Visibility utilities in Bootsrap - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to hide the element on all screen sizes.

Bootsrap

<div class="[1]">This text is hidden on all devices.</div>

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

Ad-none

Bd-block

Cd-inline

Dd-flex

Attempts:

3 left

💡 Hint

Common Mistakes

Using display classes that show the element instead of hiding it.

Confusing d-none with other display classes.

The d-none class hides the element on all screen sizes.

2fill in blank

medium

Complete the code to show the element only on medium and larger screens.

Bootsrap

<div class="d-none [1]">Visible on medium and larger screens.</div>

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

Ad-lg-block

Bd-xl-block

Cd-md-block

Dd-sm-block

Attempts:

3 left

💡 Hint

Common Mistakes

Using d-sm-block which shows from small screens, not medium.

Using classes for larger screens like d-lg-block which hides on medium.

The d-md-block class shows the element as block starting from medium screens and up.

3fill in blank

hard

Fix the error in the code to hide the element only on small screens.

Bootsrap

<div class="[1]">Hidden only on small screens.</div>

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

Ad-none-sm

Bd-sm-none

Cd-xs-none

Dd-block-sm

Attempts:

3 left

💡 Hint

Common Mistakes

Using invalid class names like d-none-sm.

Confusing breakpoint order or syntax.

The correct class to hide on small screens is d-sm-none. The class d-none-sm is invalid.

4fill in blank

hard

Fill both blanks to make the element visible only on large screens and hidden on smaller ones.

Bootsrap

<div class="[1] [2]">Visible only on large screens.</div>

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

Ad-none

Bd-lg-block

Cd-md-block

Dd-sm-none

Attempts:

3 left

💡 Hint

Common Mistakes

Using d-md-block which shows on medium screens too.

Not hiding the element by default.

Use d-none to hide by default, and d-lg-block to show on large screens.

5fill in blank

hard

Fill all three blanks to make the element hidden on extra small and small screens, visible as inline on medium, and hidden again on extra large screens.

Bootsrap

<div class="[1] [2] [3]">Complex visibility control.</div>

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

Ad-none

Bd-md-inline

Cd-xl-none

Dd-sm-block

Attempts:

3 left

💡 Hint

Common Mistakes

Using d-sm-block which shows on small screens, not hiding.

Mixing up the order of classes.

Use d-none to hide by default (extra small and small), d-md-inline to show inline on medium, and d-xl-none to hide again on extra large screens.

Practice

1. What does the Bootstrap class d-none do to an element?

easy

A. It changes the element to display as a block.

B. It makes the element invisible but keeps its space.

C. It hides the element completely, removing it from the layout.

D. It makes the element visible only on small screens.

Solution

1. Step 1: Understand the d-none class purpose

   The d-none class sets display: none; on the element, hiding it completely.

2. Step 2: Effect on layout

   Because the element is removed from the layout flow, it takes no space on the page.

3. Final Answer:

   It hides the element completely, removing it from the layout. -> Option C

4. Quick Check:

   d-none hides element fully [OK]

Hint: Remember: d-none means no display at all [OK]

Common Mistakes:

• Confusing d-none with invisible
• Thinking it only hides visually but keeps space
• Assuming it only works on small screens

2. Which of the following is the correct way to make an element visible only on medium and larger screens using Bootstrap classes?

easy

A. d-md-none d-lg-block

B. d-none d-md-block

C. d-block d-md-none

D. d-none d-sm-block

Solution

1. Step 1: Understand breakpoint classes

   d-none hides the element on all screen sizes. d-md-block makes it display block starting at medium screens and up.

2. Step 2: Combine classes for desired visibility

   Using d-none d-md-block hides the element on small and extra small screens, shows it on medium and larger.

3. Final Answer:

   <code>d-none d-md-block</code> -> Option B

4. Quick Check:

   Hide all, show from medium up = d-none d-md-block [OK]

Hint: Use d-none plus breakpoint d-*-block to show [OK]

Common Mistakes:

• Reversing the breakpoint classes order
• Using d-block d-md-none which hides on medium screens
• Confusing sm and md breakpoints

3. Given this HTML snippet:

<div class="invisible">Hello</div>

What will you see in the browser?

medium

A. The text 'Hello' is hidden but the space remains.

B. The text 'Hello' is visible and takes space.

C. The text 'Hello' is hidden and no space is taken.

D. The text 'Hello' is visible only on large screens.

Solution

1. Step 1: Understand the invisible class effect

   The invisible class applies visibility: hidden;, hiding the content but keeping its space.

2. Step 2: Visual result in browser

   The text won't be seen, but the element's space remains reserved on the page.

3. Final Answer:

   The text 'Hello' is hidden but the space remains. -> Option A

4. Quick Check:

   invisible hides content but keeps layout space [OK]

Hint: invisible hides text but keeps space [OK]

Common Mistakes:

• Thinking invisible removes element from layout
• Confusing invisible with d-none
• Expecting text to show on some screen sizes

4. You want to hide a button on small screens but show it on medium and larger screens. Which Bootstrap class combination is incorrect?

medium

A. d-none d-sm-block

B. d-sm-none d-md-block

C. d-block d-sm-none d-md-block

D. d-none d-md-block

Solution

1. Step 1: Analyze d-none d-sm-block

   d-none hides element on all sizes, d-sm-block shows it from small screens up, so it remains hidden on extra small but visible on small and larger.

2. Step 2: Check requirement

   The requirement is to hide on small screens but show on medium and larger. This combination shows on small screens, so it is incorrect.

3. Final Answer:

   <code>d-none d-sm-block</code> -> Option A

4. Quick Check:

   Hide on small, show medium up needs d-none d-md-block [OK]

Hint: Check breakpoint start points carefully for show/hide [OK]

Common Mistakes:

• Using d-sm-block instead of d-md-block
• Adding redundant classes that conflict
• Assuming d-none can be overridden by smaller breakpoint

5. You want a paragraph to be hidden on extra small and small screens but visible on medium and large screens. Which class combination achieves this?

hard

A. invisible d-md-visible

B. invisible d-md-block

C. invisible d-md-visible d-md-block

D. d-none d-md-block

Solution

1. Step 1: Understand the requirement

   Hide the paragraph on xs and sm screens, make it visible on md and larger.

2. Step 2: Analyze correct option

   d-none d-md-block sets display: none by default (hides completely on xs/sm), then display: block from md up (visible on md+).

3. Step 3: Why other options fail

   A and C use non-existent d-md-visible. D uses invisible which applies visibility: hidden everywhere, so remains hidden even on md+.

4. Final Answer:

   <code>d-none d-md-block</code> -> Option D

5. Quick Check:

   Hide xs/sm completely, show md+ = d-none d-md-block [OK]

Hint: Use d-none d-md-block to hide below medium, show from medium [OK]

Common Mistakes:

• Using invisible which keeps space but stays hidden on large screens
• Using non-existent classes like d-md-visible
• Not understanding breakpoint overrides for display