Overflow property in CSS - Mini Project: Build & Apply

Using the CSS Overflow Property

📖 Scenario: You are creating a simple webpage section that contains a box with text that is too long to fit inside the box. You want to control how the extra text is handled so the box looks neat.

🎯 Goal: Build a webpage with a box that has a fixed size and uses the CSS overflow property to control how extra content is shown or hidden.

📋 What You'll Learn

Create a div with a fixed width and height

Add enough text inside the div so it overflows

Create a CSS variable called overflowStyle to hold the overflow setting

Use the overflowStyle variable to set the overflow property on the div

Change the overflow style to see different effects like hidden, scroll, or auto

💡 Why This Matters

🌍 Real World

Controlling overflow is important when designing web layouts to keep content tidy and user-friendly, especially on small screens or fixed-size containers.

💼 Career

Web developers often use the overflow property to manage content display, prevent layout breaks, and improve user experience.

1

Create the HTML structure with a fixed size box

Create a div element with the class box. Inside it, add the text: This is some long text that will not fit inside the box and will overflow.. In your CSS, set the .box class to have a width of 200px and a height of 100px.

CSS

Need a hint?

Use a div with class box and set its width and height in CSS.

2

Add a CSS variable for the overflow style

In the CSS inside the style tag, create a CSS variable called --overflowStyle on the :root selector and set its value to hidden.

CSS

:root {
  /* Define the overflow style variable here */
}
.box {
  width: 200px;
  height: 100px;
  border: 1px solid black;
}

Need a hint?

Use :root { --overflowStyle: hidden; } to create the variable.

3

Use the CSS variable to set the overflow property

In the CSS for the .box class, add the overflow property and set it to use the CSS variable --overflowStyle with the syntax overflow: var(--overflowStyle);.

CSS

:root {
  --overflowStyle: hidden;
}
.box {
  width: 200px;
  height: 100px;
  border: 1px solid black;
  /* Add overflow property using the variable here */
}

Need a hint?

Use overflow: var(--overflowStyle); inside the .box CSS.

4

Change the overflow style to see different effects

Change the value of the CSS variable --overflowStyle inside the :root selector from hidden to scroll. This will add scrollbars to the box when content overflows.

CSS

:root {
  /* Change the overflow style variable value here to 'scroll' */
}
.box {
  width: 200px;
  height: 100px;
  border: 1px solid black;
  overflow: var(--overflowStyle);
}

Need a hint?

Change --overflowStyle value to scroll to add scrollbars.