From the OpenReplay Blog
Best Copilot Alternatives for 2026
Compare GitHub Copilot alternatives including Cursor, Windsurf, and Claude Code across agentic workflows, multi-file edits, and frontend team use cases.
How Middleware Works in Node.js
Trace how Express middleware executes in order, how next controls the chain, and how Express 5 handles async errors in the request lifecycle.
The Linux Cron Cheatsheet
Schedule Linux cron jobs with confidence using correct five-field syntax, distro-aware environment tips, and a full comparison of cron versus systemd timers.
A Tour of Handy Linux Tools for Modern Devs
Modern Linux CLI tools like ripgrep, fzf, delta, and lazygit solve real frontend developer problems with faster performance and clearer output.
A Quick Guide to Hugging Face for Developers
Add AI capabilities to web applications using Hugging Face Hub, Transformers, Inference Providers, and Inference Endpoints without training models from scratch.
WebGPU vs WebGL: Why the Industry Is Moving On
Compare WebGPU and WebGL across pipelines, bind groups, compute shaders, and WGSL to decide when migrating your rendering workflow makes sense.
How to Stop a Page From Scrolling While a Dialog Is Open
Stop background scrolling when a modal dialog is open using overflow hidden, overscroll behavior, and reliable iOS Safari scroll lock techniques.
The State of JavaScript IDEs in 2026
Compare VS Code, WebStorm, Cursor, and Zed on AI integration, security posture, and agent workflows to choose the right JavaScript IDE for your team.
What to Do When Your API Keys End Up in a Repo
Know exactly how to revoke exposed API keys, clean Git history, and prevent secrets from reaching GitHub repos using push protection and secret scanning.
TypeScript in Node: The Practical Setup
Set up TypeScript in Node.js using ESM, tsc compilation, and native type-stripping to build production APIs and scripts with modern tooling.
How to Build a Minimal REST API in Node.js
Build a minimal REST API in Node.js using Express 5 with JSON parsing, proper status codes, and centralized error handling in about 80 lines of code.
A Quick Guide to Loading Indicators in Web Apps
Build better loading UX by choosing spinners, skeletons, or optimistic UI and implementing React Suspense boundaries with Next.js App Router loading states.
A Beginner's Guide to SQL Injection (And How to Prevent It)
SQL injection attacks exploit unsafe database queries. See how parameterized queries and least-privilege database accounts keep your application secure.
Immutable State the Easy Way: Understanding Immer
Immer applies JavaScript proxies to handle immutable state updates. See how Redux Toolkit uses Immer and avoid common draft mutation pitfalls.
DNS Basics Every Developer Should Know
DNS resolution, record types, TTL behavior, DNSSEC, DoH, and HTTPS records explained so developers can debug production failures with confidence.
Release Workflows Made Easy With Changesets
Build reliable npm release workflows using Changesets, GitHub Actions, and OIDC trusted publishing to automate monorepo versioning and changelog generation.
How Passwordless Login Works Under the Hood
How passkeys use public-key cryptography, WebAuthn flows, and FIDO2 origin binding to deliver phishing-resistant passwordless authentication on the web.
Beneath Frameworks: Trust the Web's Primitives
Evaluate the Popover API, View Transitions, Navigation API, and CSS primitives as framework alternatives using Baseline to guide safe adoption.
A Beginner's Guide to Remote Functions in SvelteKit
SvelteKit remote functions replace manual API endpoints with type-safe server calls. Compare query, form, command, and prerender types to choose correctly.
Refs Explained: How Frameworks Handle DOM Direct Access
DOM refs in React, Vue, Angular, and Svelte give you direct DOM access without breaking framework guarantees when declarative patterns fall short.
Why Devs Are Moving to TanStack Start from Next.js
Compare TanStack Start and Next.js across routing, server functions, and Vite integration to decide which React framework fits your team best.
How to Spot Database Queries That Hurt Your App's Performance
Trace slow database queries using query plans, slow query logs, and OpenTelemetry spans to identify N+1 problems, lock contention, and missing indexes.
Building a Custom File Upload Component for React
Build a custom React file upload component with drag and drop, validation, previews, and XHR progress tracking while keeping file inputs uncontrolled.
Tables Not Divs: A Simple API for Real Tabular Data
Build real data tables using the HTML table DOM API with native methods that avoid XSS risks and produce semantic, accessible markup by default.