Grid vs flexbox in CSS - Interactive Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to make the container use Flexbox layout.

CSS

.container {
  display: [1];
}

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

Aflex

Bblock

Cgrid

Dinline

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'block' instead of 'flex' does not create a flex container.

Using 'grid' creates a grid layout, not flexbox.

The display: flex; property makes the container use Flexbox layout.

2fill in blank

medium

Complete the code to make the container use Grid layout.

CSS

.container {
  display: [1];
}

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

Ainline

Bflex

Cgrid

Dblock

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'flex' creates a flex container, not a grid.

Using 'block' or 'inline' does not create grid layout.

The display: grid; property makes the container use Grid layout.

3fill in blank

hard

Fix the error in the code to create a 3-column grid layout.

CSS

.container {
  display: grid;
  grid-template-columns: repeat([1], 1fr);
}

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

A3

Btwo

Cfour

D5

Attempts:

3 left

💡 Hint

Common Mistakes

Using words like 'two' or 'four' instead of numbers causes errors.

Using numbers other than 3 will create a different number of columns.

The repeat(3, 1fr) creates 3 equal columns in the grid.

4fill in blank

hard

Fill both blanks to create a flex container that centers items horizontally and vertically.

CSS

.container {
  display: [1];
  justify-content: [2];
  align-items: center;
}

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

Aflex

Bcenter

Cspace-between

Dgrid

Attempts:

3 left

💡 Hint

Common Mistakes

Using display: grid; instead of flexbox.

Using justify-content: space-between; which spreads items apart.

Use display: flex; to create a flex container and justify-content: center; to center items horizontally.

5fill in blank

hard

Fill all three blanks to create a grid container with 2 rows and 3 columns.

CSS

.container {
  display: [1];
  grid-template-columns: repeat([2], 1fr);
  grid-template-rows: repeat([3], 100px);
}

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

Aflex

B3

C2

Dgrid

Attempts:

3 left

💡 Hint

Common Mistakes

Using display: flex; instead of grid.

Swapping the numbers for rows and columns.

Use display: grid; to create a grid container with 3 columns and 2 rows.

Practice

1. Which CSS layout method is best for arranging items in both rows and columns simultaneously?

easy

A. Flexbox

B. Grid

C. Float

D. Position absolute

Solution

1. Step 1: Understand layout capabilities

   Flexbox arranges items in one direction: row or column, but not both at once.

2. Step 2: Identify the method for two-dimensional layout

   Grid allows arranging items in rows and columns simultaneously, making it suitable for complex layouts.

3. Final Answer:

   Grid -> Option B

4. Quick Check:

   Two-dimensional layout = Grid [OK]

Hint: Grid = rows + columns; Flexbox = single row or column [OK]

Common Mistakes:

• Thinking Flexbox can handle rows and columns at the same time
• Confusing float with layout methods
• Assuming position absolute arranges items in grid

2. Which of the following is the correct CSS syntax to create a flex container?

easy

A. display: grid;

B. flex-container: true;

C. flex-direction: grid;

D. display: flex;

Solution

1. Step 1: Identify the property to create flex container

   The CSS property to create a flex container is display: flex;.

2. Step 2: Check other options for correctness

   display: grid; creates a grid container, not flex. flex-direction: grid; is invalid. flex-container: true; is not a valid CSS property.

3. Final Answer:

   display: flex; -> Option D

4. Quick Check:

   Flex container syntax = display: flex [OK]

Hint: Flex container always uses display: flex [OK]

Common Mistakes:

• Using display: grid instead of flex
• Trying to set flex-direction to grid
• Using non-existent CSS properties

3. Given the CSS below, what will be the layout of the items inside .container?

.container {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}
.item {
  width: 100px;
  height: 50px;
  background-color: lightblue;
}

medium

A. Items arranged horizontally with 1rem gap

B. Items arranged in a grid with 1rem gap

C. Items arranged vertically with 1rem gap

D. Items stacked with no gap

Solution

1. Step 1: Analyze flex container properties

   The container uses display: flex; and flex-direction: column;, so items stack vertically.

2. Step 2: Understand gap effect

   The gap: 1rem; adds space between items vertically in column direction.

3. Final Answer:

   Items arranged vertically with 1rem gap -> Option C

4. Quick Check:

   flex-direction: column + gap = vertical spacing [OK]

Hint: flex-direction: column stacks items vertically [OK]

Common Mistakes:

• Assuming flex defaults to row direction
• Ignoring the gap property
• Thinking items form a grid with flex

4. Identify the error in this CSS code if the goal is to create a 3-column grid layout:

.grid-container {
  display: flex;
  grid-template-columns: repeat(3, 1fr);
}

medium

A. Using flex display with grid-template-columns property

B. Missing grid-gap property

C. Incorrect repeat syntax in grid-template-columns

D. Missing width on container

Solution

1. Step 1: Check display property

   The container uses display: flex;, which does not support grid-template-columns.

2. Step 2: Understand property compatibility

   grid-template-columns works only with display: grid;. Mixing flex display with grid properties causes no effect or errors.

3. Final Answer:

   Using flex display with grid-template-columns property -> Option A

4. Quick Check:

   grid-template-columns requires display: grid [OK]

Hint: Grid properties need display: grid, not flex [OK]

Common Mistakes:

• Mixing flex display with grid properties
• Assuming repeat syntax is wrong
• Forgetting to set display property

5. You want to create a responsive photo gallery with rows and columns that adjust automatically. Which CSS approach is best and why? A developer tries this CSS:

.gallery {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
}
.photo {
  flex: 1 1 200px;
  height: 150px;
}

Why might CSS Grid be a better choice here?

hard

A. Grid allows explicit control of rows and columns, making layout predictable and consistent.

B. Flexbox automatically creates rows and columns without extra code.

C. Grid requires less CSS code than flexbox for any layout.

D. Flexbox does not support gaps between items.

Solution

1. Step 1: Analyze flexbox gallery approach

   Flexbox with wrapping creates rows but columns depend on item size and wrapping, which can be uneven and unpredictable.

2. Step 2: Compare with grid advantages

   Grid lets you define explicit rows and columns, so the gallery layout is consistent and easier to control across screen sizes.

3. Final Answer:

   Grid allows explicit control of rows and columns, making layout predictable and consistent. -> Option A

4. Quick Check:

   Responsive rows + columns = Grid best choice [OK]

Hint: Use Grid for predictable rows and columns in galleries [OK]

Common Mistakes:

• Assuming flex-wrap creates perfect grid layouts
• Thinking Grid always uses less CSS
• Believing flexbox cannot have gaps