JavaScript Essentials

Chapter 1: Fundamentals

• ▸Variables: let and const
• ▸Types and template literals
• ▸Operators and comparisons
• ▸Functions and arrow functions
• ▸Arrays

Chapter 2: Functions

• ▸Declaring a function
• ▸Arrow functions
• ▸Default parameters
• ▸Rest and spread

Chapter 3: Arrays and methods

• ▸Creating and accessing
• ▸map and filter
• ▸reduce
• ▸find, includes and more

Chapter 4: Objects

• ▸Objects and properties
• ▸Methods in objects
• ▸Destructuring
• ▸Object spread

Chapter 5: Strings

• ▸String methods
• ▸slice and indexOf
• ▸split and join
• ▸trim, replace and repeat

Chapter 6: Scope, hoisting and closures

• ▸var, let and const
• ▸Scope and hoisting
• ▸Closures
• ▸this and context

Chapter 7: Classes and OOP

• ▸Classes and constructor
• ▸Methods, getters and setters
• ▸Inheritance
• ▸Prototypes

Chapter 8: Asynchrony: Promises and async/await

• ▸Synchronous vs asynchronous
• ▸Promises
• ▸async / await
• ▸Errors and parallel operations

Chapter 9: Modern JavaScript (ES6+)

• ▸Destructuring
• ▸Spread and rest
• ▸Optional chaining and nullish
• ▸Modules (import / export)

Chapter 10: Error handling

• ▸try, catch and finally
• ▸throw and Error types
• ▸Custom errors
• ▸Asynchronous errors

Chapter 11: Map and Set

• ▸Map
• ▸Set
• ▸Map/Set vs Object/Array
• ▸Iterate and convert

Chapter 12: Iterators and generators

• ▸for...of and for...in
• ▸Iterables and the iterator protocol
• ▸Generators
• ▸Generators in practice

Chapter 13: Functional programming

• ▸Pure functions and side effects
• ▸Higher-order functions
• ▸Immutability
• ▸Function composition

Chapter 14: Regular expressions (Regex)

• ▸What a regex is
• ▸Character classes
• ▸Quantifiers
• ▸Anchors and boundaries
• ▸Groups and capturing
• ▸Flags and methods

Chapter 15: Advanced asynchrony

• ▸Promise.all vs allSettled
• ▸Promise.race and Promise.any
• ▸Sequential vs parallel
• ▸Async iterators and for await
• ▸Async generators
• ▸Advanced error handling

Chapter 16: Algorithms and data structures

• ▸Complexity (Big-O)
• ▸Recursion
• ▸Sorting
• ▸Search: linear and binary
• ▸Map and Set for algorithms

Chapter 17: Design patterns in JavaScript

• ▸The Module pattern
• ▸Factory pattern
• ▸Singleton
• ▸Observer (pub/sub)
• ▸Strategy

Chapter 18: Advanced functional programming

• ▸Currying
• ▸Partial application
• ▸Function composition
• ▸Memoization
• ▸Immutability and Object.freeze

Chapter 19: Metaprogramming

• ▸this in depth
• ▸call, apply and bind
• ▸Prototypes and the prototype chain
• ▸Symbol
• ▸Proxy
• ▸getters, setters and defineProperty

Chapter 20: Performance and best practices

• ▸Debounce
• ▸Throttle
• ▸Avoiding recomputation
• ▸Data structures and complexity
• ▸Common pitfalls

Chapter 21: Final project: Contact book