Modal structure and triggers in Bootsrap - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to create a button that opens a modal when clicked.

Bootsrap

<button type="button" class="btn btn-primary" data-bs-toggle="[1]" data-bs-target="#exampleModal">
  Launch demo modal
</button>

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

Atooltip

Bmodal

Cdropdown

Dcollapse

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'dropdown' or 'tooltip' instead of 'modal' for the toggle attribute.

The attribute data-bs-toggle="modal" tells Bootstrap that this button will open a modal window.

2fill in blank

medium

Complete the modal container element with the correct class to define the modal dialog.

Bootsrap

<div class="modal fade" id="exampleModal" tabindex="-1" aria-labelledby="exampleModalLabel" aria-hidden="true">
  <div class="[1]">
    <div class="modal-content">
      <!-- Modal content here -->
    </div>
  </div>
</div>

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

Amodal-dialog

Bmodal-body

Cmodal-header

Dmodal-footer

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'modal-body' or 'modal-header' instead of 'modal-dialog' for the dialog container.

The 'modal-dialog' class wraps the modal content and defines the modal's dialog box.

3fill in blank

hard

Fix the error in the modal close button by completing the attribute that dismisses the modal.

Bootsrap

<button type="button" class="btn-close" data-bs-[1]="modal" aria-label="Close"></button>

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

Aclose

Btoggle

Cdismiss

Dhide

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'data-bs-toggle' or 'data-bs-hide' instead of 'data-bs-dismiss'.

The attribute data-bs-dismiss="modal" tells Bootstrap to close the modal when this button is clicked.

4fill in blank

hard

Fill both blanks to create a modal header with a title and a close button.

Bootsrap

<div class="modal-header">
  <h5 class="modal-title" id="exampleModalLabel">[1]</h5>
  <button type="button" class="btn-close" data-bs-[2]="modal" aria-label="Close"></button>
</div>

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

AModal Title

Bdismiss

Ctoggle

DClose

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'toggle' instead of 'dismiss' for the close button attribute.

Putting 'Close' as the title text instead of a descriptive title.

The modal title is placed inside the

element, and the close button uses data-bs-dismiss="modal" to close the modal.

5fill in blank

hard

Fill all three blanks to create a modal with a button trigger, modal dialog, and close button.

Bootsrap

<button type="button" class="btn btn-primary" data-bs-toggle="[1]" data-bs-target="#myModal">
  Open Modal
</button>

<div class="modal fade" id="myModal" tabindex="-1" aria-hidden="true">
  <div class="[2]">
    <div class="modal-content">
      <div class="modal-header">
        <h5 class="modal-title">My Modal</h5>
        <button type="button" class="btn-close" data-bs-[3]="modal" aria-label="Close"></button>
      </div>
      <div class="modal-body">
        Content goes here.
      </div>
    </div>
  </div>
</div>

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

Amodal

Bmodal-dialog

Cdismiss

Dtoggle

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'toggle' instead of 'dismiss' for the close button.

Using wrong class names for the modal dialog container.

The button uses data-bs-toggle="modal" to open the modal, the dialog container uses class 'modal-dialog', and the close button uses data-bs-dismiss="modal" to close it.

Practice

1. What attribute do you add to a button to open a Bootstrap modal when clicked?

easy

A. modal-open

B. data-toggle="modal"

C. data-bs-toggle="modal"

D. open-modal

Solution

1. Step 1: Understand Bootstrap modal trigger attributes

   Bootstrap requires data-bs-toggle="modal" on the trigger element to activate modal functionality.

2. Step 2: Compare options with Bootstrap docs

   Only data-bs-toggle="modal" uses the correct Bootstrap 5+ attribute syntax for toggling modals.

3. Final Answer:

   data-bs-toggle="modal" -> Option C

4. Quick Check:

   Modal trigger attribute = data-bs-toggle="modal" [OK]

Hint: Look for data-bs-toggle="modal" on buttons to open modals [OK]

Common Mistakes:

• Using old Bootstrap 4 attribute data-toggle instead of data-bs-toggle
• Using class names instead of data attributes
• Forgetting the data-bs-toggle attribute

2. Which of the following is the correct way to specify the target modal in a button?

easy

A. data-bs-target="#modalExample"

B. target="#modalExample"

C. data-target="#modalExample"

D. data-bs-target="modalExample"

Solution

1. Step 1: Identify the correct attribute for modal target

   Bootstrap uses data-bs-target with a CSS selector to specify which modal to open.

2. Step 2: Confirm the selector format

   The value must be an ID selector starting with #, so #modalExample is correct.

3. Final Answer:

   data-bs-target="#modalExample" -> Option A

4. Quick Check:

   Modal target attribute = data-bs-target="#id" [OK]

Hint: Use data-bs-target="#modalID" with # for modal ID [OK]

Common Mistakes:

• Omitting the # in the target selector
• Using data-target instead of data-bs-target
• Using just the modal ID without #

3. Given this HTML snippet, what will happen when the button is clicked?

<button type="button" class="btn btn-primary" data-bs-toggle="modal" data-bs-target="#myModal">Open</button>

<div class="modal fade" id="myModal" tabindex="-1" aria-hidden="true">
  <div class="modal-dialog">
    <div class="modal-content">
      <div class="modal-header">
        <h5 class="modal-title">Title</h5>
        <button type="button" class="btn-close" data-bs-dismiss="modal" aria-label="Close"></button>
      </div>
      <div class="modal-body">Content here</div>
      <div class="modal-footer">
        <button type="button" class="btn btn-secondary" data-bs-dismiss="modal">Close</button>
      </div>
    </div>
  </div>
</div>

medium

A. The modal with title and content appears on top of the page

B. Nothing happens because the modal is missing the show class

C. The page reloads because the button has no type

D. An error appears because aria-hidden is true

Solution

1. Step 1: Check button attributes for modal trigger

   The button has data-bs-toggle="modal" and data-bs-target="#myModal", so it triggers the modal with ID myModal.

2. Step 2: Understand modal structure and behavior

   The modal has correct structure and Bootstrap JS will add the show class dynamically to display it. aria-hidden="true" is default and toggled automatically.

3. Final Answer:

   The modal with title and content appears on top of the page -> Option A

4. Quick Check:

   Modal triggers show modal content on click [OK]

Hint: Modal shows on click if data-bs-toggle and data-bs-target are correct [OK]

Common Mistakes:

• Thinking modal needs show class initially
• Confusing aria-hidden attribute as an error
• Assuming button reloads page without type="button"

4. Identify the error in this modal trigger button code:

<button class="btn btn-primary" data-bs-toggle="modal" data-bs-target="myModal">Open</button>

medium

A. Button missing type="button" attribute

B. Missing # in data-bs-target value

C. data-bs-toggle should be data-toggle

D. Button must be inside the modal

Solution

1. Step 1: Check data-bs-target attribute format

   The value must be a CSS selector with # for ID. Here it is missing the # before myModal.

2. Step 2: Verify other attributes

   Button type="button" is recommended but not an error. data-bs-toggle is correct for Bootstrap 5+. Button can be outside modal.

3. Final Answer:

   Missing # in data-bs-target value -> Option B

4. Quick Check:

   Modal target needs #id selector [OK]

Hint: Always prefix modal ID with # in data-bs-target [OK]

Common Mistakes:

• Omitting # in data-bs-target
• Confusing Bootstrap 4 and 5 attribute names
• Thinking button must be inside modal

5. You want a modal that opens when a link is clicked and closes when the user presses Escape or clicks outside. Which is the correct minimal setup for the link and modal?

hard

A. <button data-bs-toggle="modal" data-bs-target="#myModal">Open</button> and modal with data-bs-keyboard="false"

B. <a href="#myModal" data-toggle="modal">Open</a> and modal with tabindex="0"

C. <a href="#" data-bs-toggle="modal" data-bs-target="myModal">Open</a> and modal with tabindex="-1" only

D. <a href="#" data-bs-toggle="modal" data-bs-target="#myModal">Open</a> and modal with tabindex="-1" and data-bs-backdrop="true"

Solution

1. Step 1: Confirm trigger element setup

   Using an anchor with href="#", data-bs-toggle="modal", and data-bs-target="#myModal" correctly triggers the modal.

2. Step 2: Check modal attributes for accessibility and behavior

   Modal needs tabindex="-1" for focus management and data-bs-backdrop="true" (default) to close on outside click and Escape key.

3. Final Answer:

   Anchor with data-bs-toggle and data-bs-target plus modal with tabindex="-1" and data-bs-backdrop="true" -> Option D

4. Quick Check:

   Modal triggers + tabindex + backdrop enable open/close [OK]

Hint: Use tabindex="-1" and data-bs-backdrop="true" for modal accessibility [OK]

Common Mistakes:

• Using data-toggle instead of data-bs-toggle
• Missing tabindex="-1" on modal
• Disabling keyboard with data-bs-keyboard="false" prevents Escape close