Node.js prerequisite in Cypress - Cheat Sheet & Quick Revision

Recall & Review

beginner

What is Node.js and why is it important for Cypress?

Node.js is a JavaScript runtime that lets you run JavaScript outside the browser. Cypress needs Node.js to run tests because it uses Node.js to control browsers and manage test scripts.

beginner

How do you check if Node.js is installed on your computer?

Open your terminal or command prompt and type node -v. If Node.js is installed, it will show the version number like v20.0.0. If not, it will show an error.

beginner

What is the minimum Node.js version recommended for Cypress?

Cypress recommends using Node.js version 12 or higher. Using a modern version like Node.js 20 ensures compatibility and better performance.

beginner

Why should you install Node.js before installing Cypress?

Cypress depends on Node.js to run its commands and tests. Without Node.js, Cypress cannot start or manage test runs.

beginner

What command do you use to install Cypress after Node.js is set up?

Use npm install cypress --save-dev in your project folder. npm is the Node.js package manager that installs Cypress.

What does Node.js allow you to do?

A Run JavaScript outside the browser

B Create HTML pages

C Style web pages with CSS

D Run Python scripts

Node.js lets you run JavaScript code outside the browser environment.

Which command checks the installed Node.js version?

A node -v

B npm -v

C cypress -v

D node --install

The command node -v shows the installed Node.js version.

Why must Node.js be installed before Cypress?

A Node.js installs Cypress automatically

B Node.js styles the test reports

C Cypress uses Node.js to run tests

D Cypress is a Node.js alternative

Cypress depends on Node.js to execute test scripts and manage browsers.

What is the recommended minimum Node.js version for Cypress?

A 8

B 12

C 6

D 10

Cypress recommends Node.js version 12 or higher for compatibility.

Which tool installs Cypress after Node.js is set up?

A python

B git

C docker

D npm

npm is the Node.js package manager used to install Cypress.

Explain why Node.js is a prerequisite for running Cypress tests.

Think about what Cypress needs to run tests beyond the browser.

Describe how to verify Node.js installation and prepare your environment for Cypress.

Start with checking Node.js, then move to installing Cypress.

Practice

1. Why is it necessary to install Node.js before using Cypress?

easy

A. Because Node.js provides a graphical interface for Cypress

B. Because Node.js is used to write CSS styles for Cypress

C. Because Node.js is a database required by Cypress

D. Because Cypress runs on Node.js and needs it to execute tests

Solution

1. Step 1: Understand Cypress runtime environment

   Cypress is built on top of Node.js and requires Node.js to run its test scripts and commands.

2. Step 2: Identify the role of Node.js

   Node.js provides the JavaScript runtime environment that executes Cypress tests outside the browser.

3. Final Answer:

   Because Cypress runs on Node.js and needs it to execute tests -> Option D

4. Quick Check:

   Node.js is required runtime for Cypress [OK]

Hint: Remember Cypress needs Node.js runtime to work [OK]

Common Mistakes:

• Thinking Node.js is a database
• Confusing Node.js with UI tools
• Assuming Node.js is optional for Cypress

2. Which command correctly checks the installed Node.js version in the terminal?

easy

A. node version

B. node -v

C. npm version

D. node version -v

Solution

1. Step 1: Recall Node.js version command

   The standard command to check Node.js version is node -v, which outputs the version number.

2. Step 2: Verify other options

   node version is invalid syntax; npm version checks npm version, not Node.js; node version -v is invalid syntax.

3. Final Answer:

   node -v -> Option B

4. Quick Check:

   Use node -v to check Node.js version [OK]

Hint: Use short flag -v with node to check version [OK]

Common Mistakes:

• Using npm commands to check Node.js version
• Typing node version without flags
• Mixing up command order

3. What will be the output of running npm -v in the terminal after installing Node.js?

medium

A. The version number of npm installed with Node.js

B. An error saying npm command not found

C. The version number of Node.js

D. A list of installed npm packages

Solution

1. Step 1: Understand npm relationship with Node.js

   npm is the package manager that comes bundled with Node.js, so after installing Node.js, npm is also installed.

2. Step 2: Interpret the command output

   Running npm -v outputs the version number of npm, not Node.js or packages.

3. Final Answer:

   The version number of npm installed with Node.js -> Option A

4. Quick Check:

   npm -v shows npm version [OK]

Hint: npm -v shows npm version, not Node.js version [OK]

Common Mistakes:

• Expecting npm -v to show Node.js version
• Thinking npm -v lists packages
• Assuming npm is separate from Node.js

4. You run node -v but get an error: 'command not found'. What is the most likely cause?

medium

A. Node.js is not installed or not added to system PATH

B. You typed the command incorrectly; it should be node --version

C. npm is not installed

D. Your terminal does not support Node.js commands

Solution

1. Step 1: Analyze the error message

   'command not found' means the system cannot find the node executable in the PATH environment variable.

2. Step 2: Identify common causes

   This usually happens if Node.js is not installed or its installation folder is not added to the system PATH.

3. Final Answer:

   Node.js is not installed or not added to system PATH -> Option A

4. Quick Check:

   Missing Node.js or PATH causes 'command not found' [OK]

Hint: Check Node.js installation and PATH if command not found [OK]

Common Mistakes:

• Assuming npm missing causes node command error
• Thinking command syntax is wrong
• Believing terminal cannot run Node.js commands

5. You want to install the latest Node.js version to use Cypress. Which is the best approach?

hard

A. Use npm to install Node.js globally

B. Install Node.js using a random third-party website

C. Download and install Node.js from the official Node.js website

D. Install Cypress first, it will install Node.js automatically

Solution

1. Step 1: Identify official source for Node.js

   The official Node.js website provides the latest stable versions and safe installers for all platforms.

2. Step 2: Evaluate other options

   Third-party sites may be unsafe; npm cannot install Node.js itself; Cypress requires Node.js pre-installed.

3. Final Answer:

   Download and install Node.js from the official Node.js website -> Option C

4. Quick Check:

   Use official Node.js site for safe installation [OK]

Hint: Always use official Node.js website for installation [OK]

Common Mistakes:

• Trying to install Node.js via npm
• Trusting unofficial download sources
• Assuming Cypress installs Node.js automatically