JavaScript course
Step by step
to mastery
You will learn basic programming principles, build a programmatic mindset, and open doors to the world of frontend development.
Start now
Access to the
course 24/7
Practical
assignments
Experienced
tutors
Certificate of Professional
Development
JavaScript is the most
popular programming
language.
Once you master it, you can easily start a career in web development. It is a great start for aspiring developers who want to enter the IT sphere.

It is in demand, easy enough to learn, and suitable for a variety of tasks such as creating websites and applications.
JavaScript developers are in demand in a variety of fields:
Frontend development
Gamedev
Backend development
Machine Learning
JavaScript developer has
a steadily growing income
>18,000 of our graduates work
in companies
>7460 jobs on linkedin
18-55 years old our
students
Who would benefit from this course
Beginners developers
Systematize and expand your knowledge, practice practical skills, strengthen your portfolio with significant projects and start feeling confident in your profession.
Developers in other languages
Expand your competencies, learn a new programming language and increase your value on the labor market as a specialist.
Allied IT professionals
Master programming, apply new skills in your current profession or go into development completely.
Freelancers
Master new programming languages and technologies to expand your services and attract more clients.
What you will learn
  • Create complete web applications using JavaScript.
  • Master the basic concepts of JavaScript.
  • Know how to work with functions, arrays, strings, and objects.
  • Implement loops, sorts, and data filtering.
  • Understand how JavaScript functions.
  • Recognize the mechanism of the call stack.
  • Work with execution context and the this keyword.
  • Create closures and understand their principles.
  • Interact with the Document Object Model (DOM).
  • Process data received from forms.
  • Store data in Local Storage.
How will you study?
Comfortable training
A convenient text format and live examples make it easy to study theory and master the material step by step, even from your phone.
Convenient format
Online learning allows you to study from anywhere in the world at any time of the day, providing flexibility and comfort for your schedule.
Experienced curators
Our curators are professionals with extensive experience who are ready to share their knowledge.
Practice
Practical tasks await you that will help you consolidate your acquired knowledge and skills.
Preparing for the interview
The course includes preparation for important interview questions.
Our team of experts
Anna Smirnova
Web Development Expert
Specializes in creating interactive applications using JavaScript. Works with clients all over the world and has many successful projects on Upwork platform. Chose JavaScript for its versatility and broad capabilities. Life slogan - “Every day is a new opportunity. Use it!”
Dmitry Kovalev
Frontend Developer
Works with clients from Europe and Asia, has TOP Rated status on Upwork. Passionate about JavaScript because of its flexibility and powerful tools for creating user interfaces. Her slogan in life is “Don't be afraid to experiment, that's where success is born!”.
Elena Vyal
JavaScript Specialist
Focuses on web application development and API interaction. Works with clients from different parts of the world and actively shares her experience on professional forums. Chose JavaScript for its agility and relevance. Life slogan is “Knowledge is power, share it!”.
Sergey Krylov
Software Developer
Experienced in JavaScript and its frameworks, actively collaborates with US clients. Considered an expert in application performance optimization. Life slogan - “Every project is an opportunity to become better!”
Maria Zhar
Web Engineer
Works with clients from Russia and CIS, has TOP Rated status on Upwork. Passionate about JavaScript for its ability to create dynamic and responsive interfaces. Life slogan - “Strive for perfection and success will not keep you waiting!”
What you will learn
Module 1: Preparation
  • How to take the course. Downloading materials
  • Install the necessary software
  • Stay in touch with me
Module 2: JavaScript Fundamentals
  • Welcome to the Hollo world club!
  • How JavaScript works
  • Are semicolons important? How do I create comments?
  • What are variables
  • More about variables
  • TEST YOURSELF: Knowing Variables
  • What are “expressions” and “instructions”
  • Data Types
  • Features of numbers and strings
  • TEST YOURSELF: Data Types
  • Introduction to operators. Mathematical operators “+” “-” “*” “/”
  • How Comparison Operators “>” “==” “!=” work
  • TEST YOURSELF: Comparison Operators
  • Operator prioritization
  • Data type conversion
  • Standard objects. Summarize and repeat.
  • PRACTICE-1. Create a body index calculator
  • PRACTICE-2. Create a love randomizer
  • Introduction to If Else. Conditional branching
  • How logical operators “!” “??” work “&&” ”
  • test yourself: Logical operators.
  • How the ternary operator “?” works
  • The final word of this unit
Module 3. Chat GPT mini-course
  • Overview of neural networks
  • The best models of artificial intelligence today
  • How to pay for a Chat GPT subscription
  • Chat GPT tariffs overview
  • Chat GPT program for different operating systems
  • Using Chat GPT for training
  • Using Chat GPT for programming
  • Where else Chat GPT is useful
  • How to show screen to Chat GPT
  • Generating images with Chat GPT and more
  • Advanced Voice mode in Chat GPT
  • How GitHub's Copilot work
Module 4. Diving into JavaScript basics. Functions and Objects
  • Use Strict
  • Introduction to functions
  • Function Expression and Function Declaration
  • Scopes in JS
  • TEST YOURSELF: Scopes
  • Default values for function parameters
  • What are callBack functions
  • How arrow functions work
  • PRACTICE-3. Winner's calculator
  • What are objects
  • Nested properties of objects
  • Abbreviated property notation
  • Creating functions in objects and a little bit about this
  • PRACTICE-04. Create a BMI calculator using objects
  • Introduction to arrays
  • “Methods” of arrays
  • Introduction to the for loop
  • Break & Continue in For loops
  • While Do While loop
  • Copying objects.
  • PRACTICE-5-Create a Fibonacci sequence
  • TEST YOURSELF. JS basics test
  • The final word of this unit
Module 5. Basics of working with DOM
  • Prettier and how “snippets” work.
  • What is DOM and JS Environment
  • Getting HTML Elements
  • What are HTML nodes and element affinity
  • What is a pseudo array
  • How the for of and for in loops work
  • Getting and changing tag contents
  • Creating and inserting new DOM elements
  • How InsertAdjastmentHTML works
  • Cloning, moving and deleting elements
  • Changing CSS styles with JS
  • Getting and changing DOM element attributes
  • What is an event handler on a page
  • How to add audio playback when an event is triggered
  • PRACTICE - 6. Create a guess the number game
  • PRACTICE - 7. Create modal windows
  • PRACTICE - 8. Create an alphabet game
  • TEST YOURSELF. D.O.M. test.
  • Final Word
Module 6. Advanced work with data
  • What this unit is about
  • How the context of calling this works
  • Array destructuring
  • Object destructuring
  • How the spread operator works
  • What is the rest operator
  • PRACTICE-9. Destructurization, rest and spread
  • What are classes in JS
  • What is Set
  • What is Map
  • Conversion of data structures
  • PRACTICE-10. Map and Set
  • Final word
Module 7. Working with strings
  • How strings work. Slice methods
  • Methods of strings ch. 2. (trim, toLowerCase, replace)
  • String methods ch. 3 (Split / Join)
  • PRACTICE-11. Working with strings
Module 8. Working with functions
  • Default function parameters
  • Objects as function parameters
  • Higher order and first class functions
  • Returning a function from a function
  • Function method call
  • Function method bind
Module 9. Working with Arrays
  • What this unit is about
  • Basic array methods
  • How forEach works
  • forEach on Map and Set
  • Starting to create an application
  • Map() method
  • Map() in practice
  • Filter() method
  • Reduce() method
  • PRACTICE-12. Filter/ map/ reduce
  • Applying methods on the page
  • Find() method
  • LogIn to account
  • Transfer funds from an account
  • FindIndex() method
  • Some() and every() methods
  • Flat() method
  • Sort() method
  • The fill() and Array.from() methods
  • PRACTICE-13. Array Methods
  • Block Conclusion
Module 10. Numbers and Dates
  • Basic methods of numbers
  • What is bigInt
  • How to create a date
  • Setting dates in a banking application
  • Expressions with dates
  • Date formats of different countries
  • Number formats of different countries
  • SetInterval and SetTimer
  • Final word
Module 11. Getting deeper into working with DOM
  • What this unit is about
  • Live VS Static Collections
  • Element Coordinates
  • Cancel and Popup Events
  • Delegating Events
  • Creating tabs
  • Create transparent menus
  • Intersection API
  • Apply Intersection on sections
  • Apply Intersection on images
  • Create slider
  • Finalize slider
  • 3 ways to connect the script to the site
  • Conclusion
Module 12. Object-oriented programming
  • Re-download the course materials
  • What are function constructors
  • The difference between prototype and proto
  • PRACTICE-14. - Create function constructors
  • The difference between classes and function constructors
  • What are getters
  • What are setters
  • PRACTICE-15. Classes, getters and setters
  • What are static methods
  • Object.create()
  • Creating child classes
  • PRACTICE-16. Create a child class
  • Create child classes through class syntax
  • What is API
  • Variables in classes
  • Property encapsulation
  • Property encapsulation is the new standard
  • Creating a chain of methods
  • Summarize what we have learned
  • PRACTICE-17. Subsidiary classes through class syntax
  • Check yourself. Test on the topic.
  • Final word
Module 13.Object Oriented Programming in Practice
  • What this project is about
  • What are function constructors
  • The difference between prototype and proto
  • PRACTICUM-14. - Create function constructors
  • The difference between classes and function constructors
  • What are getters
  • What are setters
  • PRACTICE-15. Classes, getters and setters
  • What are static methods
  • Object.create()
  • Creating child classes
  • PRACTICE-16. Create a child class
  • Create child classes through class syntax
  • What is API
  • Variables in classes
  • Property encapsulation
  • Property encapsulation is the new standard
  • Creating a chain of methods
  • Summarize what we have learned
  • PRACTICE-17. Subsidiary classes through class syntax
  • Check yourself. Test on the topic.
  • Final word
Module 14. Asynchronous code
  • What is asynchronous code
  • How XMLHTTRequest works
  • Connecting to API
  • Call-back hell
  • Introduction to fetch & promise
  • How promise works in a chain
  • Error handling in promise
  • Handling server errors
  • PRACTICE-18. Using external APIs
  • What is promissification
  • Code execution queue
  • Promissification part 2
  • How async/await works
  • Handling try catch errors
  • Returning data from async/await
  • Parallel execution
  • Additional methods of parallel code
Module 15. Conclusion
  • See you again!
Validation of your skills
At the end of the course, you will receive a standard certificate, which confirms your skills and will be an additional argument for the employer.
We've prepared flexible tariff plans
choose the most suitable one for your purposes without overpaying.
Introductory
Training program 2 modules Lecture materials Practical homework Chat for students No feedback Access to the course - 1 month Without certificate
$11
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Individual
Training program - 15 modules Lecture material Practical assignments Student chat No checking of assignments No feedback Access to the course - 3 months Without certificate
$20
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Standard
Training program - 15 modules Lecture materials Practical assignments Student chat Chat with mentor Access to the course - 6 months Certificate
$37
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VIP
Training program - 15 modules Lecture materials Practical assignments Chat for students Mentor feedback Mentor's recommendations Access to the course - 12 months Certificate
$45
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Corporate
Groups of at least 5 people Training program - 15 modules Participation in the corporate project Mentor support Access for 12 months Add to group chat Certificate
$500
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Why choose our course?
Experience
For 5 years, we have been building connections with the commercial development industry, training aspiring professionals and watching them become highly skilled professionals.
Research
Before launching a course, we thoroughly analyze the market to ensure it provides relevant and in-demand professional skills.
Methodology
We actively engage with the web development community, which gives us a better understanding of how to teach effectively. We aim to minimize the time it takes to go from theoretical knowledge to practical solutions to standard tasks.
Testimonials from our alumni
Stepan
The course exceeded all my expectations! The instructors did an excellent job of explaining the material, and the practical assignments helped to consolidate the knowledge. I feel confident in JavaScript and ready for new projects. Thank you for your support and motivation!
Zarina
I really enjoyed the course! The information was presented in an accessible and interesting way. I especially appreciate the opportunity to ask questions and get feedback. Now I am ready for new challenges!
Igor
The course turned out to be a real eye-opener for me. I learned not only the basics of JavaScript, but also many subtleties that seemed complicated before. The tutors were always in touch and helped in difficult moments. I recommend it to everyone who wants to develop in web development!
Christina
Great course! I got not only theoretical knowledge, but also practical skills that I could immediately apply in my projects. The support from the tutor was top-notch!
Dmitry
The course was very informative and rich. I especially appreciate the practical assignments that helped me to consolidate the studied material. Thank you!
Money back guarantee if
the course is not suitable
We are confident in the quality of our training and offer you the opportunity to return your money at any time. During the first three lessons you will receive a full refund, and from the fourth lesson onwards we will offer you a refund calculation or help you choose an alternative course that better suits your needs.
Java Script is your
pass to the IT field.
Become a sought-after developer and discover a world of opportunities and stable income!
Question - answer
If I have never programmed before, is the course suitable for me?
The course is suitable even for those who have never encountered JavaScript or other programming languages before and have only basic knowledge of html and css, which are necessary for the final project. However, they are not required.
Will I get a certificate at any rate?
The certificate is issued after all tasks have been checked, i.e. on Standard, VIP and Corporate tariffs with feedback. The certificate will be sent to you after completion of the course to the e-mail specified during registration.
How much time do I need to devote to studying?
We recommend allocating 10 to 20 hours per week to the course to keep it moving at a good pace.
What is the difference between JavaScript and Java?
Both programming languages have their strengths, but they are designed for different tasks. JavaScript stands out for its ability to make web development more accessible and dynamic, while Java is a powerful language used to build large and complex applications and systems.