Object fit in CSS - Mini Project: Build & Apply

Using CSS Object Fit to Control Image Display

📖 Scenario: You are creating a simple webpage that shows a profile picture inside a fixed-size box. The image might have different sizes and shapes, so you want to control how it fits inside the box without stretching or cutting off important parts.

🎯 Goal: Build a webpage with a fixed-size image container and use the CSS object-fit property to make the image fit nicely inside the container.

📋 What You'll Learn

Create an HTML structure with a container and an image inside it.

Set the container size to 200px by 200px.

Use CSS to apply object-fit property to the image.

Try different object-fit values: cover, contain, and fill.

Make sure the image is responsive and accessible.

💡 Why This Matters

🌍 Real World

Websites often need to display images of different sizes inside fixed spaces without distortion. Using object-fit helps keep images looking good and consistent.

💼 Career

Front-end developers use CSS object-fit to create visually appealing and accessible image layouts in real projects.

1

Create the HTML structure with a container and an image

Write the HTML code to create a <div> with class image-container and inside it place an <img> tag with src="https://via.placeholder.com/300x150" and alt="Profile picture".

CSS

Hint

Use a <div> with class image-container and inside it add an <img> tag with the exact src and alt attributes.

2

Set the container size with CSS

Add CSS to set the .image-container class width and height to 200px each, and add a border of 2px solid black to see the container edges.

CSS

.image-container {
  /* Set width and height to 200px */
  /* Add a 2px solid black border */
}



  

Hint

Use CSS properties width, height, and border inside the .image-container selector.

3

Apply object-fit: cover to the image

Add CSS to the img inside .image-container to set its width and height to 100% and apply object-fit: cover; so the image covers the container without distortion.

CSS

.image-container {
  width: 200px;
  height: 200px;
  border: 2px solid black;
}
.image-container img {
  /* Set width and height to 100% */
  /* Add object-fit: cover */
}



  

Hint

Inside the .image-container img selector, set width and height to 100% and add object-fit: cover;.

4

Try object-fit: contain and add accessibility improvements

Change the object-fit property value to contain in the CSS for the image. Also, add aria-label="Profile picture container" to the div with class image-container for accessibility.

CSS

.image-container {
  width: 200px;
  height: 200px;
  border: 2px solid black;
}
.image-container img {
  width: 100%;
  height: 100%;
  /* Change object-fit to contain */
}



  

Hint

Change object-fit to contain and add aria-label="Profile picture container" to the div with class image-container.

Practice

1. What does the CSS property object-fit: cover; do to an image inside a container?

easy

A. It fits the entire image inside the container without cropping.

B. It stretches the image to fill the container, possibly distorting it.

C. It fills the container completely, cropping parts if needed.

D. It repeats the image to fill the container.

Solution

1. Step 1: Understand object-fit: cover; behavior

   This property makes the image fill the container completely, cropping parts if the aspect ratio differs.

2. Step 2: Compare with other options

   Unlike contain which fits without cropping, cover crops to fill fully.

3. Final Answer:

   It fills the container completely, cropping parts if needed. -> Option C

4. Quick Check:

   Cover = fill and crop [OK]

Hint: Cover fills and crops; contain fits without cropping [OK]

Common Mistakes:

• Confusing cover with contain
• Thinking cover stretches without cropping
• Assuming cover repeats the image

2. Which of the following is the correct CSS syntax to make an image fit inside its container without cropping or distortion?

easy

A. object-fit: stretch;

B. object-fit: fill;

C. object-fit: crop;

D. object-fit: contain;

Solution

1. Step 1: Identify the property for fitting without cropping

   object-fit: contain; fits the entire image inside the container without cropping or distortion.

2. Step 2: Check other options

   fill stretches, stretch is invalid, and crop is not a valid value.

3. Final Answer:

   object-fit: contain; -> Option D

4. Quick Check:

   Contain = fit inside without cropping [OK]

Hint: Contain fits fully inside; fill stretches [OK]

Common Mistakes:

• Using invalid value 'stretch'
• Confusing fill with contain
• Thinking crop is a valid value

3. Given this HTML and CSS, what will the image look like in the browser?

<div style="width: 200px; height: 100px;">
  <img src="image.jpg" style="width: 100%; height: 100%; object-fit: contain;">
</div>

medium

A. The entire image fits inside the container without cropping, possibly leaving empty space.

B. The image fills the container and may be cropped.

C. The image stretches and distorts to fill the container.

D. The image repeats to fill the container.

Solution

1. Step 1: Analyze the container and image size

   The container is 200px wide and 100px tall. The image is set to 100% width and height of the container.

2. Step 2: Understand object-fit: contain; effect

   This makes the image scale to fit inside the container fully without cropping or distortion, preserving aspect ratio. Empty space may appear if aspect ratios differ.

3. Final Answer:

   The entire image fits inside the container without cropping, possibly leaving empty space. -> Option A

4. Quick Check:

   Contain = fit inside with possible empty space [OK]

Hint: Contain fits fully, may leave space; cover crops [OK]

Common Mistakes:

• Assuming image will crop with contain
• Thinking image will distort with contain
• Confusing contain with fill

4. You want an image to fill its container without distortion, but it currently stretches oddly. Which CSS fix will solve this?

img {
  width: 100%;
  height: 100%;
  object-fit: fill;
}

medium

A. Change object-fit to cover.

B. Remove width and height properties.

C. Change object-fit to contain.

D. Add object-position: center;.

Solution

1. Step 1: Identify the problem with object-fit: fill;

   This stretches the image to fill container width and height, causing distortion.

2. Step 2: Use object-fit: cover; to fix distortion

   cover fills the container while preserving aspect ratio, cropping if needed, preventing distortion.

3. Final Answer:

   Change object-fit to cover. -> Option A

4. Quick Check:

   Cover fills without distortion by cropping [OK]

Hint: Use cover to fill without distortion, fill stretches [OK]

Common Mistakes:

• Using fill causes distortion
• Removing width/height breaks layout
• Thinking object-position fixes distortion

5. You have a video inside a 400px by 300px container. You want the video to fill the container fully without distortion, but keep the center visible if cropping happens. Which CSS is best?

video {
  width: 100%;
  height: 100%;
  object-fit: ?
  object-position: ?
}

hard

A. object-fit: fill; and object-position: left;

B. object-fit: cover; and object-position: center;

C. object-fit: contain; and object-position: top;

D. object-fit: none; and object-position: center;

Solution

1. Step 1: Choose object-fit to fill without distortion

   cover fills the container fully, preserving aspect ratio, cropping if needed.

2. Step 2: Set object-position to keep center visible

   object-position: center; ensures cropping keeps the center area visible.

3. Final Answer:

   object-fit: cover; and object-position: center; -> Option B

4. Quick Check:

   Cover + center = fill fully, crop center visible [OK]

Hint: Cover fills and crops; center keeps main part visible [OK]

Common Mistakes:

• Using contain leaves empty space
• Using fill distorts video
• Ignoring object-position for cropping focus