Checkboxes and radios in Bootsrap - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to create a Bootstrap checkbox input.

Bootsrap

<div class="form-check">
  <input class="form-check-input" type="[1]" id="check1">
  <label class="form-check-label" for="check1">Option 1</label>
</div>

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

Atext

Bradio

Ccheckbox

Dbutton

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'radio' instead of 'checkbox' for the input type.

Using 'text' which creates a text box, not a checkbox.

The type attribute for a checkbox input must be checkbox to create a checkbox.

2fill in blank

medium

Complete the code to create a Bootstrap radio button input.

Bootsrap

<div class="form-check">
  <input class="form-check-input" type="[1]" name="options" id="radio1">
  <label class="form-check-label" for="radio1">Choice A</label>
</div>

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

Aradio

Bcheckbox

Cbutton

Dtext

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'checkbox' instead of 'radio' for the input type.

Using 'button' which does not create a radio button.

The type attribute for a radio button input must be radio to create a radio button.

3fill in blank

hard

Fix the error in the code to correctly group radio buttons so only one can be selected.

Bootsrap

<div class="form-check">
  <input class="form-check-input" type="radio" name="[1]" id="radioA">
  <label class="form-check-label" for="radioA">Option A</label>
</div>
<div class="form-check">
  <input class="form-check-input" type="radio" name="[1]" id="radioB">
  <label class="form-check-label" for="radioB">Option B</label>
</div>

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

Agroup1

Boption1

Cradio

Dcheckbox

Attempts:

3 left

💡 Hint

Common Mistakes

Giving different name values so radios act independently.

Using 'checkbox' as the name value which is invalid.

Radio buttons are grouped by giving them the same name attribute value. This ensures only one can be selected at a time.

4fill in blank

hard

Fill both blanks to create a disabled Bootstrap checkbox with label 'Accept Terms'.

Bootsrap

<div class="form-check">
  <input class="form-check-input" type="[1]" id="acceptTerms" [2]>
  <label class="form-check-label" for="acceptTerms">Accept Terms</label>
</div>

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

Acheckbox

Bradio

Cdisabled

Dreadonly

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'radio' instead of 'checkbox' for the input type.

Using 'readonly' which does not disable checkboxes.

Use checkbox as the input type for a checkbox. Add the disabled attribute to make it unclickable.

5fill in blank

hard

Fill all three blanks to create a group of three radio buttons named 'color' with labels Red, Green, Blue.

Bootsrap

<div class="form-check">
  <input class="form-check-input" type="[1]" name="[2]" id="red">
  <label class="form-check-label" for="red">Red</label>
</div>
<div class="form-check">
  <input class="form-check-input" type="[1]" name="[2]" id="green">
  <label class="form-check-label" for="green">Green</label>
</div>
<div class="form-check">
  <input class="form-check-input" type="[1]" name="[2]" id="blue">
  <label class="form-check-label" for="blue">Blue</label>
</div>

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

Acheckbox

Bcolor

Cradio

Doption

Attempts:

3 left

💡 Hint

Common Mistakes

Using different names for each radio input so they don't group.

Using 'checkbox' instead of 'radio' for the input type.

Use radio as the input type for radio buttons. Use the same name attribute value 'color' to group them.

Practice

1. What is the main difference between checkboxes and radio buttons in Bootstrap forms?

easy

A. Radios can be unchecked by clicking again; checkboxes cannot.

B. Checkboxes allow multiple selections; radios allow only one selection.

C. Checkboxes are styled differently but behave the same as radios.

D. Checkboxes allow only one selection; radios allow multiple selections.

Solution

1. Step 1: Understand checkbox behavior

   Checkboxes let users pick more than one option at the same time.

2. Step 2: Understand radio button behavior

   Radio buttons let users pick only one option from a group.

3. Final Answer:

   Checkboxes allow multiple selections; radios allow only one selection. -> Option B

4. Quick Check:

   Checkboxes = multiple, Radios = single [OK]

Hint: Checkboxes = many choices, radios = one choice [OK]

Common Mistakes:

• Confusing which input allows multiple selections
• Thinking radios can be unchecked by clicking again
• Assuming checkboxes behave like radios

2. Which of the following is the correct Bootstrap structure for a single checkbox input with label?

easy

A. Option 1

B. Option 1

C. Option 1

D. Option 1

Solution

1. Step 1: Check input and label classes

   Bootstrap requires form-check-input on the input and form-check-label on the label.

2. Step 2: Verify input type and id-label connection

   The input must be type checkbox and the label's for attribute must match input's id.

3. Final Answer:

   Option A has correct classes, input type, and label connection. -> Option A

4. Quick Check:

   Correct classes and matching id-for =
   Option 1 [OK]

Hint: Input uses form-check-input; label uses form-check-label [OK]

Common Mistakes:

• Swapping classes between input and label
• Using wrong input type for checkbox
• Not matching label's for attribute with input id

3. What will be the visual result of this Bootstrap code snippet?

<div class='form-check'>
  <input class='form-check-input' type='radio' name='color' id='red' checked>
  <label class='form-check-label' for='red'>Red</label>
</div>
<div class='form-check'>
  <input class='form-check-input' type='radio' name='color' id='blue'>
  <label class='form-check-label' for='blue'>Blue</label>
</div>

medium

A. Two checkboxes labeled Red and Blue; Blue is selected by default.

B. Two radio buttons labeled Red and Blue; none selected by default.

C. Two radio buttons labeled Red and Blue; Red is selected by default.

D. Two checkboxes labeled Red and Blue; Red is selected by default.

Solution

1. Step 1: Identify input types and attributes

   Both inputs are radio buttons with the same name 'color', so only one can be selected.

2. Step 2: Check which radio is checked by default

   The input with id 'red' has the checked attribute, so it is selected initially.

3. Final Answer:

   Two radio buttons labeled Red and Blue; Red is selected by default. -> Option C

4. Quick Check:

   Radio with checked attribute = selected [OK]

Hint: Look for checked attribute on radio inputs [OK]

Common Mistakes:

• Confusing radio buttons with checkboxes
• Ignoring the checked attribute
• Assuming multiple radios can be selected

4. Identify the error in this Bootstrap checkbox code:

<div class='form-check'>
  <input class='form-check-input' type='checkbox' id='agree'>
  <label class='form-check-label' id='agree'>I agree</label>
</div>

medium

A. The input type should be radio, not checkbox.

B. The input is missing the class form-check-label.

C. The div should have class form-check-input instead of form-check.

D. The label uses id instead of for attribute to link to input.

Solution

1. Step 1: Check label linkage to input

   Labels must use the for attribute matching the input's id for accessibility and clicking.

2. Step 2: Identify incorrect attribute usage

   The label incorrectly uses id='agree' instead of for='agree'.

3. Final Answer:

   The label uses id instead of for attribute to link to input. -> Option D

4. Quick Check:

   Label uses for, not id, to link input [OK]

Hint: Label must use for attribute matching input id [OK]

Common Mistakes:

• Using id on label instead of for
• Missing form-check-input class on input
• Confusing input types checkbox vs radio

5. You want to create a group of checkboxes in Bootstrap where users can select multiple fruits. Which code snippet correctly implements this with accessible labels and Bootstrap styling?

hard

A. \n \n Apple\n\n\n \n Banana\n

B. \n \n Apple\n\n\n \n Banana\n

C. \n \n Apple\n\n\n \n Banana\n

D. \n \n Apple\n\n\n \n Banana\n

Solution

1. Step 1: Confirm input types for multiple selection

   Checkboxes allow multiple selections, so input type must be checkbox.

2. Step 2: Check label and input classes and attributes

   Inputs must have class form-check-input, labels must have form-check-label, and labels must use for matching input id.

3. Step 3: Verify unique ids and consistent names

   Each checkbox has a unique id and the same name attribute to group them logically.

4. Final Answer:

   Option A correctly uses checkboxes with proper classes, unique ids, and accessible labels. -> Option A

5. Quick Check:

   Checkboxes + form-check-input + matching for/id =
   \n \n Apple\n\n

   \n \n Banana\n

   [OK]

Hint: Use checkbox type and matching for/id for labels [OK]

Common Mistakes:

• Using radio buttons instead of checkboxes for multiple choices
• Repeating ids for different inputs
• Swapping input and label classes