Test your skills: Sizing

The aim of this skill test is to help you assess whether you understand the different ways of sizing items in CSS.

Note: To get help, read our Test your skills usage guide. You can also reach out to us using one of our communication channels.

Task 1

In this task, you have two boxes.

To complete the task:

Size the first box so that the height will be at least 100px, even if there is less content that would cause it to grow to that height. However, the content should not overflow if there is more content than fits in 100 pixels.
Test this box by removing the content from the HTML to make sure you still get a 100px tall box even with no content.
Size the second box so that it is fixed at 100px tall, so that content will overflow if there is too much.

Your final result should look like the image below:

Two boxes one with overflowing content

html

<div class="box box1">
  <p>
    Veggies es bonus vobis, proinde vos postulo essum magis kohlrabi welsh onion
    daikon amaranth tatsoi tomatillo melon azuki bean garlic. Gumbo beet greens
    corn soko endive gumbo gourd.
  </p>
</div>

<div class="box box2">
  <p>
    Veggies es bonus vobis, proinde vos postulo essum magis kohlrabi welsh onion
    daikon amaranth tatsoi tomatillo melon azuki bean garlic. Gumbo beet greens
    corn soko endive gumbo gourd.
  </p>
</div>

css

body {
  font: 1.2em / 1.5 sans-serif;
  padding: 1em;
}

.box {
  border: 5px solid #000;
  width: 400px;
  margin-bottom: 1em;
}

.box1 {
  /* Add styles here */
}

.box2 {
  /* Add styles here */
}

Click here to show the solution

There are two boxes, the first should be given a minimum height, in which case it will expand to take the additional content but if you remove some content, the box will be at least as tall as the min-height. The second is given a fixed height which will cause content to overflow.

css

.box1 {
  min-height: 100px;
}

.box2 {
  height: 100px;
}

Task 2

In this task, you have a box, which contains another box.

To complete the task:

Make the inner box width 60% of the width of the outer box. The value of the box-sizing property is set to border-box, which means that the total width includes any padding and border.
Give the inner box padding of 10% using the width (or inline size) as the size from which that percentage is calculated.

Your final result should look like the image below:

A box with another box nested inside

html

<div class="box">
  <div class="inner">Make me 60% of my parent's width.</div>
</div>

css

body {
  font: 1.2em / 1.5 sans-serif;
  padding: 1em;
}

.box {
  border: 5px solid #000;
  width: 400px;
  margin-bottom: 1em;
}

.inner {
  background-color: rebeccapurple;
  color: white;
  border-radius: 5px;
}

* {
  box-sizing: border-box;
}
.inner {
  /* Add styles here */
}

Click here to show the solution

Make the box 60% of the container and give it 10% of padding on all sides. All elements already have box-sizing: border-box to save you from worrying about which width you are using:

css

* {
  box-sizing: border-box;
}
.inner {
  width: 60%;
  padding: 10%;
}

Task 3

In this task, you have two images in boxes. One image is smaller than the box, the other is larger and breaking out of the box.

To complete the task, imagine that the box is responsive and therefore could grow and shrink. Apply a declaration to the image so that the large image shrinks down into the box but the small image does not stretch.

Your final result should look like the images below:

Two boxes with images in

html

<div class="box">
  <img
    alt="A pink star"
    src="https://mdn.github.io/shared-assets/images/examples/star-pink_256x256.png" />
</div>

<div class="box">
  <img
    alt="Hot air balloons flying in clear sky, and a crowd of people in the foreground"
    src="https://mdn.github.io/shared-assets/images/examples/balloons.jpg" />
</div>

css

body {
  font: 1.2em / 1.5 sans-serif;
  padding: 1em;
}
.box {
  border: 5px solid #000;
  margin-bottom: 1em;
  width: 500px;
}

img {
  /* Add styles here */
}

Click here to show the solution

The example has an image which is breaking out of the box and one which is smaller than the box, you need to use max-width set to 100% to cause the larger image to grow only as large as the box. If you use width: 100%, the small image will stretch.

css

img {
  max-width: 100%;
}