Accordion flush variant in Bootsrap - Cheat Sheet & Quick Revision

Recall & Review

beginner

What is the <code>accordion-flush</code> class used for in Bootstrap?

The <code>accordion-flush</code> class removes the default background, borders, and rounded corners from the accordion, making it flush with the parent container for a cleaner, minimal look.

beginner

How do you make a Bootstrap accordion flush variant?

Add the <code>accordion-flush</code> class to the main <code>&lt;div&gt;</code> with the <code>accordion</code> class, like <code>&lt;div class="accordion accordion-flush"&gt;</code>.

beginner

What visual difference will you see when using accordion-flush compared to a regular accordion?

The flush variant removes the outer borders and spacing between accordion items, so the content panels appear connected without extra padding or background color.

intermediate

Can you use accordion-flush with all Bootstrap accordion features like collapse and expand?

Yes, accordion-flush only changes the styling. All interactive features like collapsing and expanding items work the same as the default accordion.

intermediate

Why might you choose the flush variant for an accordion in your web design?

You might choose it to create a cleaner, simpler look that blends better with the page layout, especially when you want the accordion to appear as part of a seamless content section.

Which class do you add to a Bootstrap accordion to make it flush?

A accordion-clean

B accordion-borderless

C accordion-simple

D accordion-flush

The correct class to make a Bootstrap accordion flush is accordion-flush.

What happens visually when you use accordion-flush?

A Removes borders and background for a seamless look

B Disables accordion collapse functionality

C Changes text color to gray

D Adds extra padding around items

The flush variant removes borders and background to create a seamless, minimal style.

Does accordion-flush affect the accordion's expand/collapse behavior?

A Yes, it disables collapse

B No, it only changes styling

C Yes, it adds animation

D No, it changes the text only

accordion-flush only changes the look, not the interactive behavior.

Where should you place the accordion-flush class?

A On the accordion container div

B On each accordion item

C On the accordion button

D On the accordion body

The accordion-flush class goes on the main accordion container div alongside accordion.

Why might a designer prefer the flush accordion style?

A To add more colors

B To increase spacing between items

C To create a cleaner, borderless look

D To disable accordion functionality

The flush style is chosen for a cleaner, borderless appearance that blends with the page.

Explain how to create a flush variant accordion in Bootstrap and describe its visual effect.

Think about which class changes the accordion's style without affecting its function.

Why would you use the accordion flush variant instead of the default accordion style?

Consider the visual style and how it fits with other page elements.

Practice

1. What is the main visual difference when using the accordion-flush class in Bootstrap's accordion component?

easy

A. It removes the default background and borders between accordion items for a seamless look.

B. It adds extra padding inside each accordion item for better spacing.

C. It changes the accordion headers to use a different font style.

D. It makes the accordion items collapsible only on hover.

Solution

1. Step 1: Understand the accordion-flush class purpose

   The accordion-flush class is designed to remove the default background color and borders between accordion items.

2. Step 2: Visual effect of accordion-flush

   This creates a seamless, flush look where accordion items appear connected without spacing or borders.

3. Final Answer:

   It removes the default background and borders between accordion items for a seamless look. -> Option A

4. Quick Check:

   accordion-flush = seamless borderless accordion [OK]

Hint: Remember flush means no gaps or borders between items [OK]

Common Mistakes:

• Thinking it adds padding instead of removing borders
• Confusing flush with changing fonts or colors
• Assuming it changes accordion behavior on hover

2. Which of the following is the correct way to apply the flush style to a Bootstrap accordion?

easy

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

B. <div class='accordion accordion-flush' id='myAccordion'>

C. <div class='accordion flush' id='myAccordion'>

D. <div class='accordion-flush accordion' id='myAccordion'>

Solution

1. Step 1: Check Bootstrap class naming conventions

   Bootstrap requires the base class accordion plus the modifier accordion-flush together on the same element.

2. Step 2: Verify correct class order and syntax

   The correct syntax is class='accordion accordion-flush'. Other options miss the base class or use incorrect class names.

3. Final Answer:

   <div class='accordion accordion-flush' id='myAccordion'> -> Option B

4. Quick Check:

   Base + flush classes together = correct syntax [OK]

Hint: Always include base class 'accordion' with 'accordion-flush' [OK]

Common Mistakes:

• Using only 'accordion-flush' without 'accordion'
• Swapping class order incorrectly
• Using 'flush' alone as a class

3. Given the following code snippet, what will be the visual result in the browser?

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

medium

A. An accordion with flush style but Item 1 expanded by default.

B. An accordion with default borders and Item 1 expanded by default.

C. An accordion with flush style: no borders between items and a collapsed button for Item 1.

D. An accordion with default style and all items collapsed.

Solution

1. Step 1: Identify the accordion style

   The accordion-flush class is applied, so the accordion will have no borders between items (flush style).

2. Step 2: Check the button state and collapse class

   The button has class collapsed and the collapse div has class collapse (not show), so the item is collapsed by default.

3. Final Answer:

   An accordion with flush style: no borders between items and a collapsed button for Item 1. -> Option C

4. Quick Check:

   Flush + collapsed button = An accordion with flush style: no borders between items and a collapsed button for Item 1. [OK]

Hint: Look for 'accordion-flush' and 'collapsed' classes to predict style and state [OK]

Common Mistakes:

• Assuming default borders appear with flush class
• Thinking collapsed button means expanded content
• Confusing 'collapse' and 'show' classes

4. You wrote this Bootstrap accordion with flush variant, but the borders still appear between items. What is the likely cause?

<div class='accordion flush' id='accordionExample'>
  <div class='accordion-item'> ... </div>
</div>

medium

A. Missing the base accordion class alongside accordion-flush.

B. Accordion items must have flush class individually.

C. Not including Bootstrap JavaScript file.

D. Using flush instead of accordion-flush class.

Solution

1. Step 1: Check the class names used

   The code uses class='accordion flush', but the correct flush variant class is accordion-flush.

2. Step 2: Understand effect of incorrect class

   Using flush alone does nothing; the flush style is not applied, so borders remain visible.

3. Final Answer:

   Using flush instead of accordion-flush class. -> Option D

4. Quick Check:

   Correct flush class is 'accordion-flush' not 'flush' [OK]

Hint: Use exact class 'accordion-flush' for flush style [OK]

Common Mistakes:

• Typing 'flush' instead of 'accordion-flush'
• Forgetting to include 'accordion' base class
• Assuming JS affects border styles

5. You want to create a flush accordion with three items where only one item can be open at a time. Which of the following code snippets correctly implements this behavior?

hard

A. <div class='accordion accordion-flush' id='accordionFlushExample'>
<div class='accordion-item'>
<h2 class='accordion-header' id='flush-headingOne'>
<button class='accordion-button collapsed' type='button' data-bs-toggle='collapse' data-bs-target='#flush-collapseOne' aria-expanded='false' aria-controls='flush-collapseOne'>Item 1</button>
</h2>
<div id='flush-collapseOne' class='accordion-collapse collapse' aria-labelledby='flush-headingOne' data-bs-parent='#accordionFlushExample'>
<div class='accordion-body'>Content 1</div>
</div>
</div>
<!-- Repeat for items 2 and 3 with unique IDs and same data-bs-parent -->
</div>

B. <div class='accordion accordion-flush' id='accordionFlushExample'>
<div class='accordion-item'>
<h2 class='accordion-header' id='flush-headingOne'>
<button class='accordion-button' type='button' data-bs-toggle='collapse' data-bs-target='#flush-collapseOne' aria-expanded='true' aria-controls='flush-collapseOne'>Item 1</button>
</h2>
<div id='flush-collapseOne' class='accordion-collapse collapse show' aria-labelledby='flush-headingOne' data-bs-parent='#accordionFlushExample'>
<div class='accordion-body'>Content 1</div>
</div>
</div>
<!-- Items 2 and 3 missing data-bs-parent attribute -->
</div>

C. <div class='accordion accordion-flush' id='accordionFlushExample'>
<div class='accordion-item'>
<h2 class='accordion-header' id='flush-headingOne'>
<button class='accordion-button collapsed' type='button' data-bs-toggle='collapse' data-bs-target='#flush-collapseOne' aria-expanded='false' aria-controls='flush-collapseOne'>Item 1</button>
</h2>
<div id='flush-collapseOne' class='accordion-collapse collapse' aria-labelledby='flush-headingOne'>
<div class='accordion-body'>Content 1</div>
</div>
</div>
<!-- Items 2 and 3 with data-bs-parent but missing unique IDs -->
</div>

D. <div class='accordion accordion-flush' id='accordionFlushExample'>
<div class='accordion-item'>
<h2 class='accordion-header' id='flush-headingOne'>
<button class='accordion-button collapsed' type='button' data-bs-toggle='collapse' data-bs-target='#flush-collapseOne' aria-expanded='false' aria-controls='flush-collapseOne'>Item 1</button>
</h2>
<div id='flush-collapseOne' class='accordion-collapse collapse' aria-labelledby='flush-headingOne' data-bs-parent='#accordionFlushExample'>
<div class='accordion-body'>Content 1</div>
</div>
</div>
<!-- Items 2 and 3 with duplicate IDs and missing data-bs-parent -->
</div>

Solution

1. Step 1: Confirm flush style and unique IDs

   <div class='accordion accordion-flush' id='accordionFlushExample'>
     <div class='accordion-item'>
       <h2 class='accordion-header' id='flush-headingOne'>
         <button class='accordion-button collapsed' type='button' data-bs-toggle='collapse' data-bs-target='#flush-collapseOne' aria-expanded='false' aria-controls='flush-collapseOne'>Item 1</button>
       </h2>
       <div id='flush-collapseOne' class='accordion-collapse collapse' aria-labelledby='flush-headingOne' data-bs-parent='#accordionFlushExample'>
         <div class='accordion-body'>Content 1</div>
       </div>
     </div>
     <!-- Repeat for items 2 and 3 with unique IDs and same data-bs-parent -->
   </div>

   correctly uses accordion accordion-flush and unique IDs for each item and collapse panel.

2. Step 2: Check data-bs-parent attribute for exclusive open behavior

   <div class='accordion accordion-flush' id='accordionFlushExample'>
     <div class='accordion-item'>
       <h2 class='accordion-header' id='flush-headingOne'>
         <button class='accordion-button collapsed' type='button' data-bs-toggle='collapse' data-bs-target='#flush-collapseOne' aria-expanded='false' aria-controls='flush-collapseOne'>Item 1</button>
       </h2>
       <div id='flush-collapseOne' class='accordion-collapse collapse' aria-labelledby='flush-headingOne' data-bs-parent='#accordionFlushExample'>
         <div class='accordion-body'>Content 1</div>
       </div>
     </div>
     <!-- Repeat for items 2 and 3 with unique IDs and same data-bs-parent -->
   </div>

   includes data-bs-parent='#accordionFlushExample' on each collapse div, ensuring only one item opens at a time.

3. Final Answer:

   Option A correctly implements a flush accordion with exclusive open items. -> Option A

4. Quick Check:

   Flush + unique IDs + data-bs-parent = exclusive open accordion [OK]

Hint: Use data-bs-parent with unique IDs for exclusive flush accordion [OK]

Common Mistakes:

• Missing data-bs-parent causing multiple items open
• Duplicate or missing unique IDs breaking collapse behavior
• Incorrect or missing flush class