Accordion component in Bootsrap - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to create a Bootstrap accordion container.

Bootsrap

<div class="accordion" id="[1]">
  <!-- Accordion items go here -->
</div>

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

AaccordionContainer

BaccordionMain

CaccordionExample

DaccordionGroup

Attempts:

3 left

💡 Hint

Common Mistakes

Forgetting to add an id attribute to the accordion container.

Using an id that doesn't match the data-bs-parent attribute in items.

The Bootstrap accordion requires an id attribute on the container to link items. "accordionExample" is the common example id.

2fill in blank

medium

Complete the code to create an accordion item header button that toggles the collapse.

Bootsrap

<h2 class="accordion-header" id="headingOne">
  <button class="accordion-button" type="button" data-bs-toggle="[1]" data-bs-target="#collapseOne" aria-expanded="true" aria-controls="collapseOne">
    Accordion Item #1
  </button>
</h2>

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

Acollapse

Bmodal

Cdropdown

Dtab

Attempts:

3 left

💡 Hint

Common Mistakes

Using data-bs-toggle="modal" or other incorrect values.

Leaving data-bs-toggle attribute empty.

The button toggles the collapse behavior, so data-bs-toggle must be "collapse".

3fill in blank

hard

Fix the error in the collapse div to correctly link it to the header button.

Bootsrap

<div id="collapseOne" class="accordion-collapse collapse [1]" aria-labelledby="headingOne" data-bs-parent="#accordionExample">
  <div class="accordion-body">
    Content for accordion item #1.
  </div>
</div>

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

Ashow

Bactive

Copen

Dvisible

Attempts:

3 left

💡 Hint

Common Mistakes

Using classes like "active" or "open" which don't control collapse visibility.

Forgetting to add any class to show the content by default.

To have the first accordion item open by default, the collapse div needs the class "show".

4fill in blank

hard

Fill both blanks to create a second accordion item with correct header and collapse ids.

Bootsrap

<h2 class="accordion-header" id="[1]">
  <button class="accordion-button collapsed" type="button" data-bs-toggle="collapse" data-bs-target="#collapseTwo" aria-expanded="false" aria-controls="collapseTwo">
    Accordion Item #2
  </button>
</h2>
<div id="collapseTwo" class="accordion-collapse collapse" aria-labelledby="[2]" data-bs-parent="#accordionExample">
  <div class="accordion-body">
    Content for accordion item #2.
  </div>
</div>

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

AheadingTwo

BheadingOne

CcollapseOne

DcollapseTwo

Attempts:

3 left

💡 Hint

Common Mistakes

Using the first item's ids for the second item.

Mismatching header id and aria-labelledby values.

The header id and aria-labelledby must match for the second item, both should be "headingTwo".

5fill in blank

hard

Fill all three blanks to create a third accordion item with correct ids and button state.

Bootsrap

<h2 class="accordion-header" id="[1]">
  <button class="accordion-button collapsed" type="button" data-bs-toggle="collapse" data-bs-target="#collapseThree" aria-expanded="false" aria-controls="collapseThree">
    Accordion Item #3
  </button>
</h2>
<div id="[3]" class="accordion-collapse collapse" aria-labelledby="[2]" data-bs-parent="#accordionExample">
  <div class="accordion-body">
    Content for accordion item #3.
  </div>
</div>

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

AheadingThree

BheadingTwo

CcollapseThree

DcollapseTwo

Attempts:

3 left

💡 Hint

Common Mistakes

Reusing ids from previous accordion items.

Mismatching aria-labelledby and header ids.

The third item's header id and aria-labelledby must be "headingThree" and the collapse div id must be "collapseThree".

Practice

1. What is the main purpose of the Accordion component in Bootstrap?

easy

A. To create a navigation bar with dropdown menus

B. To show and hide sections of content by expanding or collapsing them

C. To display images in a sliding carousel

D. To style buttons with different colors

Solution

1. Step 1: Understand Accordion functionality

   The Accordion component is designed to toggle visibility of content sections by expanding or collapsing them.

2. Step 2: Compare with other Bootstrap components

   Navigation bars, carousels, and buttons serve different purposes unrelated to content toggling.

3. Final Answer:

   To show and hide sections of content by expanding or collapsing them -> Option B

4. Quick Check:

   Accordion = toggle content visibility [OK]

Hint: Accordion toggles content sections open or closed [OK]

Common Mistakes:

• Confusing Accordion with navigation menus
• Thinking Accordion is for image sliders
• Assuming Accordion styles buttons

2. Which of the following is the correct HTML structure to start an Accordion in Bootstrap 5?

easy

A. <div class='accordion' id='myAccordion'>

B. <accordion id='myAccordion'>

C. <div class='accordion-item'>

D. <section class='accordion-collapse'>

Solution

1. Step 1: Identify the container element for Accordion

   The Accordion container uses a div with class accordion and an ID for reference.

2. Step 2: Check Bootstrap 5 syntax

   Bootstrap 5 requires div.accordion as the wrapper, not accordion tag or other classes like accordion-item or accordion-collapse alone.

3. Final Answer:

   <div class='accordion' id='myAccordion'> -> Option A

4. Quick Check:

   Accordion container = div.accordion [OK]

Hint: Accordion always starts with div.accordion container [OK]

Common Mistakes:

• Using a non-existent <accordion> tag
• Starting with accordion-item instead of accordion container
• Confusing collapse section with container

3. Given this Accordion item code snippet, what will happen when the button is clicked?

<div class='accordion-item'>
  <h2 class='accordion-header' id='headingOne'>
    <button class='accordion-button' type='button' data-bs-toggle='collapse' data-bs-target='#collapseOne' aria-expanded='true' aria-controls='collapseOne'>
      Section 1
    </button>
  </h2>
  <div id='collapseOne' class='accordion-collapse collapse show' aria-labelledby='headingOne' data-bs-parent='#myAccordion'>
    <div class='accordion-body'>Content 1</div>
  </div>
</div>

medium

A. The entire accordion will reload the page

B. Nothing will happen because the button lacks a click event

C. The content inside 'Content 1' will collapse or expand when the button is clicked

D. The button will change color but content stays visible

Solution

1. Step 1: Analyze button attributes for toggle

   The button has data-bs-toggle='collapse' and data-bs-target='#collapseOne', linking it to the collapsible content.

2. Step 2: Check the collapsible content state

   The content div has class collapse show, meaning it is visible initially and will toggle on button click.

3. Final Answer:

   The content inside 'Content 1' will collapse or expand when the button is clicked -> Option C

4. Quick Check:

   Button toggles collapse content visibility [OK]

Hint: data-bs-toggle='collapse' toggles content visibility [OK]

Common Mistakes:

• Assuming button does nothing without explicit JS
• Thinking button reloads page
• Confusing color change with content toggle

4. What is wrong with this Accordion code snippet that prevents it from working properly?

<div class='accordion' id='accordionExample'>
  <div class='accordion-item'>
    <h2 class='accordion-header' id='headingOne'>
      <button class='accordion-button' type='button' data-bs-toggle='collapse' data-bs-target='#collapseOne' aria-expanded='false' aria-controls='collapseOne'>
        Accordion Item #1
      </button>
    </h2>
    <div id='collapseOne' class='accordion-collapse' aria-labelledby='headingOne' data-bs-parent='#accordionExample'>
      <div class='accordion-body'>Content for item 1</div>
    </div>
  </div>
</div>

medium

A. The accordion-collapse div is missing the collapse class

B. The button should not have aria-expanded attribute

C. The data-bs-parent attribute should be on the button, not the collapse div

D. The accordion container is missing an ID

Solution

1. Step 1: Check classes on collapsible content

   The collapsible div must have class collapse to enable Bootstrap's collapse behavior.

2. Step 2: Verify other attributes

   The aria-expanded attribute on the button is correct and data-bs-parent belongs on the collapse div. The container has an ID.

3. Final Answer:

   The accordion-collapse div is missing the collapse class -> Option A

4. Quick Check:

   collapse class missing = no toggle [OK]

Hint: Always add 'collapse' class to collapsible content div [OK]

Common Mistakes:

• Forgetting the 'collapse' class on content div
• Misplacing data-bs-parent attribute
• Removing aria-expanded attribute

5. You want to create an Accordion where only one section can be open at a time, and the first section is open by default. Which combination of attributes and classes achieves this behavior correctly?

hard

A. Add data-bs-single='true' to buttons and expanded attribute on first button

B. Add data-bs-toggle='accordion' to buttons and active class to first button

C. Use data-bs-multiple='false' on accordion container and open class on first item

D. Add data-bs-parent to each collapse div and add show class to the first collapse div

Solution

1. Step 1: Understand Bootstrap's single-open behavior

   Bootstrap uses data-bs-parent on collapse divs to ensure only one section is open at a time.

2. Step 2: Set default open section

   Adding the show class to the first collapse div makes it open by default on page load.

3. Step 3: Evaluate other options

   Attributes like data-bs-toggle='accordion', data-bs-multiple, or data-bs-single do not exist in Bootstrap 5 for this purpose.

4. Final Answer:

   Add data-bs-parent to each collapse div and add show class to the first collapse div -> Option D

5. Quick Check:

   data-bs-parent + show class = single open with default [OK]

Hint: Use data-bs-parent and show class for single open accordion [OK]

Common Mistakes:

• Using non-existent Bootstrap attributes
• Forgetting to add show class for default open
• Misplacing data-bs-parent attribute