From the OpenReplay Blog
How to Query the DOM in React Testing Library
Compare getBy, findBy, and queryBy methods in React Testing Library to write reliable component tests for synchronous, async, and conditional DOM elements.
Sending Background Data with the Beacon API
Send background data reliably using the Beacon API, navigator.sendBeacon(), and batching strategies to track analytics without blocking page navigation.
Tips for Better Keyboard Navigation in Web Apps
Fix tab order issues, implement modal focus trapping, and apply ARIA attributes alongside semantic HTML to build fully keyboard-accessible web applications.
ES2025 Highlights: JSON Modules, Iterator Helpers, and More
JSON modules, iterator helpers, enhanced Set methods, and RegExp.escape solve real JavaScript workflow problems using native browser and Node.js support.
Biome: The All-in-One Toolchain for Modern Frontend Projects
Compare Biome against ESLint and Prettier, and see how this Rust-based toolchain unifies linting, formatting, and import organization for frontend projects.
10 Practical ZSH Aliases to Speed Up Your Dev Workflow
Boost your dev workflow with 10 practical Zsh aliases covering Git, NPM, Docker Compose, and navigation to eliminate repetitive terminal commands daily.
Customizing Your Terminal with Oh My Zsh Themes and Plugins
Customize your terminal using Oh My Zsh themes like Powerlevel10k and productivity plugins including zsh-autosuggestions to boost your development workflow.
How to Install and Configure ZSH as Your Default Shell
Install ZSH as your default shell on macOS and Linux, configure Oh My ZSH plugins, and boost terminal productivity with syntax highlighting and tab completion.
Native Image Lazy Loading with Just HTML
Native HTML lazy loading via the loading attribute defers images without JavaScript. Apply it correctly to boost performance and prevent layout shifts.
Basic curl Commands Every Web Developer Should Know
Command-line API testing becomes faster with essential curl commands covering GET, POST, headers, authentication, timeouts, and debugging for web developers.
SolidJS vs React: Comparing Component Models and Performance
Compare SolidJS and React component models, reactivity systems, and rendering performance to make informed frontend framework decisions for your next project.
Practical Uses of NPM Scripts Beyond Just Build and Start
NPM scripts handle linting, testing, and releases beyond basic build commands. Tools like cross-env and rimraf keep workflows consistent across platforms.
Bring Your UI to Life with ScrollTrigger Animations in GSAP
Build scroll-driven animations using GSAP's ScrollTrigger plugin, including scrubbing, pinning, and parallax effects that respond naturally to user scrolling.
Zustand vs Jotai: Choosing the Right State Manager for Your React App
Compare Zustand and Jotai across performance, TypeScript support, and mental models to choose the right React state management library for your project.
Handling Form Input with Vanilla JavaScript: No Framework Required
Handle vanilla JavaScript forms by capturing submissions, validating with HTML5 constraints, and reading input values using the FormData API.
Getting Started with Nx for Monorepo Management
Set up an Nx monorepo workspace, manage React applications, share code libraries, and optimize build times using smart caching and affected commands.
.env Files and the Art of Not Committing Secrets
Protect API keys and database credentials by storing them in env files, loading them with dotenv in Node.js, and keeping secrets out of version control.
Rem vs Px: When and How to Use Each Unit in Modern CSS
Compare rem and px CSS units, understand accessibility tradeoffs, and apply the 62.5% technique to write scalable, user-friendly responsive layouts.
Optimizing API Calls in React: Debounce Strategies Explained
Debouncing React API calls with useCallback and custom hooks reduces wasted requests and prevents memory leaks from missing timeout cleanup.
VS Code Fork Wars: Cursor vs. Windsurf vs. Firebase Studio
Compare Cursor, Windsurf, and Firebase Studio to choose the right AI-powered VS Code fork for your development workflow and productivity needs.
OpenAI Codex vs. Claude Code: Which CLI AI tool is best for coding?
Compare OpenAI Codex CLI and Claude Code across benchmarks, architecture, and cost to choose the right AI terminal coding tool for your projects.
How to Get URL Parameters with JavaScript
Extract URL parameters in JavaScript using URLSearchParams or custom functions for legacy browsers, and handle encoded characters and missing values properly.
A Practical Guide to Styling Forms with Tailwind CSS
Style form inputs, labels, dropdowns, and buttons using Tailwind CSS utility classes. Build responsive forms with validation states and dark mode support.
Getting Started with UI Testing in Playwright
Start writing Playwright UI tests that run across browsers, using auto-waiting, visual comparisons, and built-in debugging tools like Trace Viewer.