Introduction to JavaScript
Learn core JavaScript from scratch: syntax, logic, arrays, functions, objects, events, DOM, AJAX and client-side data storage. A solid foundation for front-end development.
Oleksii Anzhiiak
Software Architect, Senior .NET Engineer & Co-Founder
By the end you'll be able to
- Write clean JavaScript code from scratch
- Build interactive web pages
- Work with browser APIs
- Handle user events and forms
- Prepare for React or frontend frameworks
Is this course for you?
This is right for you if you…
- You finished HTML/CSS and the next gap is 'how do I make this page actually do things'
- You want to do frontend OR Node backend — JavaScript covers both. One language, two careers
- You've tried to learn React without learning JS first and felt like you were copy-pasting tutorials. This fixes that
Don't take this course if you…
- You don't know HTML/CSS yet — start there. JS without context is just a syntax dump
- You want only TypeScript — TS is JS plus types; you can't skip the JS half. Take this course first, then #17
- You expect to write 'just frontend' without learning a real language — frontend in 2026 is JavaScript-the-language. There's no shortcut
Who teaches this
Oleksii Anzhiiak
Software Architect, Senior .NET Engineer & Co-Founder
Oleksii Anzhiiak is a Software Architect, Senior .NET Engineer, and Co-Founder of ToyCRM.com and ProfectusLab. With over 15 years of experience, he specializes in distributed systems, cloud infrastructure, high-load backend development, and identity platforms. Oleksii designs complex architectures, builds secure authentication systems, and develops modern engineering education programs that help students achieve real career results.
Currently leads architecture for ToyCRM.com — a multi-tenant CRM platform built on .NET by our team. The same patterns and design decisions used there appear directly in the courses: identity & auth, distributed services, code review culture. You learn from engineers actively shipping production code, not from a textbook.
Syllabus
This course covers the core concepts and everyday tools of JavaScript:
- 1 Module 1: Introduction to JavaScript
- 2 Module 2: Logical Structures (if, switch, loops)
- 3 Module 3: Arrays
- 4 Module 4: Functions
- 5 Module 5: Objects
- 6 Module 6: Constructors and Prototypes
- 7 Module 7: Working with the Document (DOM)
- 8 Module 8: Working with Browser Windows
- 9 Module 9: CSS and JavaScript Interaction
- 10 Module 10: Events and Event Handling
- 11 Module 11: Forms and Form Elements
- 12 Module 12: Cookies and Client-side Storage
- 13 Module 13: Working with Graphics on the Client Side
- 14 Module 14: Ajax and Working with HTTP
Prerequisites
Basic computer skills and willingness to learn. Course materials will guide you step by step.
Basic HTML and CSS knowledge recommended.
What you'll build
You leave with the language under React, Vue, Node, and every other 'JS framework' — closures, prototype chain, event loop, async/await — all from real exercises, not memorised facts. Skip this and React feels like magic; learn this and React feels like sensible decisions.
- JavaScript syntax and data types
- Logical structures and loops
- Arrays and objects
- Functions and prototypes
- DOM manipulation
- Event handling
- AJAX and HTTP requests
- Client-side storage
Where this fits in your career
Read alongside this course
First lesson on us. Decide after meeting your instructor.
Sit in on the first session. If after lesson 1 you decide the instructor isn't the right fit, you don't pay for it — and no awkward conversation. (Trial offer applies to courses with more than 5 lessons; this one qualifies.)
Pricing & what's included
What's included
- 14 live sessions × 2 hours each — taught by the instructor, not a recording playback
- Slide deck for every session — yours to keep and refer back to
- Working code files and any data files used in class — cloned to your machine
- Weekly homework with personal code review from the instructor
- Recording on request — give the teacher a heads-up ("can't make Tuesday, please record it") and the session is recorded for you
Frequently asked questions
How much time per week will this take?
Plan for the live sessions plus roughly 1.5–2 hours of practice per session. Most students who finish on schedule put in 4–6 hours a week total. If you put in less, you still finish — it just takes longer.
What if I miss a class?
Tell the teacher BEFORE the session — "I can't make Tuesday, please record it" — and the teacher records that lesson and sends it to you. Recordings aren't a default catch-up archive; they're produced on request when you give a heads-up. After the lesson you do the homework, bring questions to the next session.
What's included in the price?
Live sessions with the teacher; the slide deck for each session (yours to keep); the working code files and any data files used in class; weekly homework with code review; and recordings of the sessions you give advance notice for. Anything beyond that — a certificate, alumni access, mock interviews — is listed explicitly in "What's included" above the FAQ for the courses where it applies.
What if I sign up and the teacher isn't a fit?
For courses with more than 5 lessons, the first session is effectively a trial — if after lesson 1 you decide the teacher isn't a fit, you don't pay for it. We'd rather you walk away after one lesson than push through 9 weeks of bad chemistry. (Courses with 5 or fewer lessons are short enough that the standard pricing applies — the trial offer doesn't make sense at that length.)
Can I get a refund partway through?
Yes, while more than half the course is still unused — i.e. you've attended fewer than 50% of the lessons. The refund covers the unused portion proportionally. Past the halfway point we don't refund, on the assumption that the value has been delivered.
Can I switch the language of instruction?
The live sessions run in the language listed under "Available Languages" above. Slides and code files are typically available in all four (English, Russian, Ukrainian, Georgian). Many students attend sessions in one language and read materials in another — that's normal.
Will I be ready for a real job after this course?
One course rarely gets anyone hired by itself — for any field. What this course gives you is the foundation a junior hiring manager expects: working code you wrote yourself, the vocabulary to read other people's code, and the practice habits that make you employable. The honest answer to "am I ready?" is on our roadmap (link in the page header) — open the level you want to reach and read the "You're ready when" checklist.
Can I pay in instalments?
Yes for courses with a "Monthly Payment" option in the at-a-glance ribbon — usually two or three equal monthly payments. Courses without that option are paid in one go. If the price is the blocker, write to us — we look at every case.