript
What is ES6?
ES6 (ECMAScript 2015) introduced major improvements like let/const, arrow functions, classes and modules.
Why ES6? Cleaner syntax, better performance and modular structure.
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Introduction to ES6
Javascript
8 min min read
Updated: Feb 15, 2026
Intermediate
Progress
1 / 15
📑 Table of Contents
Basics
- 1 Introduction to JavaScript
- 2 JavaScript Setup & Console
- 3 Variables in JavaScript
- 4 Data Types in JavaScript
- 5 Operators in JavaScript
- 6 Type Conversion
- 7 Conditional Statements
- 8 Loops in JavaScript
- 9 Arrays in JavaScript
- 10 Objects in JavaScript
- 11 JSON in JavaScript
- 12 String Methods
- 13 Number Methods
- 14 Math Object
- 15 Date Object
Functions & Scope
DOM & Browser
- 26 Introduction to DOM
- 27 Selecting Elements
- 28 Modifying Content
- 29 Changing Attributes
- 30 Manipulating Styles
- 31 Creating and Removing Elements
- 32 Event Handling Basics
- 33 Event Propagation
- 34 Event Delegation
- 35 Form Handling
- 36 Local Storage & Session Storage
- 37 Cookies in JavaScript
- 38 Window Object
- 39 Location & History API
- 40 Timers & Animation
ES6+ Modern JS
- 41 Introduction to ES6
- 42 Let and Const
- 43 Arrow Functions
- 44 Template Literals
- 45 Default Parameters
- 46 Destructuring Arrays
- 47 Destructuring Objects
- 48 Spread Operator
- 49 Rest Parameters
- 50 Enhanced Object Literals
- 51 Classes in ES6
- 52 Modules in JavaScript
- 53 Promises
- 54 Async and Await
- 55 Optional Chaining and Nullish Coalescing
Async JavaScript
- 56 Introduction to Asynchronous JavaScript
- 57 JavaScript Event Loop
- 58 Call Stack and Callback Queue
- 59 setTimeout and setInterval
- 60 Callback Functions
- 61 Callback Hell
- 62 Introduction to Promises
- 63 Promise Chaining
- 64 Promise.all and Promise.race
- 65 Error Handling in Promises
- 66 Async Await Deep Dive
- 67 Error Handling with Async Await
- 68 Microtasks vs Macrotasks
- 69 Fetch API
- 70 AbortController and Request Cancellation
Advanced Concepts
- 71 Execution Context in JavaScript
- 72 Lexical Environment
- 73 Closures Deep Dive
- 74 Hoisting Explained
- 75 Temporal Dead Zone
- 76 Prototype and Prototypal Inheritance
- 77 Object.create and Object.assign
- 78 Property Descriptors
- 79 Reflect API
- 80 Proxy in JavaScript
- 81 Symbols in JavaScript
- 82 WeakMap and WeakSet
- 83 Garbage Collection in JavaScript
- 84 Debouncing and Throttling
- 85 Currying and Function Composition
OOP & Patterns
- 86 Object-Oriented Programming in JavaScript
- 87 Classes in JavaScript
- 88 Constructor Functions
- 89 Encapsulation in JavaScript
- 90 Inheritance with Classes
- 91 Polymorphism in JavaScript
- 92 Abstraction in JavaScript
- 93 Factory Pattern
- 94 Singleton Pattern
- 95 Module Pattern
- 96 Observer Pattern
- 97 Strategy Pattern
- 98 Decorator Pattern
- 99 Dependency Injection
- 100 Design Patterns Best Practices
Performance & Optimization
- 101 JavaScript Performance Fundamentals
- 102 Understanding the Rendering Pipeline
- 103 Avoiding Reflows & Repaints
- 104 Memory Management in JavaScript
- 105 Detecting Memory Leaks
- 106 Debouncing & Throttling
- 107 Optimizing Loops & Iterations
- 108 Efficient DOM Manipulation
- 109 Using Web Workers
- 110 Lazy Loading Techniques
- 111 Code Splitting Strategies
- 112 Tree Shaking Explained
- 113 Minification & Compression
- 114 Performance Profiling with DevTools
- 115 Best Practices for Production Performance
Tooling & Ecosystem
- 116 Introduction to JavaScript Tooling
- 117 NPM and Package Management
- 118 Yarn and PNPM
- 119 Understanding package.json
- 120 Using Webpack
- 121 Using Vite
- 122 Babel Transpiler
- 123 ESLint & Prettier
- 124 Testing with Jest
- 125 Testing with Cypress
- 126 Using TypeScript with JavaScript
- 127 Git for JavaScript Developers
- 128 Using GitHub Actions
- 129 Deploying JavaScript Apps
- 130 JavaScript Ecosystem Overview
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