Flex grow and shrink in Tailwind

Introduction

Flex grow and shrink help control how items inside a container get bigger or smaller to fill space nicely.

You want boxes inside a row to share extra space evenly.

You want some items to stay small while others grow bigger.

You want items to shrink if the screen is smaller so nothing breaks.

You want a flexible layout that adjusts on different screen sizes.

Syntax

Tailwind

flex-grow-{number}
flex-shrink-{number}

flex-grow-{number} sets how much an item can grow compared to others.

flex-shrink-{number} sets how much an item can shrink compared to others.

Examples

The first box won't grow, the second box will take extra space.

Tailwind

<div class="flex">
  <div class="flex-grow-0">No grow</div>
  <div class="flex-grow">Grow</div>
</div>

The first box won't get smaller if space is tight, the second box will shrink.

Tailwind

<div class="flex">
  <div class="flex-shrink-0">No shrink</div>
  <div class="flex-shrink">Shrink</div>
</div>

The second box grows twice as much as the first when extra space is available.

Tailwind

<div class="flex">
  <div class="flex-grow-1">Grow 1</div>
  <div class="flex-grow-2">Grow 2</div>
</div>

Sample Program

This page shows two rows. The first row has three boxes: two grow with different rates and one does not grow. The second row has two boxes: one that never shrinks and one that shrinks if space is tight. Resize the browser to see how they behave.

Tailwind

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8" />
  <meta name="viewport" content="width=device-width, initial-scale=1" />
  <title>Flex Grow and Shrink Example</title>
  <script src="https://cdn.tailwindcss.com"></script>
</head>
<body class="p-6">
  <h1 class="text-xl font-bold mb-4">Flex Grow and Shrink Demo</h1>
  <div class="flex border border-gray-400 h-20 mb-6">
    <div class="bg-blue-400 flex-grow text-white flex items-center justify-center">Grow 1</div>
    <div class="bg-green-400 flex-grow-2 text-white flex items-center justify-center">Grow 2</div>
    <div class="bg-red-400 flex-grow-0 text-white flex items-center justify-center">No Grow</div>
  </div>
  <div class="flex border border-gray-400 h-20 max-w-xs overflow-hidden">
    <div class="bg-purple-400 flex-shrink-0 text-white flex items-center justify-center w-40">No Shrink</div>
    <div class="bg-yellow-400 flex-shrink text-black flex items-center justify-center w-40">Shrink</div>
  </div>
</body>
</html>

Important Notes

Use flex-grow-0 to prevent an item from growing.

Use flex-shrink-0 to prevent an item from shrinking.

Tailwind's default flex-grow and flex-shrink classes use 1 as the value.

Summary

Flex grow controls how much an item grows to fill extra space.

Flex shrink controls how much an item shrinks when space is tight.

Tailwind makes it easy to set these with simple classes like flex-grow-1 or flex-shrink-0.

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