How to build · 12

Developer Reference

Glossary, Git commands, HTTP codes, CSS, React hooks, SQL, common errors and technology comparisons.

Read: 0 / 8UX/UI Glossary Git Command Reference HTTP Status Codes CSS Reference React Hooks Reference SQL Reference Common Errors Technology Comparisons

UX/UI Glossary

Reference✓
Website section names: hero, header, CTA and other terms
A typical sales page is built from recurring sections: the header, the hero, social proof, features, steps, pricing, FAQ, a final call to action (CTA) and the footer. On top of them sit interface elements — modals, toasts, tabs, accordions. Knowing these names lets you talk about your site in the same language as your team and explain exactly what you want changed.
Beginner · 7 min read

Git Command Reference

Reference✓
Git command reference
Below are the most common Git commands grouped by task: setup, commits, history, branches, merging and rebasing, remotes, undoing changes, stash, tags and search. Each one was run in a real repository on Git 2.55 and 2.54. Dangerous commands (reset --hard, clean -f, forced push) are flagged, next to a safe alternative and a way to recover lost work with git reflog.
Beginner · 10 min read

HTTP Status Codes

Reference✓
HTTP status codes: a reference
A status code is a three-digit number whose first digit sets the class: 1xx interim response, 2xx success, 3xx redirection, 4xx client error, 5xx server error. Per RFC 9110 a client must understand at least the class and treat an unknown code as the x00 of that class. APIs mostly need 200, 201, 204, 304, 400, 401, 403, 404, 409, 422, 429, 500 and 503.
Beginner · 8 min read

CSS Reference

Reference✓
CSS reference: selectors, units, Flexbox and Grid
This cheat sheet covers what you look up most often: selectors and specificity (ID-CLASS-TYPE), the rem, em, %, vw, dvh and ch units and clamp(), box-sizing and positioning, Flexbox and Grid, custom properties, media and container queries, and centering recipes. Every code snippet was checked in a browser, and support for newer features is given as Baseline status on the check date.
Beginner · 9 min read

React Hooks Reference

Reference✓
React hooks reference
A hook is a React function whose name starts with use; it connects state, context, refs, effects or actions to a component. Below are the built-in React 19.3 hooks by group: signature, when you need it and a common mistake, plus a short TypeScript example for each key hook. Every example passed tsc, Vitest and a run in the browser.
Intermediate · 7 min read

SQL Reference

Reference✓
SQL reference: queries, data changes, DDL and transactions
A reference of the core SQL constructs with examples run on PostgreSQL 17 against a training shop database: SELECT, WHERE, JOIN, GROUP BY, window functions, CTEs, INSERT … ON CONFLICT, UPDATE and DELETE with joins, DDL, indexes, transactions and functions. A query is not executed in the order it is written: FROM → WHERE → GROUP BY → HAVING → SELECT → ORDER BY → LIMIT, which is why an alias from SELECT is not visible in WHERE. Where MySQL 8.4 behaves differently, a verified equivalent is given.
Beginner · 11 min read

Common Errors

Troubleshooting✓
Common JavaScript, React and Next.js errors and how to fix them
A reference of 33 common frontend and Node.js errors: for each one, the exact message text obtained by reproducing it on Node.js 24, React 19.3, Vite 8 and Next.js 16.4, the cause, the fix and how to prevent it. Search by the first line of the error: the type (TypeError, SyntaxError) and the text after the colon point to the section. Most React and TypeScript errors are caught by the linter and tsc before the code even runs.
Beginner · 14 min read

Technology Comparisons

Comparison✓
Technology comparison: what to choose for a website, an app and a backend
Rankings do not narrow a stack choice — four questions do: what the product does, who will maintain it, where it will run and what the team already has. A content site often needs only static generation without a framework, a web app — React with Next.js or Vue, and the backend is written in Node.js, Java with Spring Boot or Python depending on the team and the task; the default database is PostgreSQL, the default API style is REST and the default architecture is a modular monolith. Below are summary “when to use what” tables with links to the detailed breakdowns.
Intermediate · 13 min read

Tell us about your task — we'll review your request and get back to you

Got a project?
We'll scope and estimate it — for free.

Tell us about the product or the problem. After reviewing the task we'll come back with an architecture, a timeline and a price for the first version.

Scope and risks estimated before we start
NDA — yours or ours
Work starts within a week

Message on WhatsApp