Node adapter deployment in Svelte - Cheat Sheet & Quick Revision

Recall & Review

beginner

What is the purpose of the Node adapter in SvelteKit?

The Node adapter prepares your SvelteKit app to run on a Node.js server by creating a build that works with Node's environment and APIs.

beginner

Which command builds a SvelteKit app using the Node adapter?

You run npm run build after configuring the Node adapter in svelte.config.js to create a Node-compatible build.

intermediate

How do you configure the Node adapter in a SvelteKit project?

In <code>svelte.config.js</code>, import <code>@sveltejs/adapter-node</code> and set it as the adapter in the <code>kit.adapter</code> property.

beginner

What file do you run to start your SvelteKit app after building with the Node adapter?

You run node build/index.js to start the server created by the Node adapter.

intermediate

Why is the Node adapter useful for deploying SvelteKit apps?

It lets you deploy your app on any server that supports Node.js, giving you control over the server environment and easy integration with Node tools.

What does the Node adapter do in SvelteKit?

A Prepares the app to run on a Node.js server

B Converts the app to a static site

C Deploys the app to a CDN automatically

D Runs the app only in the browser

The Node adapter builds the app to run on a Node.js server environment.

Which file do you modify to set the Node adapter in SvelteKit?

A index.js

B package.json

C app.html

D svelte.config.js

The Node adapter is configured in svelte.config.js under the kit.adapter property.

After building with the Node adapter, how do you start the app?

A npm start

B node build/index.js

C svelte-kit dev

D npm run build

You run node build/index.js to start the server created by the Node adapter.

Which package do you install to use the Node adapter?

A express

B @sveltejs/adapter-static

C @sveltejs/adapter-node

D svelte-node

The official Node adapter package is @sveltejs/adapter-node.

Why might you choose the Node adapter over the static adapter?

A To run server-side code and APIs

B To generate only static files

C To deploy on a CDN without a server

D To run the app only in the browser

The Node adapter supports server-side code and APIs by running on a Node.js server.

Explain how to set up and deploy a SvelteKit app using the Node adapter.

Think about the steps from installation to running the server.

Describe the benefits of using the Node adapter for deployment compared to static deployment.

Consider what dynamic features need a server.

Practice

1. What is the main purpose of using the @sveltejs/adapter-node in a Svelte project?

easy

A. To convert Svelte components into React components

B. To deploy the Svelte app on a Node.js server

C. To enable Svelte apps to run in the browser only

D. To add CSS styling automatically to the app

Solution

1. Step 1: Understand adapter purpose

   The @sveltejs/adapter-node is designed to prepare Svelte apps to run on Node.js servers.

2. Step 2: Compare options

   Options describing conversion to React, browser-only support, or automatic CSS styling are unrelated. Only deploying the Svelte app on a Node.js server correctly states the adapter's purpose.

3. Final Answer:

   To deploy the Svelte app on a Node.js server -> Option B

4. Quick Check:

   Node adapter = deploy on Node.js server [OK]

Hint: Node adapter = run Svelte app on Node.js server [OK]

Common Mistakes:

• Thinking adapter converts Svelte to React
• Assuming adapter only works in browsers
• Confusing adapter with styling tools

2. Which of the following is the correct way to configure the Node adapter in svelte.config.js?

easy

A. import adapter from '@sveltejs/adapter-node'; export default { kit: { adapter: adapter() } };

B. import adapter from '@sveltejs/adapter-node'; export default { kit: { adapter: adapter } };

C. import adapter from '@sveltejs/adapter-node'; export default { kit: { adapter() } };

D. import adapter from '@sveltejs/adapter-node'; export default { adapter: adapter() };

Solution

1. Step 1: Check correct adapter usage

   The Node adapter must be imported and called as a function inside the kit.adapter property.

2. Step 2: Validate syntax

   import adapter from '@sveltejs/adapter-node'; export default { kit: { adapter: adapter() } }; correctly uses adapter: adapter(). Incorrect configurations have invalid object syntax like { adapter() }, fail to call adapter as a function, or place it outside kit.

3. Final Answer:

   import adapter from '@sveltejs/adapter-node'; export default { kit: { adapter: adapter() } }; -> Option A

4. Quick Check:

   Call adapter() inside kit.adapter [OK]

Hint: Always call adapter() inside kit.adapter in svelte.config.js [OK]

Common Mistakes:

• Forgetting to call adapter as a function
• Placing adapter outside the kit object
• Using adapter without parentheses

3. Given the following commands run in a Svelte project configured with the Node adapter:

npm run build
node build/index.js

What will happen when you run node build/index.js?

medium

A. The build folder is deleted

B. An error occurs because index.js does not exist

C. The app runs in the browser automatically

D. The Svelte app starts a Node.js server serving the built app

Solution

1. Step 1: Understand build output

   Using the Node adapter, npm run build creates a Node.js server app in the build folder, including index.js.

2. Step 2: Running the server

   Running node build/index.js starts the Node.js server that serves the Svelte app.

3. Final Answer:

   The Svelte app starts a Node.js server serving the built app -> Option D

4. Quick Check:

   Build + node index.js = start server [OK]

Hint: Build creates server; node index.js starts it [OK]

Common Mistakes:

• Thinking index.js is missing after build
• Expecting app to open in browser automatically
• Confusing build folder with source code

4. You configured @sveltejs/adapter-node in svelte.config.js but running node build/index.js gives an error: Cannot find module 'devalue'. What is the likely cause?

medium

A. You forgot to install dependencies with npm install

B. You did not import the adapter correctly in svelte.config.js

C. You ran npm run dev instead of npm run build

D. The Node.js version is too old

Solution

1. Step 1: Understand the error

   The error means Node.js cannot find the devalue package, which the adapter-node server depends on.

2. Step 2: Check dependencies

   This usually happens if npm install was not run to install all required packages.

3. Final Answer:

   You forgot to install dependencies with npm install -> Option A

4. Quick Check:

   Missing module error = run npm install [OK]

Hint: Missing module? Run npm install before starting server [OK]

Common Mistakes:

• Assuming adapter import error causes missing module
• Confusing dev and build commands
• Ignoring dependency installation step

5. You want to deploy your Svelte app with the Node adapter but need to customize the server port to 4000. Which code snippet correctly sets the port when starting the server?

hard

A. In build/index.js, add const port = 4000; and pass it to the server start function

B. Modify the package.json scripts to include --port 4000

C. Set process.env.PORT = 4000 before running node build/index.js

D. Change the port in svelte.config.js inside the adapter options

Solution

1. Step 1: Understand Node adapter port config

   The Node adapter server reads the port from the environment variable PORT by default.

2. Step 2: Set environment variable before start

   Setting process.env.PORT = 4000 or running PORT=4000 node build/index.js sets the port correctly.

3. Final Answer:

   Set process.env.PORT = 4000 before running node build/index.js -> Option C

4. Quick Check:

   Port set via environment variable PORT [OK]

Hint: Set PORT env variable before starting server [OK]

Common Mistakes:

• Trying to set port in svelte.config.js (not supported)
• Modifying build/index.js directly (not recommended)
• Adding port flags in package.json scripts without env