Why Vercel deployment (default) in NextJS? - Purpose & Use Cases

The Big Idea

What if you could share your app with the world in just one command?

The Scenario

Imagine you finish building your Next.js app and want to share it with friends or users. You try uploading files manually to a server, setting up complicated configurations, and handling server restarts yourself.

The Problem

This manual deployment is slow, confusing, and easy to break. You might forget a step, misconfigure the server, or face downtime. It's like trying to set up a complicated machine without instructions.

The Solution

Vercel deployment automates all this. With one command or click, your Next.js app is built, optimized, and live on the internet. It handles servers, scaling, and updates smoothly, so you focus on coding.

Before vs After

✗ Before

scp -r ./my-app user@server:/var/www/html
ssh user@server 'pm2 restart my-app'

✓ After

vercel --prod

What It Enables

Instant, reliable, and scalable deployment of your Next.js app with zero hassle.

Real Life Example

A developer finishes a blog site and wants to share it immediately. Using Vercel, they deploy in seconds and get a live URL to send to friends without worrying about servers.

Key Takeaways

Manual deployment is complex and error-prone.

Vercel automates building and hosting Next.js apps.

Deployments become fast, reliable, and scalable.

Practice

1. What is the main purpose of deploying a Next.js app on Vercel using the default settings?

easy

A. To create a backup of your app files

B. To run the app only on your local machine

C. To convert the app into a mobile application

D. To make the app live on the internet with minimal setup

Solution

1. Step 1: Understand Vercel deployment purpose

   Vercel deployment is designed to host your Next.js app online so others can access it.

2. Step 2: Recognize default deployment behavior

   Using default settings, Vercel automatically builds and hosts your app live on the internet.

3. Final Answer:

   To make the app live on the internet with minimal setup -> Option D

4. Quick Check:

   Vercel deployment = live app hosting [OK]

Hint: Vercel default deploy means live app online quickly [OK]

Common Mistakes:

• Thinking deployment only runs locally
• Confusing deployment with app backup
• Assuming deployment converts app to mobile

2. Which command correctly deploys a Next.js app to Vercel using the CLI with default settings?

easy

A. vercel deploy --prod

B. vercel

C. vercel --prod

D. deploy vercel

Solution

1. Step 1: Recall Vercel CLI default deploy command

   The basic command to deploy is simply vercel, which starts the deployment process.

2. Step 2: Understand optional flags

   While --prod deploys to production, the default deploy command without flags is just vercel.

3. Final Answer:

   vercel -> Option B

4. Quick Check:

   Default deploy command = vercel [OK]

Hint: Use just 'vercel' to deploy with defaults [OK]

Common Mistakes:

• Adding unnecessary flags like --prod by default
• Using wrong command order like 'deploy vercel'
• Confusing 'vercel --prod' as default

3. After running vercel to deploy your Next.js app, what will you see in the terminal if the deployment is successful?

medium

A. A URL link where your app is live

B. An error message about missing files

C. A prompt to install Next.js

D. A message saying deployment is disabled

Solution

1. Step 1: Understand Vercel deployment output

   When deployment succeeds, Vercel shows a URL link to access your live app.

2. Step 2: Identify success vs error messages

   Error messages or prompts indicate failure or missing setup, not success.

3. Final Answer:

   A URL link where your app is live -> Option A

4. Quick Check:

   Successful deploy shows live app URL [OK]

Hint: Look for live URL in terminal after deploy [OK]

Common Mistakes:

• Expecting no output after deploy
• Confusing error messages as success
• Thinking deployment disables app

4. You ran vercel but your app fails to deploy with a build error. What is the most likely cause?

medium

A. Your internet connection is too fast

B. You forgot to install Vercel CLI globally

C. Missing package.json or build scripts in your project

D. You used the wrong terminal emulator

Solution

1. Step 1: Identify build error causes in Vercel

   Build errors usually happen if essential files like package.json or build scripts are missing.

2. Step 2: Rule out unrelated causes

   Not installing CLI prevents running commands, but here command ran. Internet speed or terminal choice doesn't cause build errors.

3. Final Answer:

   Missing package.json or build scripts in your project -> Option C

4. Quick Check:

   Build error = missing config files [OK]

Hint: Check package.json and build scripts if build fails [OK]

Common Mistakes:

• Blaming internet speed for build errors
• Assuming CLI install issues cause build errors
• Thinking terminal type affects build

5. You want to deploy a Next.js app on Vercel with default settings but exclude a folder named tests from the deployment. How can you achieve this?

hard

A. Add tests/ to a .vercelignore file in your project root

B. Rename the folder to _tests so Vercel ignores it automatically

C. Delete the tests folder before deploying

D. Use a CLI flag --ignore tests when running vercel

Solution

1. Step 1: Understand how to exclude files/folders in Vercel

   Vercel supports a .vercelignore file to specify files or folders to skip during deployment.

2. Step 2: Apply exclusion for the tests folder

   Adding tests/ line in .vercelignore tells Vercel to ignore that folder automatically.

3. Final Answer:

   Add tests/ to a .vercelignore file in your project root -> Option A

4. Quick Check:

   Use .vercelignore to exclude folders [OK]

Hint: Use .vercelignore file to exclude folders [OK]

Common Mistakes:

• Renaming folders expecting auto-ignore
• Deleting folders instead of ignoring
• Using non-existent CLI flags to ignore