Works on Localhost But Fails After Deployment? Here's Why!

Your React, Angular, or Node.js application works perfectly on localhost. But the moment you deploy it, your APIs stop working. Why? In this practical live session, I explain three common reasons why applications work locally but fail in production — and how to debug them without wasting hours changing code. *In this video, you'll learn:* Why localhost API URLs fail after deployment How to configure production API endpoints What causes CORS errors and how to investigate them Why missing environment variables break applications How database connection issues affect deployed applications How to debug using Chrome DevTools and backend logs We use a real-world React + Node.js order-management application example to understand these deployment issues. Whether you're an Angular developer, React developer, or frontend engineer moving toward full-stack development, these are practical skills worth understanding. *Frontend to Full Stack Build Cohort* I'm planning hands-on group sessions where we'll build and deploy real full-stack applications together. Personalized 1:1 mentorship will also be available. Interested? Comment *BUILD* below or connect with me on LinkedIn. Website: https://sandipjaiswar.com Subscribe for practical discussions on JavaScript, Angular, React, Node.js, backend development, deployment, system design, and software engineering. #FrontendDevelopment #FullStackDevelopment #ReactJS #Angular #NodeJS