Button styles and variants in Bootsrap - Cheat Sheet & Quick Revision

Recall & Review

beginner

What is the basic class used to create a button in Bootstrap?

The basic class is <code>btn</code>. It styles an element as a button with Bootstrap's default look.

beginner

Name three Bootstrap button variant classes and their typical colors.

• btn-primary: Blue, used for main actions.
• btn-secondary: Gray, used for less important actions.
• btn-success: Green, used for positive actions like 'Save'.

intermediate

How do you make a Bootstrap button appear larger or smaller?

Add btn-lg for a large button or btn-sm for a small button alongside btn and the variant class.

beginner

What class would you add to a Bootstrap button to make it look like a link?

Use the class btn-link. It styles the button to look like a simple text link but keeps button behavior.

beginner

How can you disable a Bootstrap button so it cannot be clicked?

Add the disabled attribute to the button element or add the class disabled for links styled as buttons.

Which class combination creates a large, green Bootstrap button?

A btn btn-success btn-lg

B btn btn-primary btn-sm

C btn btn-secondary btn-lg

D btn btn-link btn-lg

The class btn-success makes the button green, and btn-lg makes it large.

What does the btn-outline-primary class do?

A Creates a button with a blue background

B Creates a button that looks like a link

C Creates a disabled button

D Creates a button with a blue border and transparent background

btn-outline-primary creates a button with a blue border and transparent background, giving a lighter style.

How do you make a Bootstrap button fill the full width of its container?

A Add class <code>btn-wide</code>

B Add class <code>btn-full</code>

C Add class <code>btn-block</code>

D Add class <code>btn-fluid</code>

The class btn-block makes the button stretch to fill the container's width.

Which attribute or class disables a Bootstrap button?

A class <code>btn-disabled</code>

B disabled attribute or class <code>disabled</code>

C readonly attribute

D class <code>btn-off</code>

Adding the disabled attribute or the class disabled disables the button.

What is the purpose of the btn-link class?

A To create a button that looks like a hyperlink

B To create a button with a link icon

C To create a button that opens a new tab

D To create a disabled button

btn-link styles the button to look like a text link but keeps button functionality.

Explain how to create different button styles in Bootstrap and when you might use each variant.

Think about how colors help users understand button importance.

Describe how to adjust the size and disabled state of Bootstrap buttons.

Consider how size changes the button's look and how disabling prevents clicks.

Practice

1. Which Bootstrap class combination correctly creates a blue primary button?

easy

A. btn btn-secondary

B. btn btn-danger

C. btn btn-warning

D. btn btn-primary

Solution

1. Step 1: Understand Bootstrap button base class

   All Bootstrap buttons require the base class btn to apply button styles.

2. Step 2: Identify the variant for blue color

   The btn-primary class applies the blue color variant to the button.

3. Final Answer:

   <button class='btn btn-primary'> -> Option D

4. Quick Check:

   Blue primary button = btn btn-primary [OK]

Hint: Primary buttons always use btn-primary class [OK]

Common Mistakes:

• Using btn-danger for blue instead of red
• Omitting the base btn class
• Confusing btn-secondary with btn-primary

2. Which of the following is the correct syntax to create a small green success button in Bootstrap?

easy

A. <button class='btn btn-primary btn-sm'>Success</button>

B. <button class='btn btn-success btn-sm'>Success</button>

C. <button class='btn btn-success btn-lg'>Success</button>

D. <button class='btn btn-danger btn-sm'>Success</button>

Solution

1. Step 1: Identify the success variant class

   The green color for success buttons is applied with btn-success.

2. Step 2: Choose the small size modifier

   The class btn-sm makes the button smaller in size.

3. Final Answer:

   <button class='btn btn-success btn-sm'>Success</button> -> Option B

4. Quick Check:

   Small green button = btn-success btn-sm [OK]

Hint: Use btn-sm for small size and btn-success for green [OK]

Common Mistakes:

• Using btn-lg instead of btn-sm for small size
• Mixing btn-primary with success text
• Forgetting the btn base class

3. What color will the button have when using this code?

<button class='btn btn-warning btn-lg'>Warning</button>

medium

A. Yellow

B. Red

C. Blue

D. Green

Solution

1. Step 1: Identify the variant class

   The class btn-warning applies a yellow/orange color to the button.

2. Step 2: Understand the size modifier

   The btn-lg class makes the button larger but does not affect color.

3. Final Answer:

   Yellow -> Option A

4. Quick Check:

   btn-warning = Yellow color [OK]

Hint: Warning buttons use btn-warning for yellow color [OK]

Common Mistakes:

• Confusing btn-warning with btn-danger (red)
• Thinking btn-lg changes color
• Mixing btn-primary with warning text

4. Identify the error in this Bootstrap button code:

<button class='btn btn-info btn-small'>Info</button>

medium

A. btn-info is not a valid variant

B. Button text should be uppercase

C. btn-small is not a valid size class

D. Missing btn base class

Solution

1. Step 1: Check variant class validity

   btn-info is a valid Bootstrap variant for a light blue button.

2. Step 2: Verify size class correctness

   Bootstrap uses btn-sm and btn-lg for sizes, not btn-small.

3. Final Answer:

   btn-small is not a valid size class -> Option C

4. Quick Check:

   Size classes are btn-sm or btn-lg only [OK]

Hint: Use btn-sm or btn-lg for sizes, not btn-small [OK]

Common Mistakes:

• Using btn-small instead of btn-sm
• Assuming btn-info is invalid
• Forgetting btn base class (not the case here)

5. You want a dark-themed button that is large and has a warning color. Which class combination achieves this correctly?

hard

A. btn btn-dark btn-lg

B. btn btn-warning btn-lg

C. btn btn-warning btn-dark btn-lg

D. btn btn-dark-warning btn-lg

Solution

1. Step 1: Understand Bootstrap button variants

   Bootstrap does not have a combined variant like btn-dark-warning. Variants are separate classes like btn-warning (yellow) or btn-dark (dark gray).

2. Step 2: Choose the correct variant for dark theme

   The dark theme is applied by btn-dark. Adding btn-warning alongside it causes conflicting colors.

3. Step 3: Apply large size modifier

   The btn-lg class correctly makes the button large.

4. Final Answer:

   btn btn-dark btn-lg -> Option A

5. Quick Check:

   Use one variant class plus size class [OK]

Hint: Use only one variant class with size class for correct style [OK]

Common Mistakes:

• Combining multiple variant classes causing style conflicts
• Using non-existent combined variant classes
• Forgetting the btn base class