From the OpenReplay Blog
Fix 'sh: command not found: npm' on macOS and Linux
Fix the npm command not found error on macOS and Linux by diagnosing PATH issues, installing Node.js, and configuring nvm for reliable shell access.
How to Build a File Upload with Dropzone.js
Build a drag and drop file upload interface with Dropzone.js, including progress bars, file validation, and backend integration using pure JavaScript.
A Beginner's Guide to Sending Emails with Node.js
Set up Node.js email sending using Nodemailer, Gmail, and Mailtrap while applying security best practices for reliable backend email functionality.
Remote Procedure Calls in Web Development: A Simple Guide
Compare RPC, REST, and GraphQL to choose the right approach for web apps, and see how gRPC and JSON-RPC handle distributed systems communication.
Five Postman Alternatives for Everyday API Testing
Five lightweight Postman alternatives including Bruno, Hoppscotch, Thunder Client, Insomnia, and HTTPie help teams simplify API testing workflows.
Understanding @ts-ignore and When You Should Use It
Compare ts-ignore and ts-expect-error, recognize the risks of suppressing TypeScript errors, and know when each directive belongs in your codebase.
How Computed Properties and Watchers Work in Vue.js
Vue 3 computed properties and watchers serve distinct purposes. See how caching, reactivity, and side effects determine which tool fits your use case.
NPM vs NPX: Mastering Modern Package Execution in Node.js
Clarify the difference between npm and npx, two Node.js tools that handle dependency installation and on-demand package execution in distinct ways.
Creating Blurred Backgrounds Using CSS Backdrop-Filter
Build blurred backgrounds and glassmorphism effects with CSS backdrop-filter, covering browser support, GPU performance, and accessible fallback techniques.
Anatomy of a Supply-Chain Attack: A Short Breakdown
Supply chain attack methods targeting npm, SolarWinds, and CI/CD pipelines are broken down so readers can identify how attackers move and persist.
How Optimistic Updates Make Apps Feel Faster
Optimistic UI patterns using React Query and SWR help you build faster-feeling apps by updating state instantly and handling rollbacks gracefully.
How to Choose the Right Tailwind CSS Component Library
Compare styled and headless Tailwind CSS component libraries, evaluate Shadcn UI, DaisyUI, and Flowbite, and select the right fit for your project.
The Best Rich Text Editor Plugins for Vue
Compare TipTap, CKEditor 5, and TinyMCE to select the right Vue 3 rich text editor plugin based on licensing, bundle size, and TypeScript support.
Understanding package.json: The Heart of Every Node.js Project
Decode package.json fields, semantic versioning, and npm scripts to manage Node.js dependencies and automate project workflows with confidence.
Which Dotfiles Should You Commit to Git (and Which to Ignore)
Compare Git bare repositories and GNU Stow for dotfiles management and determine which shell, editor, and tool configurations belong in version control.
Fix Error: 'listen EADDRINUSE: address already in use' in Node.js
Fix the Node.js EADDRINUSE error fast. Identify occupied ports, terminate blocking processes, and implement graceful shutdown handlers to stop port conflicts.
5 Essential React Hooks for Frontend Development
Five essential React hooks including useTransition, useActionState, and useDeferredValue help you manage state, async forms, and UI performance effectively.
Unit vs Integration Testing in JavaScript: What to Use When
Compare unit and integration testing in JavaScript, and apply a practical decision framework using Jest, Testing Library, and MSW to build reliable test suites.
Debugging and Troubleshooting Common Electron Issues
Debug Electron crashes, memory leaks, and IPC issues using DevTools, VS Code, and heap snapshots to isolate renderer and main process problems effectively.
How Amazon Q in VS Code Helps You Write Better Code
Amazon Q Developer in VS Code delivers AI code suggestions, automated reviews, test generation, and multi-language support to boost your daily productivity.
10 Essential HTML Elements Every Developer Should Know
Ten essential HTML elements including dialog, details, meter, and time help developers reduce JavaScript dependencies and build accessible, semantic markup.
Getting Started with Expo: A Faster Way to Build React Native Apps
Build React Native apps faster using Expo, Expo Go, and EAS Build to handle setup, hot reload testing, and cloud-based production deployment.
How to Build and Use Plugins in Vite
Build custom Vite plugins using lifecycle hooks, virtual modules, and Rollup integration to transform files, inject logic, and extend your build process.
Vite: Fix "Failed to resolve import" (path aliases)
Fix Vite Failed to resolve import errors by syncing path aliases across vite.config.ts and tsconfig.json using manual setup or vite-tsconfig-paths plugin.