Responsive navbar collapse in Bootsrap - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to add the Bootstrap class that makes the navbar responsive and collapsible.

Bootsrap

<nav class="navbar navbar-expand-[1] bg-light">
  <div class="container-fluid">
    <a class="navbar-brand" href="#">Brand</a>
  </div>
</nav>

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

Alg

Bsm

Cmd

Dxl

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'sm' or 'md' which collapse too early or too late.

Forgetting to add the 'navbar-expand-' prefix.

The class navbar-expand-lg makes the navbar expand on large screens and collapse on smaller ones.

2fill in blank

medium

Complete the code to add the button that toggles the navbar collapse on small screens.

Bootsrap

<button class="navbar-toggler" type="button" data-bs-toggle="[1]" data-bs-target="#navbarSupportedContent" aria-controls="navbarSupportedContent" aria-expanded="false" aria-label="Toggle navigation">
  <span class="navbar-toggler-icon"></span>
</button>

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

Adropdown

Bcollapse

Cmodal

Dtab

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'dropdown' which is for menus, not collapse.

Using 'modal' or 'tab' which are unrelated components.

The data-bs-toggle="collapse" attribute tells Bootstrap to toggle the collapse behavior for the navbar.

3fill in blank

hard

Fix the error in the navbar collapse container's id attribute to match the toggle button's target.

Bootsrap

<div class="collapse navbar-collapse" id="[1]">
  <ul class="navbar-nav me-auto mb-2 mb-lg-0">
    <li class="nav-item">
      <a class="nav-link active" aria-current="page" href="#">Home</a>
    </li>
  </ul>
</div>

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

AnavbarContent

BnavbarCollapse

CnavbarToggle

DnavbarSupportedContent

Attempts:

3 left

💡 Hint

Common Mistakes

Using a different id that does not match the toggle button's target.

Forgetting the id attribute entirely.

The id must match the data-bs-target value in the toggle button for the collapse to work.

4fill in blank

hard

Fill both blanks to complete the navbar list item with a link that is accessible and styled correctly.

Bootsrap

<li class="nav-item">
  <a class="nav-link [1]" aria-current="[2]" href="#">About</a>
</li>

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

Aactive

Bpage

Cdisabled

Dbutton

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'disabled' class which makes the link inactive.

Setting aria-current to 'button' which is incorrect.

The class active highlights the current page link, and aria-current="page" helps screen readers know this is the current page.

5fill in blank

hard

Fill all three blanks to complete the responsive navbar with a brand, toggle button, and collapsible menu.

Bootsrap

<nav class="navbar navbar-expand-[1] bg-light">
  <div class="container-fluid">
    <a class="navbar-brand" href="#">MySite</a>
    <button class="navbar-toggler" type="button" data-bs-toggle="[2]" data-bs-target="#navbarContent" aria-controls="navbarContent" aria-expanded="false" aria-label="Toggle navigation">
      <span class="navbar-toggler-icon"></span>
    </button>
    <div class="collapse navbar-collapse" id="[3]">
      <ul class="navbar-nav me-auto mb-2 mb-lg-0">
        <li class="nav-item">
          <a class="nav-link active" aria-current="page" href="#">Home</a>
        </li>
      </ul>
    </div>
  </div>
</nav>

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

Alg

Bcollapse

CnavbarContent

Dmd

Attempts:

3 left

💡 Hint

Common Mistakes

Mismatching the id and data-bs-target values.

Using wrong breakpoint abbreviations.

Using incorrect toggle actions like 'dropdown'.

The navbar expands on large screens (lg), the toggle button uses collapse to show/hide the menu, and the collapsible menu's id navbarContent matches the toggle button's target.

Practice

1. What is the main purpose of the navbar-toggler button in a Bootstrap responsive navbar?

easy

A. To change the navbar color

B. To show or hide the navigation menu on small screens

C. To add a logo to the navbar

D. To make the navbar fixed at the top

Solution

1. Step 1: Understand the role of navbar-toggler

   The navbar-toggler button is designed to toggle (show/hide) the navigation links when the screen is small.

2. Step 2: Connect to responsive behavior

   On small screens, the menu collapses and the toggler button controls its visibility.

3. Final Answer:

   To show or hide the navigation menu on small screens -> Option B

4. Quick Check:

   Navbar toggler = show/hide menu [OK]

Hint: Toggler button controls menu visibility on small screens [OK]

Common Mistakes:

• Thinking it changes navbar color
• Confusing it with logo placement
• Assuming it fixes navbar position

2. Which of the following is the correct Bootstrap class combination to make the navbar links collapsible?

easy

A. navbar-collapse

B. navbar-toggler collapse

C. collapse navbar-collapse

D. navbar-expand collapse

Solution

1. Step 1: Identify the correct class order

   Bootstrap requires the classes collapse and navbar-collapse together to make the menu collapsible.

2. Step 2: Confirm the required classes

   The combination collapse navbar-collapse provides both the collapse functionality and navbar styling.

3. Final Answer:

   <div class='collapse navbar-collapse'> -> Option C

4. Quick Check:

   Collapse + navbar-collapse = collapsible menu [OK]

Hint: Use 'collapse navbar-collapse' exactly for collapsible menu [OK]

Common Mistakes:

• Missing the collapse class
• Using 'navbar-toggler' instead
• Mixing 'navbar-expand' with collapse

3. Given this HTML snippet, what happens when the screen width is small and the toggler button is clicked?

<nav class="navbar navbar-expand-lg navbar-light bg-light">
  <button class="navbar-toggler" type="button" data-bs-toggle="collapse" data-bs-target="#navMenu">
    <span class="navbar-toggler-icon"></span>
  </button>
  <div class="collapse navbar-collapse" id="navMenu">
    <ul class="navbar-nav">
      <li class="nav-item"><a class="nav-link" href="#">Home</a></li>
      <li class="nav-item"><a class="nav-link" href="#">About</a></li>
    </ul>
  </div>
</nav>

medium

A. The menu items are always visible regardless of screen size

B. The navbar changes color

C. Nothing happens because the button is missing an ID

D. The menu items appear or disappear when the toggler is clicked

Solution

1. Step 1: Understand the toggler and collapse connection

   The button toggles the element with ID navMenu which has classes collapse navbar-collapse.

2. Step 2: Behavior on small screens

   On small screens, the menu is hidden by default and appears when the toggler is clicked, then hides again on next click.

3. Final Answer:

   The menu items appear or disappear when the toggler is clicked -> Option D

4. Quick Check:

   Toggler click = toggle menu visibility [OK]

Hint: Toggler button toggles menu visibility on small screens [OK]

Common Mistakes:

• Thinking button needs an ID instead of data-bs-target
• Assuming color changes on toggle
• Believing menu is always visible

4. What is wrong with this navbar code that prevents the collapse from working?

<nav class="navbar navbar-expand-lg navbar-light bg-light">
  <button class="navbar-toggler" type="button" data-toggle="collapse" data-target="#menu">
    <span class="navbar-toggler-icon"></span>
  </button>
  <div class="collapse navbar-collapse" id="menu">
    <ul class="navbar-nav">
      <li class="nav-item"><a class="nav-link" href="#">Link</a></li>
    </ul>
  </div>
</nav>

medium

A. The attributes should be data-bs-toggle and data-bs-target instead of data-toggle and data-target

B. The button is missing the class navbar-collapse

C. The div should have class navbar-toggler instead of collapse

D. The id attribute on the div is missing

Solution

1. Step 1: Check Bootstrap 5 attribute naming

   Bootstrap 5 uses data-bs-toggle and data-bs-target instead of data-toggle and data-target.

2. Step 2: Identify impact on collapse functionality

   Using old attribute names prevents the toggler from controlling the collapse behavior.

3. Final Answer:

   Use data-bs-toggle and data-bs-target attributes -> Option A

4. Quick Check:

   Bootstrap 5 uses data-bs-* attributes [OK]

Hint: Use data-bs-toggle and data-bs-target for Bootstrap 5 [OK]

Common Mistakes:

• Using old Bootstrap 4 attribute names
• Adding wrong classes to button or div
• Missing id attribute on collapse div

5. You want a navbar that collapses on medium screens and smaller, but stays expanded on large screens and above. Which class should you use on the <nav> element to achieve this?

hard

A. navbar-expand-lg

B. navbar-expand-md

C. navbar-expand-sm

D. navbar-expand-xl

Solution

1. Step 1: Understand Bootstrap expand classes

   The class navbar-expand-lg means the navbar is expanded from large screens (992px) and larger, and collapses below large (medium and smaller).

2. Step 2: Match requirement to class

   Collapses on medium (768px) and smaller, expands on large and above: navbar-expand-lg.

3. Final Answer:

   navbar-expand-lg -> Option A

4. Quick Check:

   Expand from lg up means collapse md and below [OK]

Hint: Use navbar-expand-lg to collapse on medium and smaller [OK]

Common Mistakes:

• Choosing navbar-expand-md which expands from medium (too early)
• Using navbar-expand-sm which expands too early
• Confusing xl with lg breakpoints