Custom breakpoints in Bootsrap - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to define a custom breakpoint named 'xxl' with a minimum width of 1400px in Bootstrap.

Bootsrap

$grid-breakpoints: (
  xs: 0,
  sm: 576px,
  md: 768px,
  lg: 992px,
  xl: 1200px,
  xxl: [1]
);

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

A1300px

B1400px

C1500px

D1600px

Attempts:

3 left

💡 Hint

Common Mistakes

Using a value smaller than 1200px for 'xxl'.

Forgetting to add 'px' unit.

The custom breakpoint 'xxl' is set to 1400px as per the requirement.

2fill in blank

medium

Complete the code to use the custom 'xxl' breakpoint in a media query.

Bootsrap

@media (min-width: [1]) {
  .container {
    max-width: 1400px;
  }
}

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

A1400px

B1200px

C1600px

D992px

Attempts:

3 left

💡 Hint

Common Mistakes

Using the wrong pixel value for the media query.

Using max-width instead of min-width.

The media query uses the 'xxl' breakpoint value of 1400px to apply styles at that width and above.

3fill in blank

hard

Fix the error in the code to correctly extend Bootstrap's grid breakpoints with a new 'xxl' breakpoint.

Bootsrap

$custom-breakpoints: map-merge($grid-breakpoints, (xxl: [1]));

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

A1300px

B1200px

C1400px

D1500px

Attempts:

3 left

💡 Hint

Common Mistakes

Using a value equal to or less than 'xl' breakpoint.

Forgetting to use map-merge to extend breakpoints.

Using '1400px' correctly adds the 'xxl' breakpoint to the existing grid breakpoints.

4fill in blank

hard

Fill both blanks to create a responsive container class that applies max-width at the 'xxl' breakpoint.

Bootsrap

.container-xxl {
  @include media-breakpoint-up([1]) {
    max-width: [2];
  }
}

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

Axxl

B1400px

C1200px

Dlg

Attempts:

3 left

💡 Hint

Common Mistakes

Using the wrong breakpoint name or pixel value.

Mixing breakpoint names with pixel values.

The mixin uses 'xxl' breakpoint and sets max-width to '1400px' for that container.

5fill in blank

hard

Fill all three blanks to define a custom breakpoint map, merge it with Bootstrap's default, and use it in a media query.

Bootsrap

$custom-breakpoints: ([1]: [2]);
$grid-breakpoints: map-merge($grid-breakpoints, $custom-breakpoints);

@media (min-width: [3]) {
  body {
    background-color: lightblue;
  }
}

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

Axxl

B1400px

C1200px

Dlg

Attempts:

3 left

💡 Hint

Common Mistakes

Using inconsistent breakpoint names or values.

Not merging the custom breakpoints properly.

This code defines 'xxl' at 1400px, merges it with default breakpoints, and uses 1400px in the media query.

Practice

1. What is the main purpose of custom breakpoints in Bootstrap?

easy

A. To disable responsive design completely

B. To change the colors of Bootstrap components

C. To add new fonts to the Bootstrap theme

D. To define new screen widths where the layout changes

Solution

1. Step 1: Understand what breakpoints do

   Breakpoints tell Bootstrap when to change layout based on screen size.

2. Step 2: Identify the role of custom breakpoints

   Custom breakpoints let you add or change these screen widths to better fit your design.

3. Final Answer:

   To define new screen widths where the layout changes -> Option D

4. Quick Check:

   Custom breakpoints = new layout widths [OK]

Hint: Breakpoints control layout changes by screen size [OK]

Common Mistakes:

• Thinking breakpoints change colors or fonts
• Confusing breakpoints with disabling responsiveness
• Assuming breakpoints only affect mobile views

2. Which SCSS variable would you modify to add a new custom breakpoint in Bootstrap?

easy

A. $grid-breakpoints

B. $colors

C. $font-family-base

D. $container-max-widths

Solution

1. Step 1: Identify SCSS variables related to breakpoints

   Bootstrap uses $grid-breakpoints to define screen widths for breakpoints.

2. Step 2: Confirm which variable controls breakpoints

   Modifying $grid-breakpoints lets you add or change custom breakpoints.

3. Final Answer:

   $grid-breakpoints -> Option A

4. Quick Check:

   Breakpoint variable = $grid-breakpoints [OK]

Hint: Breakpoints are set in $grid-breakpoints SCSS variable [OK]

Common Mistakes:

• Changing $colors instead of breakpoints
• Modifying font or container width variables
• Trying to add breakpoints in CSS instead of SCSS

3. Given this SCSS snippet, what is the minimum screen width for the custom breakpoint xxl?

$grid-breakpoints: (
  xs: 0,
  sm: 576px,
  md: 768px,
  lg: 992px,
  xl: 1200px,
  xxl: 1400px
);

medium

A. 1200px

B. 1400px

C. 992px

D. 768px

Solution

1. Step 1: Locate the xxl key in the map

   The map shows xxl: 1400px, meaning the breakpoint starts at 1400 pixels.

2. Step 2: Understand breakpoint meaning

   Bootstrap applies styles for xxl at screen widths 1400px and above.

3. Final Answer:

   1400px -> Option B

4. Quick Check:

   xxl breakpoint = 1400px [OK]

Hint: Check the value next to the breakpoint name [OK]

Common Mistakes:

• Confusing breakpoint names with values
• Picking the previous breakpoint's width
• Ignoring the unit (px) in values

4. You added a custom breakpoint xxl at 1400px but your styles for it are not applying. What is the most likely mistake?

medium

A. You forgot to import Bootstrap SCSS after setting the breakpoint

B. You defined xxl inside $colors variable

C. You used @media (min-width: 1400) without units

D. You wrote CSS inside body instead of html

Solution

1. Step 1: Check common syntax errors in media queries

   Media queries require units like px for widths, missing units cause failure.

2. Step 2: Identify the error in the options

   You used @media (min-width: 1400) without units shows @media (min-width: 1400) missing px, so styles won't apply.

3. Final Answer:

   You used @media (min-width: 1400) without units -> Option C

4. Quick Check:

   Media query units required [OK]

Hint: Always include units like px in media queries [OK]

Common Mistakes:

• Forgetting units in media queries
• Not importing Bootstrap SCSS after changes
• Defining breakpoints in wrong variables
• Confusing CSS selectors with media queries

5. You want to add a custom breakpoint at 1600px named xxxl. Which SCSS code correctly adds it and sets container max width for it?

hard

A. $grid-breakpoints: map-merge($grid-breakpoints, (xxxl: 1600px));
$container-max-widths: map-merge($container-max-widths, (xxxl: 1540px));

B. $grid-breakpoints: (xxxl: 1600px);
$container-max-widths: (xxxl: 1540px);

C. $grid-breakpoints: map-merge($colors, (xxxl: 1600px));
$container-max-widths: map-merge($container-max-widths, (xxxl: 1540px));

D. $grid-breakpoints: map-merge($grid-breakpoints, (xxxl: 1600));
$container-max-widths: map-merge($container-max-widths, (xxxl: 1540));

Solution

1. Step 1: Add new breakpoint using map-merge

   Use map-merge to add xxxl: 1600px to existing $grid-breakpoints.

2. Step 2: Set container max width for new breakpoint

   Similarly, add xxxl: 1540px to $container-max-widths using map-merge.

3. Step 3: Check for correct syntax and units

   $grid-breakpoints: map-merge($grid-breakpoints, (xxxl: 1600px)); $container-max-widths: map-merge($container-max-widths, (xxxl: 1540px)); uses correct variables, map-merge, and includes units px.

4. Final Answer:

   Correctly merges new breakpoint and container width with units -> Option A

5. Quick Check:

   Use map-merge with units for custom breakpoints [OK]

Hint: Use map-merge with px units to add breakpoints [OK]

Common Mistakes:

• Overwriting variables instead of merging
• Missing px units in values
• Merging into wrong variables like $colors
• Using incomplete or invalid SCSS syntax