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JavaScript Programming (Advanced)

Master Asynchronous Patterns, Performance Optimization, and Framework-Independent Advanced JavaScript Techniques. Become a JavaScript Programmer.
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Course Duration: 22 Hours
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JavaScript Programming (Advanced) – Self-Paced Online Course

Unlock the full potential of modern JavaScript with this advanced, self-paced online course specifically designed for developers aiming to deepen their understanding of JavaScript's inner workings. This course is a comprehensive resource for anyone looking to move beyond intermediate knowledge and gain a command of high-level JavaScript programming. It is ideal for frontend and full-stack developers who want to write better, faster, and more secure code, without relying on frameworks.

As JavaScript has grown from a simple scripting language to the backbone of modern web development, the need for deeper understanding has never been more critical. This course addresses that need by focusing on the mechanics that power advanced JavaScript—moving past just using frameworks or libraries and diving into what makes JavaScript tick. Students will explore advanced asynchronous programming patterns including Promises, callbacks, and async/await. You’ll learn not only how to use them, but how JavaScript’s concurrency model, including the event loop and task queues, enables non-blocking code execution—key for performance-critical applications.

In addition to asynchronous programming, the course explores crucial concepts such as closures, lexical scope, context (this), and memory management. These concepts are foundational to writing modular, secure, and reusable code. You will also examine how JavaScript handles garbage collection and how to prevent memory leaks—common problems in long-running applications or SPAs. From optimizing runtime performance to creating cleaner abstractions, these lessons prepare you for building enterprise-grade applications with JavaScript alone.

Another core focus of the course is functional programming, which is increasingly relevant in modern web development. Learners will gain a deep understanding of concepts like immutability, higher-order functions, composition, and currying. You’ll see how these paradigms can help you write cleaner, testable, and scalable code. By working through real-world coding scenarios, you will build confidence in applying these techniques in practical development tasks.

The course also covers the latest ECMAScript (ES6+) features, including destructuring, arrow functions, modules, default parameters, template literals, and spread/rest operators. These features are now an industry standard and are critical for writing clean and efficient code. You'll also work with modern browser APIs, understand advanced event handling mechanisms like event delegation, and explore how to integrate these APIs into robust front-end applications. Special emphasis is placed on writing secure, framework-independent JavaScript that can be reused across projects and tech stacks.

Throughout the course, learning is project-based and hands-on. Each concept is reinforced with exercises, real-world scenarios, and projects that provide learners with a chance to immediately apply what they’ve learned. You’ll explore module bundling, build your own utility libraries, and practice debugging JavaScript using Chrome DevTools and performance profiling tools. These practical experiences help build the confidence and skills necessary for solving real-world development problems.

Upon successful completion, learners will receive a Course Completion Certificate from Uplatz, serving as formal recognition of their advanced skills in JavaScript. This certificate demonstrates mastery of asynchronous code patterns, closures, memory handling, ES6+ syntax, and performance tuning—all critical skills for senior developers and technical leaders. It also signals your ability to work independently of frameworks, which is increasingly valued in complex software environments where framework flexibility is essential.

Whether your goal is to transition into a senior engineering role, specialize as a JavaScript architect, or become a full-stack developer with deep JavaScript knowledge, this course equips you with the necessary tools. By mastering the fundamentals and advanced behaviors of JavaScript, you position yourself as a candidate capable of contributing to performance-optimized and scalable applications. Moreover, this course helps prepare you for technical interviews, offering insight into commonly asked questions and how to approach them using real technical reasoning.

You’ll learn how to prevent memory leaks, manage closures responsibly, debug complex codebases, and use advanced features of JavaScript to write clean, maintainable code. As you complete exercises on topics such as module architecture and browser API integration, you build a portfolio of knowledge and work that demonstrates your capabilities to employers and clients. The skills gained here are transferable across projects and job roles, making this course an investment in long-term career growth.

This course is not just a set of tutorials; it's a pathway to mastery. Designed with flexibility in mind, it offers lifetime access to all video lectures, assignments, downloadable materials, and community support. You can revisit lessons at any time, stay up to date as JavaScript evolves, and continue building your skills at your own pace. And while the course does not require prior knowledge of frameworks, the understanding you gain will make it easier to adopt any framework in the future with confidence and clarity.

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Course Objectives Back to Top

By the end of this course, learners will be able to:

  1. Understand advanced JavaScript features and the internal workings of JavaScript engines.

  2. Apply asynchronous patterns using callbacks, Promises, and async/await.

  3. Master functional programming concepts such as currying, composition, and immutability.

  4. Utilize closures, scopes, and context effectively for modular code.

  5. Handle memory leaks, garbage collection, and optimize runtime performance.

  6. Use ES6+ features including destructuring, spread/rest operators, and modules.

  7. Leverage browser APIs, event delegation, and advanced event handling techniques.

  8. Debug JavaScript using DevTools and profiling tools like Chrome’s performance panel.

  9. Develop secure, performant, and scalable front-end codebases.

  10. Build framework-independent libraries and utilities using vanilla JavaScript.

Course Syllabus Back to Top

JavaScript Programming (advanced) - Course Syllabus

Section 1: Advanced Functions and Functional Programming

  1. Higher-Order Functions
    Explore what higher-order functions are and their applications.
  2. Using map(), filter(), and reduce() in Higher-Order Functions
    Learn how to use these powerful methods in functional programming with examples.
  3. Understanding Closures
    Understand JavaScript closures and their mechanics with examples.
  4. Practical Applications of JavaScript Closures
    Discover real-world scenarios where closures are useful.
  5. JavaScript Function Currying
    Dive into currying and how it simplifies function handling.
  6. Functional Programming and Its Benefits
    Understand the principles of functional programming and its advantages.
  7. Combining Functions for Cleaner Code
    Learn techniques for composing functions to improve code readability.
  8. Immutability and Pure Functions in JavaScript
    Explore how immutability and pure functions enhance JavaScript code.
  9. Using Libraries for Functional Programming
    Discover libraries like Lodash and Ramda for advanced functional programming.

Section 2: Recursion and Algorithm Optimization

  1. Understanding and Implementing Recursive Functions
    Learn how recursion works with factorial and Fibonacci examples.
  2. Tail Recursion Optimization
    Discover the concept of tail recursion and how to optimize recursive calls.
  3. Sorting Algorithms in JavaScript - Quicksort and Mergesort
    Implement and understand sorting algorithms like Quicksort and Mergesort.
  4. Searching Algorithms and Optimization Techniques
    Explore searching techniques like binary search and optimizations.

Section 3: Object-Oriented Programming

  1. JavaScript’s Prototype-Based Inheritance
    Understand prototype inheritance and the ES6 class syntax.
  2. Using Class Syntax for OOP
    Learn modern JavaScript class syntax for object-oriented programming.
  3. Creating Subclasses and Extending Existing Classes
    Explore how to create subclasses and extend classes effectively.
  4. Using the super Keyword Effectively
    Discover how the super keyword is used in JavaScript inheritance.
  5. Defining Private Fields and Methods in ES6+
    Understand private fields and methods for encapsulation in classes.
  6. Reusing Code Across Classes Using Mixins
    Learn how mixins can help you reuse code across multiple classes.

Section 4: Asynchronous JavaScript

  1. Understanding Promises
    Explore promises and their role in asynchronous programming.
  2. Chaining Promises and Managing Complex Async Workflows
    Learn how to chain promises to handle complex workflows.
  3. Error Handling with Promises
    Best practices for managing errors in promise chains.
  4. Writing Cleaner Asynchronous Code
    Discover how to write elegant asynchronous code using async/await.
  5. Handling Errors in Async/Await
    Manage async/await errors using try...catch effectively.
  6. Creating and Using Async Iterators
    Work with data streams using async iterators.
  7. Differences Between Concurrency and Parallelism
    Understand concurrency and parallelism concepts in JavaScript.
  8. How Asynchronous Code is Handled in JavaScript
    Learn about event loops, microtasks, and macrotasks.
  9. Handling Errors Using try...catch
    Master error-handling strategies using try...catch.
  10. Tutorial on Fetch API and Axios Library
    Learn to fetch data with Fetch API and Axios.
  11. RESTful API Integration with JavaScript
    Integrate REST APIs into JavaScript applications.

Section 5: Debugging and Performance Optimization

  1. Using Browser Developer Tools Effectively
    Learn to debug and monitor performance with browser tools.
  2. Debugging Using Breakpoints and Call Stacks
    Understand debugging techniques like breakpoints and call stacks.
  3. Input Validation and Code Safety Checks
    Validate inputs and ensure safe, secure JavaScript code.
  4. Optimizing Performance with Large Datasets
    Handle and optimize large datasets efficiently.
  5. Memory Management and Leaks
    Learn about memory leaks and how to prevent them.
  6. Optimizing Loops and Operations
    Discover best practices for optimizing loops and repetitive tasks.
  7. Lazy Loading and Code Splitting
    Learn how lazy loading and code splitting improve performance.

Section 6: Advanced JavaScript Features

  1. JavaScript Sets and Maps
    Explore Sets and Maps for efficient data storage and retrieval.
  2. WeakMap and WeakSet
    Understand WeakMap and WeakSet and their use cases.
  3. Destructuring and Rest-Spread Operators
    Simplify code using destructuring and spread/rest operators.
  4. Template Literals and Tagged Templates
    Learn advanced string manipulation with template literals and tagged templates.
  5. JavaScript Modules (ES6)
    Understand how to use ES6 modules for modular development.
  6. JavaScript Iterators and Generators
    Implement and use iterators and generators effectively.
  7. JavaScript Proxy and Reflect
    Master Proxy and Reflect for meta-programming tasks.
  8. Techniques for Manipulating Nested Structures
    Learn advanced techniques for handling nested objects and arrays.

Section 7: Practical Applications and Projects

  1. Building Reusable Components Using JavaScript
    Create reusable components for frameworks like React and Vue.
  2. Handling CORS and JSON in JavaScript
    Learn best practices for working with CORS and JSON data.
  3. Expense Tracker App
    Build an expense tracker app using advanced JavaScript concepts.
  4. Advanced JavaScript Capstone Project
    Work on a project to consolidate your advanced JavaScript knowledge.

Section 8: Patterns, Testing, and Standards

  1. Declarative vs Imperative Programming
    Understand these paradigms with examples.
  2. Design Patterns in JavaScript
    Learn and implement common design patterns.
  3. Coding Standards and Linting in JavaScript
    Maintain clean and consistent code using ESLint and similar tools.
  4. Testing JavaScript Code with Jest and Mocha
    Write and test JavaScript applications with Jest and Mocha.

Section 9: Promises, Error Handling, Memory Optimization

  1. Understanding Promise
    Deep dive into JavaScript promises.
  2. Custom Error Objects and Extending the Error Class
    Learn to create and extend custom error objects.
  3. Error Propagation and Re-Throwing Errors
    Understand how to propagate and rethrow errors effectively.
  4. Code Profiling and Benchmarking with JavaScript
    Analyze and benchmark JavaScript code performance.
  5. Handling Errors in Nested Promises
    Manage errors in complex promise chains effectively.
  6. Memory Optimization Techniques
    Discover memory optimization techniques in JavaScript.

Section 10: Interview Preparation

  1. Advanced JavaScript Interview Questions
    Practice answering interview questions on advanced JavaScript topics.

 

Certification Back to Top

Upon successful completion of the JavaScript Programming (Advanced) course, learners will receive a Course Completion Certificate from Uplatz, verifying their mastery of high-level JavaScript programming skills.

This certification demonstrates your proficiency in modern JavaScript concepts, including asynchronous programming, closures, functional patterns, and memory optimization. It affirms your ability to write clean, efficient, and scalable code independent of frameworks—an essential skill for any senior frontend or full-stack developer.

You will have proven your capability to build and debug real-world web applications using ES6+ syntax, understand the JavaScript event loop and execution contexts, manage modular architecture, and integrate with browser APIs securely and efficiently.

The certificate signals to employers and teams that you’re not only technically sound but also prepared to take on performance-critical, scalable development projects. It enhances your portfolio and boosts your credibility when applying for roles such as JavaScript Engineer, Technical Lead, or Web Performance Architect.

In a fast-evolving web ecosystem, this certification sets you apart by highlighting your commitment to understanding JavaScript beyond surface-level usage. Add it to your resume, GitHub, and LinkedIn profile to showcase your advanced skills and gain a competitive edge in the job market.

 

Career & Jobs Back to Top

Advanced JavaScript developers are in high demand across tech companies, startups, SaaS firms, and enterprise-level web platforms. Mastering JavaScript at an advanced level opens up career opportunities in both frontend and full-stack domains.

Career roles include:

  • Senior JavaScript Developer

  • JavaScript Architect

  • Front-End Performance Engineer

  • JavaScript Security Specialist

  • Full Stack Engineer (JavaScript)

  • Technical Lead – Web Development

  • UI/UX Developer with JavaScript Expertise

Whether you’re aiming for leadership roles or framework-agnostic JavaScript mastery, this course gives you the tools to elevate your career trajectory.

 

Interview Questions Back to Top
  1. What is the difference between synchronous and asynchronous JavaScript?
    Synchronous code blocks execution until it finishes. Asynchronous code executes in the background using callbacks, Promises, or async/await, enabling non-blocking behavior.
  2. How does the event loop work in JavaScript?
    It processes the call stack and handles asynchronous tasks from the callback queue, enabling non-blocking execution of code.
  3. Explain closures and how they are used in JavaScript.
    A closure gives a function access to its lexical scope even after the outer function has returned. It is useful for creating private variables and function factories.
  4. What is the difference between call, apply, and bind?
    All set the this context. call and apply invoke functions immediately, with apply accepting an array of arguments. bind returns a new function with bound context.
  5. What are the key features introduced in ES6?
    Arrow functions, template literals, let and const, destructuring, default parameters, classes, modules, and Promises.
  6. What are JavaScript modules and why are they useful?
    Modules encapsulate code for reusability and maintainability. They can be imported/exported using import/export in ES6.
  7. What is debouncing and throttling?
    Debouncing delays function execution until after a pause; throttling limits the number of times a function executes in a time frame—both are used to improve performance.
  8. How do you prevent memory leaks in JavaScript?
    By clearing intervals/timeouts, removing unused event listeners, avoiding global variables, and dereferencing objects in closures.
  9. What is the difference between deep copy and shallow copy?
    A shallow copy duplicates only the top-level object. A deep copy recursively clones nested objects, preventing shared references.
  10. How would you debug performance issues in JavaScript?
    Using Chrome DevTools’ Performance tab, memory profiling, and logging execution time with console.time() and console.timeEnd().  
Course Quiz Back to Top
Start Quiz
Q1. What are the payment options?
A1. We have multiple payment options: 1) Book your course on our webiste by clicking on Buy this course button on top right of this course page 2) Pay via Invoice using any credit or debit card 3) Pay to our UK or India bank account 4) If your HR or employer is making the payment, then we can send them an invoice to pay.

Q2. Will I get certificate?
A2. Yes, you will receive course completion certificate from Uplatz confirming that you have completed this course with Uplatz. Once you complete your learning please submit this for to request for your certificate https://training.uplatz.com/certificate-request.php

Q3. How long is the course access?
A3. All our video courses comes with lifetime access. Once you purchase a video course with Uplatz you have lifetime access to the course i.e. forever. You can access your course any time via our website and/or mobile app and learn at your own convenience.

Q4. Are the videos downloadable?
A4. Video courses cannot be downloaded, but you have lifetime access to any video course you purchase on our website. You will be able to play the videos on our our website and mobile app.

Q5. Do you take exam? Do I need to pass exam? How to book exam?
A5. We do not take exam as part of the our training programs whether it is video course or live online class. These courses are professional courses and are offered to upskill and move on in the career ladder. However if there is an associated exam to the subject you are learning with us then you need to contact the relevant examination authority for booking your exam.

Q6. Can I get study material with the course?
A6. The study material might or might not be available for this course. Please note that though we strive to provide you the best materials but we cannot guarantee the exact study material that is mentioned anywhere within the lecture videos. Please submit study material request using the form https://training.uplatz.com/study-material-request.php

Q7. What is your refund policy?
A7. Please refer to our Refund policy mentioned on our website, here is the link to Uplatz refund policy https://training.uplatz.com/refund-and-cancellation-policy.php

Q8. Do you provide any discounts?
A8. We run promotions and discounts from time to time, we suggest you to register on our website so you can receive our emails related to promotions and offers.

Q9. What are overview courses?
A9. Overview courses are 1-2 hours short to help you decide if you want to go for the full course on that particular subject. Uplatz overview courses are either free or minimally charged such as GBP 1 / USD 2 / EUR 2 / INR 100

Q10. What are individual courses?
A10. Individual courses are simply our video courses available on Uplatz website and app across more than 300 technologies. Each course varies in duration from 5 hours uptop 150 hours. Check all our courses here https://training.uplatz.com/online-it-courses.php?search=individual

Q11. What are bundle courses?
A11. Bundle courses offered by Uplatz are combo of 2 or more video courses. We have Bundle up the similar technologies together in Bundles so offer you better value in pricing and give you an enhaced learning experience. Check all Bundle courses here https://training.uplatz.com/online-it-courses.php?search=bundle

Q12. What are Career Path programs?
A12. Career Path programs are our comprehensive learning package of video course. These are combined in a way by keeping in mind the career you would like to aim after doing career path program. Career path programs ranges from 100 hours to 600 hours and covers wide variety of courses for you to become an expert on those technologies. Check all Career Path Programs here https://training.uplatz.com/online-it-courses.php?career_path_courses=done

Q13. What are Learning Path programs?
A13. Learning Path programs are dedicated courses designed by SAP professionals to start and enhance their career in an SAP domain. It covers from basic to advance level of all courses across each business function. These programs are available across SAP finance, SAP Logistics, SAP HR, SAP succcessfactors, SAP Technical, SAP Sales, SAP S/4HANA and many more Check all Learning path here https://training.uplatz.com/online-it-courses.php?learning_path_courses=done

Q14. What are Premium Career tracks?
A14. Premium Career tracks are programs consisting of video courses that lead to skills required by C-suite executives such as CEO, CTO, CFO, and so on. These programs will help you gain knowledge and acumen to become a senior management executive.

Q15. How unlimited subscription works?
A15. Uplatz offers 2 types of unlimited subscription, Monthly and Yearly. Our monthly subscription give you unlimited access to our more than 300 video courses with 6000 hours of learning content. The plan renews each month. Minimum committment is for 1 year, you can cancel anytime after 1 year of enrolment. Our yearly subscription gives you unlimited access to our more than 300 video courses with 6000 hours of learning content. The plan renews every year. Minimum committment is for 1 year, you can cancel the plan anytime after 1 year. Check our monthly and yearly subscription here https://training.uplatz.com/online-it-courses.php?search=subscription

Q16. Do you provide software access with video course?
A16. Software access can be purchased seperately at an additional cost. The cost varies from course to course but is generally in between GBP 20 to GBP 40 per month.

Q17. Does your course guarantee a job?
A17. Our course is designed to provide you with a solid foundation in the subject and equip you with valuable skills. While the course is a significant step toward your career goals, its important to note that the job market can vary, and some positions might require additional certifications or experience. Remember that the job landscape is constantly evolving. We encourage you to continue learning and stay updated on industry trends even after completing the course. Many successful professionals combine formal education with ongoing self-improvement to excel in their careers. We are here to support you in your journey!

Q18. Do you provide placement services?
A18. While our course is designed to provide you with a comprehensive understanding of the subject, we currently do not offer placement services as part of the course package. Our main focus is on delivering high-quality education and equipping you with essential skills in this field. However, we understand that finding job opportunities is a crucial aspect of your career journey. We recommend exploring various avenues to enhance your job search:
a) Career Counseling: Seek guidance from career counselors who can provide personalized advice and help you tailor your job search strategy.
b) Networking: Attend industry events, workshops, and conferences to build connections with professionals in your field. Networking can often lead to job referrals and valuable insights.
c) Online Professional Network: Leverage platforms like LinkedIn, a reputable online professional network, to explore job opportunities that resonate with your skills and interests.
d) Online Job Platforms: Investigate prominent online job platforms in your region and submit applications for suitable positions considering both your prior experience and the newly acquired knowledge. e.g in UK the major job platforms are Reed, Indeed, CV library, Total Jobs, Linkedin.
While we may not offer placement services, we are here to support you in other ways. If you have any questions about the industry, job search strategies, or interview preparation, please dont hesitate to reach out. Remember that taking an active role in your job search process can lead to valuable experiences and opportunities.

Q19. How do I enrol in Uplatz video courses?
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e) Start learning: After payment, your course will be added to your profile in the student dashboard under "Video Courses".

Q20. How do I access my course after payment?
A20. Once you have made the payment on our website, you can access your course by clicking on the "My Courses" option in the main menu or by navigating to your profile, then the student dashboard, and finally selecting "Video Courses".

Q21. Can I get help from a tutor if I have doubts while learning from a video course?
A21. Tutor support is not available for our video course. If you believe you require assistance from a tutor, we recommend considering our live class option. Please contact our team for the most up-to-date availability. The pricing for live classes typically begins at USD 999 and may vary.
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