Flex grow and shrink in Tailwind - Mini Project: Build & Apply

Flex Grow and Shrink with Tailwind CSS

📖 Scenario: You are creating a simple responsive card layout for a website. The cards should adjust their size inside a flex container depending on available space. You will use Tailwind CSS flex grow and shrink utilities to control how the cards expand or shrink.

🎯 Goal: Build a flex container with three cards. Use Tailwind CSS classes to make the first card grow to fill extra space, the second card stay fixed size, and the third card shrink if needed.

📋 What You'll Learn

Create a flex container using Tailwind CSS

Add three child div cards inside the container

Use flex-grow and flex-shrink Tailwind classes to control card resizing

Make the first card grow to fill extra space

Make the second card fixed size (no grow or shrink)

Make the third card shrink if space is limited

💡 Why This Matters

🌍 Real World

Flex grow and shrink are used in responsive web layouts to control how elements resize when the browser window changes size.

💼 Career

Understanding flex grow and shrink is essential for front-end developers to build flexible, user-friendly interfaces that adapt to different devices.

1

Create the flex container and three cards

Create a <div> with Tailwind classes flex and border to act as the container. Inside it, add three child <div> elements with Tailwind classes border, p-4, and text content exactly Card 1, Card 2, and Card 3 respectively.

Tailwind

Hint

Use flex on the container to arrange children horizontally. Add borders and padding to cards for visibility.

2

Make the second card fixed size

Add the Tailwind classes w-32 and flex-shrink-0 to the second card's <div> to fix its width to 8rem (128px) and prevent shrinking.

Tailwind

  Card 1
  Card 2 
  Card 3

Hint

Use w-32 and flex-shrink-0 to set a fixed width that doesn't shrink on the second card.

3

Make the first card grow to fill extra space

Add the Tailwind class flex-grow to the first card's <div> so it expands to fill available space in the container.

Tailwind

  Card 1 
  Card 2
  Card 3

Hint

Use flex-grow on the first card to let it expand.

4

Make the third card shrink if needed

Add the Tailwind class flex-shrink to the third card's <div> so it can shrink when the container is too small.

Tailwind

  Card 1
  Card 2
  Card 3 

Hint

Use flex-shrink on the third card to allow it to shrink.

Practice

1. What does the Tailwind class flex-grow-0 do to a flex item?

easy

A. Prevents the item from growing to fill extra space

B. Makes the item grow to fill all extra space

C. Prevents the item from shrinking when space is tight

D. Makes the item shrink faster than others

Solution

1. Step 1: Understand flex-grow property

   The flex-grow property controls how much a flex item can grow relative to others when extra space is available.

2. Step 2: Interpret the class flex-grow-0

   The class flex-grow-0 sets flex-grow to 0, meaning the item will not grow to fill extra space.

3. Final Answer:

   Prevents the item from growing to fill extra space -> Option A

4. Quick Check:

   flex-grow-0 means no growth [OK]

Hint: flex-grow-0 means no growth, flex-grow-1 means grow [OK]

Common Mistakes:

• Confusing grow with shrink
• Thinking flex-grow-0 allows growth
• Mixing flex-grow with flex-shrink

2. Which Tailwind class correctly prevents a flex item from shrinking?

easy

A. flex-grow-1

B. flex-grow-0

C. flex-shrink-1

D. flex-shrink-0

Solution

1. Step 1: Understand flex-shrink property

   The flex-shrink property controls how much a flex item shrinks when space is limited.

2. Step 2: Identify the class that disables shrinking

   The class flex-shrink-0 sets flex-shrink to 0, preventing the item from shrinking.

3. Final Answer:

   flex-shrink-0 -> Option D

4. Quick Check:

   flex-shrink-0 means no shrinking [OK]

Hint: Use flex-shrink-0 to stop shrinking, flex-shrink-1 to allow [OK]

Common Mistakes:

• Choosing flex-grow classes instead of flex-shrink
• Assuming flex-shrink-1 prevents shrinking
• Mixing grow and shrink properties

3. Given this HTML snippet:

<div class="flex w-64">
  <div class="flex-grow-0 w-16 bg-blue-500">A</div>
  <div class="flex-grow w-32 bg-red-500">B</div>
</div>

What will happen to the widths of the two divs inside the flex container?

medium

A. A shrinks, B stays fixed at 32 width

B. A stays 16 width, B grows to fill remaining space

C. Both A and B grow equally to fill space

D. A grows, B shrinks to 16 width

Solution

1. Step 1: Analyze flex-grow classes

   Div A has flex-grow-0 so it won't grow beyond its width 16. Div B has flex-grow (equivalent to flex-grow-1) so it will grow to fill leftover space.

2. Step 2: Understand container width and item widths

   The container is 64 width. A uses 16 width fixed, B starts at 32 but grows to fill remaining space (64 - 16 = 48 or more if allowed).

3. Final Answer:

   A stays 16 width, B grows to fill remaining space -> Option B

4. Quick Check:

   flex-grow-0 no grow, flex-grow fills space [OK]

Hint: flex-grow-0 fixes size, flex-grow fills leftover space [OK]

Common Mistakes:

• Assuming flex-grow-0 items grow
• Thinking both grow equally without flex-grow class
• Ignoring container width limits

4. You have this code:

<div class="flex w-40">
  <div class="flex-shrink-0 w-24 bg-green-400">X</div>
  <div class="flex-shrink w-24 bg-yellow-400">Y</div>
</div>

But the second div overflows the container. What is the problem?

medium

A. flex-shrink on second div prevents shrinking, causing overflow

B. w-24 is too small for both divs, causing overflow

C. flex-shrink-0 on first div prevents it from shrinking, causing overflow

D. Missing flex-grow classes causes overflow

Solution

1. Step 1: Check widths and container size

   Container width is 40. Both divs have width 24, total 48, which is more than container.

2. Step 2: Analyze flex-shrink classes

   First div has flex-shrink-0, so it cannot shrink below 24. Second div has default shrink, so it tries to shrink but can't reduce enough to fit container.

3. Final Answer:

   flex-shrink-0 on first div prevents it from shrinking, causing overflow -> Option C

4. Quick Check:

   flex-shrink-0 stops shrinking, causes overflow [OK]

Hint: flex-shrink-0 stops shrinking, watch container overflow [OK]

Common Mistakes:

• Thinking flex-shrink on second div causes overflow
• Ignoring container width limits
• Assuming flex-grow affects shrinking

5. You want three flex items inside a container to share leftover space proportionally: the first twice as much as the second, and the third does not grow. Which Tailwind classes should you use?

hard

A. First: flex-grow-2, Second: flex-grow-1, Third: flex-grow-0

B. First: flex-grow, Second: flex-grow-2, Third: flex-grow-0

C. First: flex-grow-1, Second: flex-grow-2, Third: flex-grow-0

D. First: flex-grow-0, Second: flex-grow-1, Third: flex-grow-2

Solution

1. Step 1: Understand proportional growth with flex-grow

   Flex-grow values determine how leftover space is divided. A value of 2 means twice the space compared to 1.

2. Step 2: Assign classes to match proportions

   First item needs flex-grow-2, second flex-grow-1, third flex-grow-0 to not grow.

3. Final Answer:

   First: flex-grow-2, Second: flex-grow-1, Third: flex-grow-0 -> Option A

4. Quick Check:

   flex-grow values set proportional growth [OK]

Hint: Use flex-grow numbers to set proportional growth [OK]

Common Mistakes:

• Using wrong grow numbers or order
• Assigning flex-grow-0 to growing items
• Confusing grow with shrink classes