Shadow utilities in Bootsrap - Cheat Sheet & Quick Revision

Recall & Review

beginner

What are shadow utilities in Bootstrap?

Shadow utilities in Bootstrap are predefined classes that add shadow effects to elements, making them look raised or lifted from the page.

beginner

How do you add a small shadow to an element using Bootstrap?

Use the class shadow-sm on the element to add a small shadow.

beginner

What class would you use to remove shadow from an element in Bootstrap?

Use the class shadow-none to remove any shadow from an element.

beginner

List the four main shadow utility classes in Bootstrap.

The four main shadow utility classes are: shadow-none, shadow-sm, shadow, and shadow-lg.

intermediate

Why use shadow utilities instead of custom CSS for shadows?

Shadow utilities are quick to use, consistent across the site, and responsive. They save time and keep design uniform without writing custom CSS.

Which Bootstrap class adds a large shadow to an element?

A shadow-lg

B shadow-sm

C shadow-none

D shadow-xl

The class shadow-lg adds a large shadow. There is no shadow-xl class in Bootstrap.

What does the class shadow-none do?

A Adds a small shadow

B Removes any shadow

C Adds a large shadow

D Adds a medium shadow

shadow-none removes any shadow effect from the element.

Which class would you use for a default shadow in Bootstrap?

A shadow-lg

B shadow-sm

C shadow

D shadow-none

The class shadow adds the default shadow size.

Shadow utilities in Bootstrap are used to:

A Add shadow effects to elements

B Add borders

C Change font size

D Add color to text

Shadow utilities add shadow effects to elements to create depth.

Which shadow utility class would you use for the smallest shadow?

A shadow-lg

B shadow-none

C shadow

D shadow-sm

shadow-sm adds the smallest shadow size.

Explain how to use Bootstrap shadow utilities to add different shadow sizes to elements.

Think about the class names and what each does.

Describe why using Bootstrap shadow utilities is helpful compared to writing custom CSS shadows.

Consider benefits of ready-made classes.

Practice

1. What does the Bootstrap class shadow-lg do to an element?

easy

A. Changes the element's background color

B. Removes any shadow from the element

C. Adds a small shadow around the element

D. Adds a large shadow around the element to create depth

Solution

1. Step 1: Understand shadow utility classes

   Bootstrap provides shadow classes to add shadows of different sizes to elements.

2. Step 2: Identify the effect of shadow-lg

   The shadow-lg class adds a large shadow, making the element appear raised and deeper.

3. Final Answer:

   Adds a large shadow around the element to create depth -> Option D

4. Quick Check:

   shadow-lg means large shadow [OK]

Hint: Remember: lg means large shadow size [OK]

Common Mistakes:

• Confusing shadow-lg with shadow-none
• Thinking shadow-lg changes background color
• Mixing shadow-lg with shadow-sm

2. Which of the following is the correct way to remove a shadow from a Bootstrap element?

easy

A. Add class shadow-remove

B. Add class shadow-none

C. Add class no-shadow

D. Add class shadow-zero

Solution

1. Step 1: Recall Bootstrap shadow removal class

   Bootstrap uses shadow-none to remove shadows from elements.

2. Step 2: Check the options for the correct class

   Only shadow-none is a valid Bootstrap class to remove shadows.

3. Final Answer:

   Add class shadow-none -> Option B

4. Quick Check:

   shadow-none removes shadows [OK]

Hint: Use shadow-none to remove shadows, not shadow-remove [OK]

Common Mistakes:

• Using non-existent classes like shadow-remove
• Confusing shadow-none with shadow-zero
• Trying to remove shadow by removing other classes

3. What shadow effect will the following HTML produce?

<div class="shadow-sm p-3 mb-5 bg-white rounded">Small Shadow Box</div>

medium

A. A box with a large shadow around it

B. A box with no shadow

C. A box with a small shadow around it

D. A box with a medium shadow around it

Solution

1. Step 1: Identify the shadow class used

   The class shadow-sm is applied, which means a small shadow.

2. Step 2: Understand the visual effect

   The box will have a subtle, small shadow giving slight depth.

3. Final Answer:

   A box with a small shadow around it -> Option C

4. Quick Check:

   shadow-sm means small shadow [OK]

Hint: shadow-sm means small shadow, shadow-lg means large [OK]

Common Mistakes:

• Thinking shadow-sm means no shadow
• Confusing shadow-sm with shadow-lg
• Ignoring other classes like p-3 or rounded

4. You want to add a medium shadow to a button but accidentally use shadow-none. What will happen?

medium

A. The button will have no shadow

B. The button will have a large shadow

C. The button will have a medium shadow

D. The button will have a small shadow

Solution

1. Step 1: Understand the effect of shadow-none

   The class shadow-none removes any shadow from the element.

2. Step 2: Predict the button's shadow

   Even if you wanted a medium shadow, shadow-none overrides and removes it.

3. Final Answer:

   The button will have no shadow -> Option A

4. Quick Check:

   shadow-none removes shadows [OK]

Hint: shadow-none always removes shadows, no matter other classes [OK]

Common Mistakes:

• Assuming shadow-none adds a shadow
• Mixing shadow-none with shadow classes
• Not realizing class order matters

5. You want to create a card with a large shadow but no shadow on the header inside it. Which classes should you use?

<div class="?">
  <header class="?">Card Header</header>
  <main>Card content</main>
</div>

hard

A. div: shadow-lg, header: shadow-none

B. div: shadow-none, header: shadow-lg

C. div: shadow-sm, header: shadow-lg

D. div: shadow, header: shadow

Solution

1. Step 1: Apply large shadow to the card container

   Use shadow-lg on the div to add a large shadow around the card.

2. Step 2: Remove shadow from the header

   Use shadow-none on the header to ensure it has no shadow inside the card.

3. Final Answer:

   div: shadow-lg, header: shadow-none -> Option A

4. Quick Check:

   Large shadow on container, none on header [OK]

Hint: Use shadow-none on child to remove parent's shadow effect [OK]

Common Mistakes:

• Adding shadow to both div and header causing double shadows
• Using shadow-none on div removes all shadows
• Confusing shadow and shadow-lg classes