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A complete index of all pages on alexrel.com.

// In short

This page is a complete, searchable index of every public page on alexrel.com. It covers the main pages (Home, About, Cases), four service pages (Web Development, Telegram Bots, GEO & SEO, Consultations), two project case studies (TeleGo, LingvoHabit), all published blog articles, and the full code snippets library — grouped by programming language. Use the sidebar to jump to a section or the search box to find a specific page.

Main Pages 3

Home About Cases with concrete results

Services 4

Web Development Telegram Bots GEO & SEO Consultations

Projects 2

TeleGo LingvoHabit

Blog 15

Telegram Web Apps (TWA): How to Launch a Full SaaS Inside Telegram Generative Engine Optimization (GEO): The New SEO for AI Search Optimizing Your Website for AI Crawlers: Robots.txt & JSON-LD How Much Does SaaS MVP Development Cost in 2026: A Stage-by-Stage Estimate How to Build a B2B SaaS MVP in 30 Days Without Technical Debt The Trap of Cheap Development: When to Rewrite Your SaaS MVP SaaS Monetization: Implementing Stripe, Billing, and Subscriptions Without Pain SaaS Database Architecture: Single-Tenant vs. Multi-Tenant Patterns Codebase Audit Checklist: How to Assess Technical Debt Before Scaling AI-Powered Customer Support: Building a RAG Bot with Live Agent Handover Bot Builder vs Custom Development: How to Choose in 2026 How Much Does Telegram Bot Development Cost in 2026: A Real Price Breakdown What a Telegram Bot Specification Should Include: A Checklist with Examples Why Your CRM Needs a Custom Telegram Bot (HubSpot & AmoCRM Integration)EzSwitch — Quick Keyboard Layout Switcher for macOS

Snippets 132

CSS (8)

CSS Gradient Text CSS Grid auto-fit — Responsive Grid Without Media Queries Center anything with flexbox Custom CSS Scrollbar Fluid Typography with clamp()Multiline text-overflow with Ellipsis Skeleton Loading Animation (CSS)Truncate single-line text with an ellipsis

Docker (3)

Docker Compose for Node.js + PostgreSQL + Redis Docker multi-stage builds for Node.js Docker security — non-root user and read-only filesystem

Express.js (6)

Centralized error-handling middleware Enable CORS in Express JWT Auth Middleware (Express)JWT access and refresh token rotation in Express Rate limit requests Sanitize an uploaded filename

Git (4)

Git cherry-pick and bisect — target specific commits Git log — filtering and formatting commit history Git squash commits and interactive rebase Git stash — save and restore work in progress

GitHub Actions (4)

GitHub Actions — CI pipeline for PRs GitHub Actions — build and push Docker image to registry GitHub Actions — deploy Node.js app to VPS via SSH GitHub Actions — scheduled tasks with cron

Go (7)

Create a simple HTTP server Generate a UUID HTTP Request with Timeout via Context (Go)HTTP Server with Graceful Shutdown (Go)Make an HTTP GET request Read a file line by line Run tasks concurrently with goroutines

JavaScript (34)

A JSON.parse that never throws Answer Telegram Callback Query Auto-arrange Telegram inline keyboard buttons Capitalize the first letter of a string Check if a hex color is light or dark Check if an event target is an editable field Convert Date to/from "YYYY-MM-DD" without timezone shifts Cosine similarity between two vectors Debounce a function Decode JWT Payload Without Verification Deep Clone an Object Detect the visitor's timezone automatically Display a timezone with its GMT offset Format a date/time in any IANA timezone Format a number compactly (1.2K, 3M)Generate Slug from String Generate a UUID Get IP geolocation info (ipapi.co)Get User ID and Data from Telegram Update Get seconds until the next UTC day/month rollover Manage a deduplicated, sorted tag list Merge Tailwind classes safely (cn helper)Parse Telegram /start deep-link parameters Parse loose values into a real boolean Pick and omit object keys Pluralize words with Intl.PluralRules Remove duplicates from an array Smooth Scroll to Anchor Telegram User Link and Mention Throttle a function Truncate Text by Word Count Validate Email Address Validate a media URL sleep() / Async Delay

Next.js (5)

Create an API route handler Generate dynamic page metadata Next.js App Router middleware — authentication and redirects Read search params in a Server Component Redirect from a Server Component or Route Handler

Nginx (4)

Nginx WebSocket proxy for real-time apps Nginx load balancing between Node.js instances Nginx reverse proxy with SSL termination Nginx static file server with caching

Node.js (6)

Constant-time string comparison for secrets Create a basic HTTP server Hash and verify a password with bcrypt Read a file asynchronously Read environment variables with defaults Stripe webhook handler with idempotency

PHP (18)

Bcrypt Password Hashing (PHP)Escape text for Telegram MarkdownV2 Format bytes as a human-readable size Generate a colored initials avatar (HTML/CSS)Generate a secure random password Get IP geolocation info (ipapi.co)Get Telegram User ID via PHP Webhook Get a timezone's current GMT offset in PHP Get the real client IP behind a proxy/CDN Make a GET request with cURL Mask a token/API key for safe display Parse a BCP-47 language tag Redis Rate Limiter (PHP)Retry an operation with exponential backoff + jitter Sanitize a string to valid UTF-8 Send Telegram Message via Bot API (PHP)Validate an email address Verify Telegram Webhook Secret

Prisma (4)

Prisma CRUD — create, read, update, delete Prisma migrations — create, apply, and roll back Prisma pagination — cursor and offset Prisma schema — User, Post, and relations

Python (5)

Check if a file or directory exists Flatten a nested list Read a CSV file into a list of dictionaries Retry Decorator with Backoff (Python)asyncio.gather with Concurrency Limit

React.js (6)

React context + useReducer for global state React useMediaQuery — responsive hook useDebounce hook useFetch hook useOnClickOutside hook usePersistedState hook

Tailwind CSS (4)

Tailwind CSS animations — keyframes and transition Tailwind CSS custom theme with CSS variables Tailwind CSS dark mode with class strategy Tailwind CSS responsive card grid

TypeScript (5)

Chunk Array into Groups Group Array by Key Pagination Utilities (Offset / Limit)Zod API validation schemas useFetch with AbortController — TypeScript

Vue (9)

useBreakpoints hook useClipboardCopy hook useDebouncedRef — Delayed Reactive Value useDragAndDrop hook useIntersectionObserver — Vue Composable useMediaQuery — Reactive Media Query usePlatform hook useTheme hook useViewMode hook