From the OpenReplay Blog
MCP vs REST vs GraphQL: how llm-first apis are different
Compare MCP, REST, and GraphQL to understand how LLM-first APIs differ in structure, stateful sessions, and dynamic tool access for AI systems.
What Is the Model Context Protocol (MCP)? A Practical Introduction for Developers
Model Context Protocol by Anthropic connects AI models to external tools like Postgres and GitHub using a standardized client-server architecture.
How to Build an MCP Server: Step-by-Step with Code Examples
Build a functional Python MCP server, define resources and tools, validate inputs with Pydantic, and connect to an MCP-compatible client like Claude Desktop.
What are React scripts? A developer’s guide
React scripts power every Create React App project. See what each command does, how Webpack and Babel fit in, and when to eject or switch tools.
What is the dependency inversion principle? Explained simply
The Dependency Inversion Principle explains how abstractions decouple high-level and low-level modules in TypeScript, Python, and Java code.
Understanding higher-order components in React with examples
React higher-order components wrap existing components to inject props and share logic. Compare HOCs with hooks, ref forwarding, and real code examples.
The complete guide to deleting remote branches in git: a developer's handbook
Delete remote Git branches with flag syntax, prune stale remote-tracking references, and resolve common errors to keep repositories organized.
Pure components in React: how they work and when to use them
Pure components and React.memo rely on shallow comparison to skip unnecessary re-renders. Know when to apply each pattern and how to avoid reference pitfalls.
GraphQL vs REST explained with code and use cases
Compare GraphQL and REST through real code examples, feature breakdowns, and use cases to select the right API design approach for any application.
Git shallow clone: what it is, when to use it, and how
Git shallow clones reduce download size and speed up CI/CD pipelines. Know when to use depth limits, how to unshallow, and avoid common history errors.
MUI Grid Explained with Real Examples: Layouts, Forms, and Dashboards
Build React layouts with MUI Grid using form, dashboard, and sidebar examples while mastering breakpoints, spacing, and container item structure.
Complete guide to infinite scrolling in React
Build infinite scroll in React with a package or a custom IntersectionObserver hook. Handle performance, loading states, and edge cases effectively.
Build and apply custom cursors using CSS and images
Build custom CSS cursors from images, define hotspot coordinates, and handle cross-browser fallbacks to create polished and accessible cursor experiences.
AI product manager vs product manager: what's the difference?
Compare AI product manager and traditional PM roles, covering machine learning, model bias, data workflows, and how to choose the right career path.
Hide Scrollbars Using CSS: Quick Examples and Best Practices
Hide CSS scrollbars across browsers, keep scroll functionality active, and apply accessibility best practices to maintain intuitive, user-friendly interfaces.
React Select in Practice: Real Examples, Customization, and Common Pitfalls
Build React Select components with async options, custom styling, and React Hook Form integration while avoiding re-renders and accessibility pitfalls.
AI Crawlers and How to Block Them with robots.txt
Block AI crawlers like GPTBot and ClaudeBot using robots.txt to protect your site content from LLM training pipelines and unauthorized data collection.
How to Set Up and Use Cursor for AI-Powered Code Generation
Set up Cursor AI with GPT-4 and Claude to automate code generation, debug errors, and manage complex codebases more efficiently as a developer.
Automating Frontend Testing with AI Tools
Automate frontend testing using Applitools Eyes, Testim, and mabl to catch visual bugs, reduce manual effort, and maintain tests as your UI evolves.
Fix Missing Files Between Local and Remote in Git: A Step-by-Step Guide
Fix missing files between local and remote in Git by updating gitignore rules, clearing cached files, and re-adding tracked paths correctly.
Understanding React Fiber: How It Improves Rendering Performance
React Fiber uses incremental rendering and task prioritization to keep React applications responsive and free from UI freezes caused by large updates.
How to Make GET Requests with Axios: A Beginner's Guide
Make GET requests with Axios using async/await, query parameters, custom headers, and error handling to fetch and parse API data cleanly in JavaScript.
How to Validate Data in TypeScript Using Zod (With Examples)
Validate TypeScript data at runtime using Zod schemas, from basic setup to advanced techniques like unions, nested objects, and API response validation.
How to Set Up a Node.js Project with TypeScript and Express
Set up a Node.js project with TypeScript and Express using step-by-step configuration of ESLint, Prettier, Jest, and Nodemon for scalable development.