From the OpenReplay Blog
From Idea to App: 5 Next.js SaaS Starters
Compare five Next.js SaaS starters covering authentication, Stripe billing, and database setup to choose the right boilerplate for your next product.
Parsing Markdown Natively with Bun
Bun includes a native Markdown parser that converts Markdown to HTML, React elements, or custom output without extra packages or plugin configuration.
Importing JSON in ES Modules (No Fetch, No Bundler)
Import JSON in ES modules using native import attributes syntax, no fetch and no bundler required, across modern browsers and current Node.js releases.
A Beginner's Guide to Google's Antigravity IDE
Google Antigravity IDE uses autonomous agents to plan, write, and verify code across files. This breakdown covers Agent Manager, Artifacts, and Planning mode.
Getting Started with Game Development from Scratch
Compare Unity, Godot, Phaser, and Unreal Engine, then build a small complete game using the game loop, collision detection, and core object state concepts.
Safer ENV Vars for Web Apps With Varlock
Varlock brings schema-driven ENV validation to JavaScript apps, catching missing secrets early and preventing leaks in Astro, Vite, and Next.js builds.
npm Security Best Practices
Reduce npm supply chain risk by disabling post-install scripts, locking dependencies, enabling WebAuthn 2FA, and publishing via OIDC trusted publishing.
Testing Your Site Without JavaScript: What and Why
Test your site without JavaScript using Chrome DevTools to expose fragile HTML foundations and apply progressive enhancement with Next.js, Remix, or Astro.
Free AI Learning Resources for Developers
Build real AI applications using free resources from Google, OpenAI, Hugging Face, and Anthropic covering APIs, agents, and generative AI development.
Meet Rspress: A Rust-Powered Site Generator
Rspress uses Rspack to build React and MDX documentation sites with fast builds, customizable themes, and static Markdown output for AI tools.
How to Parse Numbers in JavaScript
Compare parseInt, parseFloat, Number, and BigInt to convert strings to numbers in JavaScript and avoid the edge cases that cause silent bugs.
Working with Files Using the FileReader API
The FileReader API reads user-selected files asynchronously using events, encoding options, and data URLs, while modern Blob methods offer simpler alternatives.
A Look at AdonisJS for Node Development
Compare AdonisJS and Express for Node.js development, and see how Lucid ORM, VineJS validation, and end-to-end TypeScript support change backend workflows.
Best SVG Icon Libraries for Modern Web Apps
Compare the top SVG icon libraries including Lucide, Heroicons, Phosphor, and Tabler to choose the right fit for your modern web app project.
What Is Chrome DevTools MCP?
Chrome DevTools MCP gives AI agents live browser access to inspect console errors, network requests, and DOM state during active development sessions.
VS Code Planning Mode: Think Before You Code
VS Code Planning Mode separates GitHub Copilot analysis from code execution, helping developers review structured implementation plans before any files change.
Inside the AST: How Tools Understand Code
Abstract Syntax Trees power ESLint, Prettier, and Babel. See how parsers build traversable nodes that drive linting, formatting, and code transformation.
Getting Started with Valibot
Start validating runtime data in TypeScript with Valibot. Define schemas, infer types, and build composable pipelines while keeping your bundle minimal.
When Might You Need BigInt in JavaScript?
JavaScript BigInt solves silent precision loss for integers beyond the safe Number range, including large IDs and WebAssembly 64-bit values.
Setting Up a TypeScript App with Bun
Set up a TypeScript project with Bun, skip the build step, and run TypeScript files directly using a clean runtime and package manager workflow.
Turning Git Repos into LLM-Ready Text: A Quick Guide
Convert any Git repository into structured LLM-ready text using Gitingest, Repomix, or repo2txt, and feed filtered codebases into AI models without token waste.
Adding Animations with Tailwind CSS Plugins
Map your options for adding Tailwind CSS animations, from built-in utilities to plugins and v4 custom keyframes, with accessibility in mind.
Using the Battery Status API in Web Apps
The Battery Status API exposes battery level and charging state to JavaScript. Build adaptive web apps while navigating browser support and privacy constraints.
Safe User Input Handling in Node.js
Safe Node.js input handling with Zod, parameterized queries, and explicit arguments blocks SQL injection, prototype pollution, and mass assignment attacks.