⭐ Recommended React.js Essentials
Build modern, interactive UIs with React. Learn components, hooks, state management, routing, API integration, and deploy real projects. The natural next step after JavaScript.
Oleksii Anzhiiak
Software Architect, Senior .NET Engineer & Co-Founder
By the end you'll be able to
- Build production-grade React applications with hooks and component composition
- Manage state without losing your mind (useState, useReducer, context, server state)
- Wire up routing, forms, and data fetching the way real teams do it
- Identify and fix the most common React performance traps
- Pass the React-specific portion of a frontend interview
Is this course for you?
This is right for you if you…
- You know JavaScript and you're aiming at junior frontend roles — React is in 70%+ of the job ads
- You've tried React tutorials and they showed components in isolation — you want to see how a whole app fits together
- You're switching from another frontend framework and want to absorb React's mental model fast
Don't take this course if you…
- You don't know JavaScript yet — React without JS feels like magic. Take #11 first
- You want a comprehensive comparison of React vs Vue vs Svelte — this is a React-specific deep-dive, not a survey
- You want native mobile / desktop — React Native and Electron exist but aren't covered here. This is web React
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 everything you need to build production React apps:
- 1 Module 1: JSX and component model — functional components, props, rendering
- 2 Module 2: State and events — useState, synthetic events, controlled inputs
- 3 Module 3: Core hooks — useEffect, useRef, useCallback, useMemo
- 4 Module 4: Component composition — lifting state, context API, custom hooks
- 5 Module 5: React Router — declarative routing, nested routes, navigation guards
- 6 Module 6: API integration — fetch, axios, async patterns, loading & error states
- 7 Module 7: Forms and validation — controlled forms, libraries, best practices
- 8 Module 8: Production build and deployment — Vite, environment variables, Vercel/Netlify
Prerequisites
JavaScript fundamentals (Introduction to JavaScript recommended).
Solid JavaScript fundamentals required (functions, arrays, promises, async/await). Introduction to JavaScript is the ideal prerequisite.
What you'll build
You leave with a portfolio React app you built solo — proper component architecture, real routing, real data fetching, deployed live with a public URL. The thing every junior frontend interview asks for, ready to demo.
- JSX, components, props, composition
- Hooks: useState, useEffect, useReducer, useContext, custom hooks
- Routing with React Router
- Server state with React Query / fetch
- Performance: memo, useMemo, useCallback, when each pays off
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
- 16 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.