Modern JavaScript
ES6+ features and modern patterns: modules, destructuring, arrow functions, classes and tooling.
What this section covers
This category covers the modern features and syntax introduced since ES6 that make JavaScript more expressive and maintainable. Expect approachable explanations of language additions and when to use them.
Why this matters to a developer
Modern features reduce boilerplate, enable modular design, and improve readability. Knowing the trade-offs helps you choose the right syntax and avoid anti-patterns.
How to use this section
Start with Arrow Functions and Destructuring to see how syntactic sugar simplifies code. Then read ES6 Modules and Modern Tooling to understand project structure.
🔗 Related:
FAQ
Q: Should I always prefer modern syntax?
A: Prefer readability and team conventions. Modern syntax is generally better, but understanding what's happening underneath is important for clarity and debugging.
Topics in this section
Arrow Functions
Explain arrow function syntax and how lexical `this` differs from regular functions.
Destructuring
How array and object destructuring works and common patterns for clean code.
Spread and Rest
Explain the spread (`...`) and rest syntax for copying and collecting values.
Classes
Understanding ES6 classes as syntactic sugar over prototypes and when to use them.
Iterators and Generators
Explain iteration protocols and how generators simplify writing lazy sequences.
ES6 Modules
Practical module patterns, live bindings, and dynamic imports.
Optional Chaining
Explain `?.` operator for safe property access and how it reduces guard code.
Modern Tooling
An overview of bundlers, transpilers, linters, and dev servers in modern JS projects.