Equal-width columns in Bootsrap - Mini Project: Build & Apply

Create a Bootstrap Layout with Equal-width Columns

📖 Scenario: You are building a simple webpage layout using Bootstrap. You want to create a row with three columns that all have the same width, regardless of the content inside them.

🎯 Goal: Build a Bootstrap grid with one row containing three equal-width col columns.

📋 What You'll Learn

Use Bootstrap 5 classes

Create a div with class container as the main wrapper

Inside the container, create a div with class row

Inside the row, create exactly three div elements with class col

Each column should contain some placeholder text like 'Column 1', 'Column 2', and 'Column 3'

💡 Why This Matters

🌍 Real World

Creating equal-width columns is a common task in building responsive web pages, especially for layouts like feature sections, pricing tables, or galleries.

💼 Career

Understanding Bootstrap grid basics is essential for front-end developers and web designers to build clean, responsive layouts quickly.

1

Set up the basic HTML structure with Bootstrap

Create a basic HTML5 document with lang="en". Inside the <head>, add the required meta tags for charset UTF-8 and viewport for responsive design. Also, include the Bootstrap 5 CSS CDN link. In the <body>, add a div with class container to hold your content.

Bootsrap

Hint

Remember to include the Bootstrap CSS link inside the <head> section and add a div with class container inside the body.

2

Add a Bootstrap row inside the container

Inside the existing div with class container, add a div with class row. This will hold the columns.

Bootsrap

    
    
    
    Equal-width Columns


    
        
    

Hint

The row class groups columns horizontally. Add a div with class row inside the container.

3

Add three equal-width columns inside the row

Inside the div with class row, add three div elements each with class col. Inside each column, add the text Column 1, Column 2, and Column 3 respectively.

Bootsrap

    
    
    
    Equal-width Columns


    
        
            
        
    

Hint

Use three div elements with class col inside the row. Add the exact text inside each column.

4

Add a responsive meta tag and a page title

Make sure the <head> section includes a <title> tag with the text Equal-width Columns and the viewport meta tag for responsive design is present.

Bootsrap

    
    


    
        
            Column 1
            Column 2
            Column 3
        
    

Hint

The viewport meta tag helps the page scale on mobile devices. The title appears in the browser tab.

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