Equal-width columns in Bootsrap

Introduction

Equal-width columns help you divide space evenly on a webpage. This makes your layout look neat and balanced.

You want to show multiple items side by side with the same width.

You need a simple grid layout without specifying exact sizes.

You want your columns to adjust automatically on different screen sizes.

You want to create a navigation bar with evenly spaced links.

You want to display product features in equal boxes.

Syntax

Bootsrap

<div class="row">
  <div class="col">Column 1</div>
  <div class="col">Column 2</div>
  <div class="col">Column 3</div>
</div>

Use col class inside a row to create equal-width columns.

You can add as many col divs as you want; they will share space equally.

Examples

Three equal columns sharing the row space evenly.

Bootsrap

<div class="row">
  <div class="col">One</div>
  <div class="col">Two</div>
  <div class="col">Three</div>
</div>

Two equal columns side by side.

Bootsrap

<div class="row">
  <div class="col">Left</div>
  <div class="col">Right</div>
</div>

Four equal columns filling the row.

Bootsrap

<div class="row">
  <div class="col">A</div>
  <div class="col">B</div>
  <div class="col">C</div>
  <div class="col">D</div>
</div>

Sample Program

This example shows three equal-width columns inside a row. Each column has a different background color and centered text. The columns share the space evenly across the container.

Bootsrap

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8" />
  <meta name="viewport" content="width=device-width, initial-scale=1" />
  <title>Equal-width Columns Example</title>
  <link href="https://cdn.jsdelivr.net/npm/bootstrap@5.3.0/dist/css/bootstrap.min.css" rel="stylesheet" />
</head>
<body>
  <main class="container mt-4">
    <h1>Equal-width Columns</h1>
    <div class="row border p-3">
      <div class="col bg-primary text-white text-center p-3">Column 1</div>
      <div class="col bg-success text-white text-center p-3">Column 2</div>
      <div class="col bg-warning text-dark text-center p-3">Column 3</div>
    </div>
  </main>
</body>
</html>

Important Notes

Equal-width columns automatically adjust their size to fill the row evenly.

On smaller screens, columns stack vertically by default for better readability.

You can add padding and background colors to columns to make them visually distinct.

Summary

Use col inside a row to create equal-width columns easily.

Columns share space evenly without needing to specify widths.

Bootstrap handles responsiveness so columns stack on small screens.

Practice

1. What does using class="col" inside a row in Bootstrap do?

easy

A. Creates columns with fixed pixel widths

B. Creates columns that are always stacked vertically

C. Creates columns that share the row's width equally

D. Creates columns that ignore the row container

Solution

1. Step 1: Understand Bootstrap's grid system

   Bootstrap uses rows and columns to create layouts. The col class means the column will share space equally with other col siblings.

2. Step 2: Effect of col inside a row

   When multiple col classes are inside a row, they automatically divide the row's width evenly.

3. Final Answer:

   Creates columns that share the row's width equally -> Option C

4. Quick Check:

   Equal-width columns = col inside row [OK]

Hint: Remember: col means equal width columns [OK]

Common Mistakes:

• Thinking col sets fixed pixel widths
• Assuming columns always stack vertically
• Believing columns ignore the row container

2. Which of the following is the correct syntax to create three equal-width columns in Bootstrap?

easy

A.

B.

C.

D.

Solution

1. Step 1: Identify the container for columns

   Bootstrap columns must be inside a row to work properly.

2. Step 2: Check column classes for equal width

   Using col without a number creates equal-width columns automatically.

3. Final Answer:

   <div class="row"><div class="col"></div><div class="col"></div><div class="col"></div></div> -> Option A

4. Quick Check:

   Equal-width columns need col inside row [OK]

Hint: Use col inside row for equal widths [OK]

Common Mistakes:

• Using col outside a row
• Using fixed width classes like col-4 for equal widths
• Not wrapping columns in a row

3. What will be the visual result of this code?

<div class="row">
  <div class="col">A</div>
  <div class="col">B</div>
  <div class="col">C</div>
</div>

medium

A. Three columns with different widths depending on content

B. Three stacked rows labeled A, B, and C

C. One column with A, B, and C stacked vertically

D. Three columns of equal width side by side labeled A, B, and C

Solution

1. Step 1: Analyze the use of col classes inside row

   Each col inside a row creates a column that shares the row's width equally.

2. Step 2: Predict the layout

   The three columns labeled A, B, and C will appear side by side with equal widths.

3. Final Answer:

   Three columns of equal width side by side labeled A, B, and C -> Option D

4. Quick Check:

   Equal-width columns render side by side [OK]

Hint: Equal col inside row means side-by-side equal columns [OK]

Common Mistakes:

• Thinking columns stack vertically by default
• Assuming columns size by content width
• Confusing col with fixed width classes

4. Identify the error in this Bootstrap code for equal-width columns:

<div class="container">
  <div class="col">One</div>
  <div class="col">Two</div>
</div>

medium

A. Missing row container around the columns

B. Using container instead of row

C. Columns should have fixed width classes like col-6

D. No error, code is correct

Solution

1. Step 1: Check Bootstrap structure rules

   Columns (col) must be inside a row to work properly.

2. Step 2: Identify missing row

   The code has container but no row wrapping the columns, so columns won't behave as expected.

3. Final Answer:

   Missing row container around the columns -> Option A

4. Quick Check:

   Columns need row wrapper [OK]

Hint: Always wrap col inside row [OK]

Common Mistakes:

• Skipping the row wrapper
• Confusing container with row
• Thinking fixed width classes are required for equal columns

5. You want to create four equal-width columns that stack vertically on small screens but appear side by side on medium and larger screens. Which Bootstrap classes should you use?

hard

A. col inside a container

B. col-md inside a row

C. col-sm inside a row

D. col-lg inside a container

Solution

1. Step 1: Understand responsive column classes

   Bootstrap uses breakpoint prefixes like col-md to apply column widths starting at medium screen sizes.

2. Step 2: Choose classes for stacking on small and equal width on medium+

   Using col-md inside a row means columns stack vertically on small screens and become equal-width side by side on medium and larger screens.

3. Final Answer:

   col-md inside a row -> Option B

4. Quick Check:

   Use col-md for medium+ equal columns, stack below [OK]

Hint: Use breakpoint classes like col-md for responsive equal columns [OK]

Common Mistakes:

• Using col without breakpoint for responsive stacking
• Not wrapping columns in a row
• Using container instead of row for columns