cy.viewport() for screen sizes in Cypress - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to set the viewport to a mobile screen size.

Cypress

cy.[1]('iphone-6')

Drag options to blanks, or click blank then click option'

Aviewport

Bvisit

Cclick

Dget

Attempts:

3 left

💡 Hint

Common Mistakes

Using cy.visit() instead of cy.viewport().

Trying to set viewport size with cy.get().

The cy.viewport() command sets the screen size for testing different devices.

2fill in blank

medium

Complete the code to set the viewport to a custom width and height.

Cypress

cy.viewport({ width: [1], height: 800 })

Drag options to blanks, or click blank then click option'

Awidth

B'1024px'

C1024

Dheight

Attempts:

3 left

💡 Hint

Common Mistakes

Putting width value in quotes, which causes errors.

Using property names instead of values.

The width value must be a number without quotes to set the viewport size correctly.

3fill in blank

hard

Fix the error in the code to set the viewport to tablet size.

Cypress

cy.viewport({ width: 768, [1]: 1024 })

Drag options to blanks, or click blank then click option'

Awidth

Bheight

Csize

Dscreen

Attempts:

3 left

💡 Hint

Common Mistakes

Using width twice instead of height.

Using invalid property names like size or screen.

The correct property for height is height, not width or others.

4fill in blank

hard

Fill both blanks to set the viewport to a landscape iPad size.

Cypress

cy.viewport({ width: [1], height: [2] })

Drag options to blanks, or click blank then click option'

A1024

B768

C800

D600

Attempts:

3 left

💡 Hint

Common Mistakes

Swapping width and height values.

Using incorrect pixel values.

Landscape iPad size is width 1024 and height 768 pixels.

5fill in blank

hard

Fill all three blanks to set the viewport to a custom size and test a page.

Cypress

cy.viewport({ width: [1], height: [2] })
cy.[3]('https://example.com')

Drag options to blanks, or click blank then click option'

A1280

B720

Cvisit

Dclick

Attempts:

3 left

💡 Hint

Common Mistakes

Using click instead of visit to open the page.

Putting width or height in quotes.

Swapping width and height values.

Set viewport width to 1280, height to 720, then visit the page with cy.visit().

Practice

1. What is the main purpose of using cy.viewport() in Cypress tests?

easy

A. To change the screen size and test responsive layouts

B. To select elements on the page

C. To wait for an element to appear

D. To take screenshots of the page

Solution

1. Step 1: Understand the function of cy.viewport()

   This command sets the browser's screen size to simulate different devices or resolutions.

2. Step 2: Identify the purpose in testing

   Changing screen size helps test how the website looks and behaves on various devices, ensuring responsive design works.

3. Final Answer:

   To change the screen size and test responsive layouts -> Option A

4. Quick Check:

   cy.viewport() changes screen size = D [OK]

Hint: Remember: viewport changes screen size for responsive tests [OK]

Common Mistakes:

• Confusing viewport with element selectors
• Thinking viewport waits for elements
• Assuming viewport takes screenshots

2. Which of the following is the correct syntax to set the viewport size to 1024 pixels wide and 768 pixels tall in Cypress?

easy

A. cy.viewport({width: 1024, height: 768});

B. cy.viewport(1024, 768);

C. cy.viewport('1024x768');

D. cy.setViewport(1024, 768);

Solution

1. Step 1: Recall the correct cy.viewport() syntax

   The command accepts width and height as two separate number arguments: cy.viewport(width, height).

2. Step 2: Check each option

   cy.viewport(1024, 768); uses two numbers correctly. cy.viewport('1024x768'); uses a string which is invalid. cy.viewport({width: 1024, height: 768}); uses an object which is not supported. cy.setViewport(1024, 768); uses a wrong command name.

3. Final Answer:

   cy.viewport(1024, 768); -> Option B

4. Quick Check:

   cy.viewport(width, height) = C [OK]

Hint: Use two numbers, not strings or objects, in cy.viewport() [OK]

Common Mistakes:

• Passing size as a string like '1024x768'
• Using an object instead of two numbers
• Typing wrong command name like cy.setViewport

3. What will be the viewport size after running this Cypress code?

cy.viewport('iphone-6');
cy.viewport(800, 600);

medium

A. 800 pixels wide and 600 pixels tall

B. iPhone 6 preset size

C. Default viewport size

D. Test will fail due to conflicting viewport commands

Solution

1. Step 1: Understand command order in Cypress

   Commands run in order. The last cy.viewport() call sets the final size.

2. Step 2: Analyze the code

   First sets viewport to iPhone 6 size, then immediately changes it to 800x600 pixels.

3. Final Answer:

   800 pixels wide and 600 pixels tall -> Option A

4. Quick Check:

   Last cy.viewport() sets size = B [OK]

Hint: Last cy.viewport() call overrides previous sizes [OK]

Common Mistakes:

• Thinking first viewport call persists
• Assuming test fails on multiple viewport calls
• Confusing preset names with pixel sizes

4. You wrote this code but the viewport size does not change as expected:

cy.viewport(1024);

What is the problem?

medium

A. Viewport size must be set before visiting the page

B. cy.viewport() does not accept numbers

C. Missing height argument in cy.viewport()

D. cy.viewport() only accepts device names

Solution

1. Step 1: Check the cy.viewport() parameters

   The command requires both width and height as numbers, e.g., cy.viewport(1024, 768).

2. Step 2: Identify the error

   Only width (1024) is provided, height is missing, so viewport size won't change correctly.

3. Final Answer:

   Missing height argument in cy.viewport() -> Option C

4. Quick Check:

   Both width and height needed = A [OK]

Hint: Always provide width and height numbers in cy.viewport() [OK]

Common Mistakes:

• Passing only one number instead of two
• Thinking cy.viewport accepts only device names
• Believing viewport must be set before visiting page

5. You want to test your website's mobile and desktop views in one test. Which code snippet correctly sets the viewport to iPhone X size, runs a test, then changes to desktop size 1280x720 and runs another test?

hard

A. cy.viewport('iphone-x');\ncy.viewport(1280, 720);\ncy.get('#menu').should('be.visible');

B. cy.viewport('iphone-x', 1280, 720);\ncy.get('#menu').should('be.visible');

C. cy.viewport(1280, 720);\ncy.viewport('iphone-x');\ncy.get('#menu').should('be.visible');

D. cy.viewport('iphone-x');\ncy.get('#menu').should('be.visible');\ncy.viewport(1280, 720);\ncy.get('#menu').should('be.visible');

Solution

1. Step 1: Understand sequential viewport changes

   You can call cy.viewport() multiple times to change screen size during a test.

2. Step 2: Check the code snippets

   cy.viewport('iphone-x');\ncy.get('#menu').should('be.visible');\ncy.viewport(1280, 720);\ncy.get('#menu').should('be.visible'); sets iPhone X viewport, runs a check, then sets desktop viewport and runs the check again. This tests both views properly. cy.viewport('iphone-x', 1280, 720);\ncy.get('#menu').should('be.visible'); uses invalid syntax with multiple arguments. cy.viewport(1280, 720);\ncy.viewport('iphone-x');\ncy.get('#menu').should('be.visible'); changes viewport twice before any check. cy.viewport('iphone-x');\ncy.viewport(1280, 720);\ncy.get('#menu').should('be.visible'); runs only one check after both viewport changes, missing the first test.

3. Final Answer:

   Set viewport, test, change viewport, test again -> Option D

4. Quick Check:

   Change viewport before each test step = A [OK]

Hint: Call cy.viewport() before each test step to change screen size [OK]

Common Mistakes:

• Passing multiple sizes in one cy.viewport() call
• Changing viewport without running tests between
• Running tests only after last viewport change