This Intermediate JavaScript course takes your skills to the next level, helping you to build dynamic apps using today’s essential programming concepts. Gain practical, job-ready experience in just two days and learn how to build modern, managed JavaScript applications that exploit modern syntax.
Intermediate JavaScript
Build capability with modern JavaScript skills in a practical environment
Gain a deeper understanding of JavaScript with this two-day course. You’ll learn key intermediate concepts like closures, async programming, modules, and testing to improve your code structure, readability and performance. Discover how to devise object-oriented and functional solutions to problems and deal with asynchronous tasks such as IO.
Learning objectives
- Use modern syntax and operators
- Understand JavaScript scope and closures
- Apply object-oriented techniques
- Leverage functional programming concepts
- Handle asynchronous programming
- Build structured, manageable apps
- Write and run effective tests
What you’ll learn
You’ll explore advanced JavaScript features and methodologies, focusing on clean, maintainable code and practical applications through guided hands-on exercises. You’ll move on from the fundamentals to become confident with managed apps and testing.
Modern syntax and data structures
Master ES6+ features including destructuring, spread/rest operators, optional chaining, and logical assignment. Explore Sets and Maps to organise and retrieve data more effectively. You’ll gain practical experience writing cleaner, more efficient code while adopting syntax that reduces repetition and improves readability, ensuring your applications follow modern JavaScript practices.
Scope and closures
Develop a deeper understanding of scope, lexical environments, and closures. Learn how variables are created, accessed and retained across functions and contexts, while using IIFEs and the scope chain effectively. By mastering these concepts, you’ll be able to structure JavaScript code that is both predictable and maintainable.
Object-oriented programming
Work with JavaScript’s object-oriented features including classes, constructors, inheritance, encapsulation, and prototypes. Understand when to use composition over inheritance, and how to leverage static members for reusable structures. This module strengthens your ability to create scalable, reusable code that simplifies project management and development workflows.
Functional programming
Explore the principles of functional programming, from pure functions and immutability to higher-order functions and callbacks. Practise transforming arrays using map, filter, and reduce to write concise, expressive code. These techniques help ensure your applications are easier to test, extend and maintain, particularly in large-scale projects.
What’s included
- Two days of live virtual classroom training
- Practical, hands-on labs
- Experienced instructor guidance
- Interactive Q&A and discussions
- Course notes and reference materials
- Real-time feedback and support
- Completion certificate
Key facts
Ideal for
Developers with basic JavaScript skills looking to expand their knowledge and skills.
Prerequisites
This course is for those already comfortable with JavaScript fundamentals, DOM manipulation, and basic HTML/CSS.
Learning experience
Our experienced trainers and interactive labs create a focused, practical environment – so you can put theory into practice from day one.
FAQs
This practical course provides intermediate-level JavaScript training, focusing on core programming practices, object orientation, asynchronous operations, and app development with real-world applications.
What technical topics does the Intermediate JavaScript course cover?
The course builds on JavaScript fundamentals and introduces modern ES6+ features, object-oriented programming, functional programming techniques, asynchronous handling with Promises and async/await, module systems, and testing. Each concept is explored through hands-on exercises, ensuring you can apply new syntax and patterns directly to real projects.
How will I use modern JavaScript syntax in practice?
You’ll learn destructuring, spread/rest operators, optional chaining, and enhanced object literals, all tools that simplify data handling and reduce code complexity. These features are widely used in frameworks like React, Angular and Node.js, so you’ll be able to work more efficiently with modern development stacks.
Why is learning about closures and scope important?
Closures and scope are core to how JavaScript handles variables and memory. Understanding them allows you to write predictable, modular code, build private functions, and avoid common bugs. These skills are especially valuable when designing scalable applications or working with complex asynchronous tasks.
What level is this JavaScript course suitable for?
It’s aimed at developers who are comfortable with JavaScript basics and want to take the next step toward more advanced techniques.
Do I need to have completed a previous course?
We recommend completing the Core JavaScript course or having equivalent experience using JavaScript in real projects.
What our customers say
“Great course. Alan has been courteous and informative throughout. Highly recommended and will absolutely be coming back for more courses.”
Bradley, Software Engineer – Government
“I really enjoyed this course, it was clear the instructor had in-depth knowledge about the subject and was keen on answering questions / explaining problems thoroughly. I also appreciated learning about the principles, best practice standards, and the reasoning behind these.”
Michaela, Data Scientist - Government
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