JavaScript and Best Practices - OryNet IT Services & Consulting

UNIT 1: JavaScript in the Real World
Objective: Understand how JavaScript is used professionally

Role of JavaScript in modern web applications
Role of JavaScript in modern web applications
JavaScript engines (V8, SpiderMonkey)
Interpreted vs JIT-compiled behavior
Code quality vs functionality
Maintainability, scalability, and readability concepts
Professional developer mindset

UNIT 2: JavaScript Language Internals (Deep Understanding)
Objective: Write predictable, bug-free JavaScript.

UNIT 3: Clean Code Principles in JavaScript
Objective: Improve code readability and structure.

UNIT 4: Modern JavaScript Standards (ES6+)
Objective: Use modern syntax correctly and consistently.

UNIT 5: Functions, Objects & Design Patterns
Objective: Apply professional patterns to JS logic.

UNIT 6: Asynchronous JavaScript – Best Practices
Objective: Handle async logic safely and efficiently.

UNIT 7: DOM Manipulation & UI Best Practices
Objective: Build efficient, accessible UIs.

UNIT 8: Performance Optimization Techniques
Objective: Improve speed and responsiveness.

UNIT 9: JavaScript Security Best Practices
Objective: Write secure frontend code.

UNIT 10: Error Handling, Debugging & Logging
Objective: Build reliable and debuggable applications.

UNIT 11: Testing & Code Quality Tools
Objective: Ensure reliability and maintainability.

UNIT 12: Refactoring Legacy JavaScript
Objective: Upgrade real-world existing codebases.

UNIT 13: JavaScript Project Structure & Scalability
Objective: Prepare projects for growth.

UNIT 14: Capstone – Best Practices Implementation Project
Objective: Apply all best practices in one project.

Course Content

UNIT 1: JavaScript in the Real World Objective: Understand how JavaScript is used professionally

Role of JavaScript in modern web applications

Role of JavaScript in modern web applications

JavaScript engines (V8, SpiderMonkey)

Interpreted vs JIT-compiled behavior

Code quality vs functionality

Maintainability, scalability, and readability concepts

Professional developer mindset

UNIT 2: JavaScript Language Internals (Deep Understanding) Objective: Write predictable, bug-free JavaScript.

Execution context & call stack

Lexical environment & scope chain

Hoisting (variables vs functions)

Temporal Dead Zone (TDZ)

this keyword (all binding rules)

Closures and memory implications

Event loop, task queue, microtask queue

UNIT 3: Clean Code Principles in JavaScript Objective: Improve code readability and structure.

Writing self-documenting code

Meaningful naming conventions

Function size & single-responsibility principle

Avoiding deep nesting

Early returns and guard clauses

DRY (Don’t Repeat Yourself)

KISS and YAGNI principles

Refactoring for clarity

UNIT 4: Modern JavaScript Standards (ES6+) Objective: Use modern syntax correctly and consistently.

let vs const vs var

Arrow functions – best use cases

Destructuring (objects & arrays)

Spread & rest operators

Template literals

Default parameters

Optional chaining & nullish coalescing

Modules (import / export)

UNIT 5: Functions, Objects & Design Patterns Objective: Apply professional patterns to JS logic.

Pure vs impure functions

Immutability principles

Factory functions

Module pattern

Revealing module pattern

Observer pattern (intro)

Dependency injection concepts

Composition over inheritance

UNIT 6: Asynchronous JavaScript – Best Practices Objective: Handle async logic safely and efficiently.

Callbacks and pitfalls

Promises – chaining & error handling

async / await patterns

Avoiding callback hell

Error propagation in async code

Parallel vs sequential execution

Retry logic and timeouts

UNIT 7: DOM Manipulation & UI Best Practices Objective: Build efficient, accessible UIs.

Efficient DOM querying

Minimizing reflows & repaints

Event delegation

Avoiding memory leaks in DOM

Accessibility (ARIA basics)

Form validation best practices

Progressive enhancement

UNIT 8: Performance Optimization Techniques Objective: Improve speed and responsiveness.

Performance bottlenecks in JS

Debouncing & throttling

Lazy loading techniques

Efficient loops & data handling

Avoiding unnecessary re-renders

Browser performance profiling

Measuring performance (Lighthouse)

UNIT 9: JavaScript Security Best Practices Objective: Write secure frontend code.

Common vulnerabilities (XSS, CSRF overview)

Secure DOM manipulation

Input validation & sanitization

Handling sensitive data safely

Avoiding eval() and dangerous APIs

Secure API consumption

Content Security Policy (CSP) basics

UNIT 10: Error Handling, Debugging & Logging Objective: Build reliable and debuggable applications.

try/catch usage patterns

Custom error handling strategies

Graceful failure handling

UNIT 1: JavaScript in the Real World
Objective: Understand how JavaScript is used professionally

UNIT 2: JavaScript Language Internals (Deep Understanding)
Objective: Write predictable, bug-free JavaScript.

UNIT 3: Clean Code Principles in JavaScript
Objective: Improve code readability and structure.

UNIT 4: Modern JavaScript Standards (ES6+)
Objective: Use modern syntax correctly and consistently.

UNIT 5: Functions, Objects & Design Patterns
Objective: Apply professional patterns to JS logic.

UNIT 6: Asynchronous JavaScript – Best Practices
Objective: Handle async logic safely and efficiently.

UNIT 7: DOM Manipulation & UI Best Practices
Objective: Build efficient, accessible UIs.

UNIT 8: Performance Optimization Techniques
Objective: Improve speed and responsiveness.

UNIT 9: JavaScript Security Best Practices
Objective: Write secure frontend code.

UNIT 10: Error Handling, Debugging & Logging
Objective: Build reliable and debuggable applications.

UNIT 11: Testing & Code Quality Tools
Objective: Ensure reliability and maintainability.

UNIT 12: Refactoring Legacy JavaScript
Objective: Upgrade real-world existing codebases.

UNIT 13: JavaScript Project Structure & Scalability
Objective: Prepare projects for growth.

UNIT 14: Capstone – Best Practices Implementation Project
Objective: Apply all best practices in one project.