Full-Stack Deployment: Integrating Vite Frontend with Vercel and Node.js Backend

Day 49 of #100DayOfCode — Deployment II: Deploy Frontend

M Saad Ahmad finalized the deployment of a full-stack authentication system on Day 49 of his #100DayOfCode journey. The project integrates a React frontend with a Node.js backend using Vercel’s automated deployment pipeline.

Why This Matters

While local development often uses static URLs, production environments require dynamic configuration through environment variables to maintain security and flexibility. Misconfiguring the frontend-to-backend connection during deployment is a common failure point that prevents authentication systems from functioning in live environments, emphasizing the need for robust environment management.

Key Insights

• Vite environment variables must be prefixed with VITE_ to be exposed to the frontend, preventing accidental leakage of sensitive server-side keys.
• The import.meta.env feature in Vite provides module metadata used to inject environment-specific values during the ‘npm run build’ process.
• Vercel simplifies frontend deployment by automating build configurations directly from imported GitHub repositories.
• Manual configuration of environment variables in the Vercel dashboard is a mandatory step to prevent broken API calls in production.
• The transition from local development to a live system involves connecting React, TypeScript, Node.js, and MongoDB into a single accessible unit.

Working Examples

Configuration of the .env file to store the deployed backend URL.

VITE_API_URL=Backend_API

Accessing environment variables in Vite using import.meta.env.

const API_URL = import.meta.env.VITE_API_URL;

Practical Applications

• Use Case: Deploying a React-TypeScript authentication system where the frontend communicates with a remote Express.js API via Vercel-hosted endpoints.
• Pitfall: Forgetting to add VITE_ variables to the Vercel dashboard, which results in undefined API endpoints and failed registration or login flows.
• Use Case: Managing multiple environment stages by swapping VITE_API_URL values during the deployment build process.

References:

• https://dev.to/m_saad_ahmad/day-49-of-100dayofcode-deployment-ii-deploy-frontend-5c55