Hidden, scroll, auto in CSS - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to hide overflow content in a box.

CSS

div {
  overflow: [1];
  width: 10rem;
  height: 5rem;
  border: 1px solid black;
}

Drag options to blanks, or click blank then click option'

Ahidden

Bauto

Cvisible

Dscroll

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'visible' which shows overflow content.

Using 'scroll' which adds scrollbars instead of hiding.

The hidden value hides any content that goes outside the box.

2fill in blank

medium

Complete the code to add scrollbars when content overflows.

CSS

div {
  overflow: [1];
  width: 8rem;
  height: 4rem;
  border: 1px solid black;
}

Drag options to blanks, or click blank then click option'

Ahidden

Bscroll

Cvisible

Dauto

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'auto' which shows scrollbars only if needed.

Using 'hidden' which hides overflow content.

The scroll value always shows scrollbars, allowing scrolling.

3fill in blank

hard

Fix the error in the code to show scrollbars only when needed.

CSS

div {
  overflow: [1];
  width: 12rem;
  height: 6rem;
  border: 1px solid black;
}

Drag options to blanks, or click blank then click option'

Aauto

Bscroll

Chidden

Dvisible

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'scroll' which always shows scrollbars.

Using 'hidden' which hides overflow content.

The auto value shows scrollbars only if the content is bigger than the box.

4fill in blank

hard

Fill both blanks to hide horizontal overflow but allow vertical scrolling.

CSS

div {
  overflow-x: [1];
  overflow-y: [2];
  width: 10rem;
  height: 5rem;
  border: 1px solid black;
}

Drag options to blanks, or click blank then click option'

Ahidden

Bscroll

Cauto

Dvisible

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'scroll' for horizontal overflow which shows scrollbars unnecessarily.

Using 'visible' which does not hide overflow.

Setting overflow-x to hidden hides horizontal overflow.
Setting overflow-y to auto shows vertical scrollbars only if needed.

5fill in blank

hard

Fill all three blanks to always show horizontal scrollbars, show vertical scrollbars only when needed.

CSS

div {
  overflow: [3];
  overflow-x: [1];
  overflow-y: [2];
  width: 15rem;
  height: 7rem;
  border: 1px solid black;
}

Drag options to blanks, or click blank then click option'

Ahidden

Bscroll

Cauto

Dvisible

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'auto' for horizontal which shows scrollbars only when needed.

Using 'scroll' for vertical which always shows vertical scrollbars.

Using 'hidden' which clips overflow content.

overflow: visible; first sets both directions to visible.
overflow-x: scroll; always shows horizontal scrollbars.
overflow-y: auto; shows vertical scrollbars only if needed.

Practice

1. What does the CSS property overflow: hidden; do to extra content that doesn't fit in a container?

easy

A. It always shows scrollbars to access extra content.

B. It enlarges the container to fit all content.

C. It shows scrollbars only if the content overflows.

D. It hides the extra content without showing scrollbars.

Solution

1. Step 1: Understand overflow: hidden; behavior

   This property hides any content that goes beyond the container's size without showing scrollbars.

2. Step 2: Compare with other overflow values

   Unlike scroll or auto, it does not provide any way to scroll to hidden content.

3. Final Answer:

   It hides the extra content without showing scrollbars. -> Option D

4. Quick Check:

   hidden hides overflow [OK]

Hint: Hidden means no scrollbars, just cut off content [OK]

Common Mistakes:

• Thinking hidden shows scrollbars
• Confusing hidden with auto
• Assuming content resizes container

2. Which of the following is the correct CSS syntax to always show scrollbars on overflow?

easy

A. overflow: auto;

B. overflow: scroll;

C. overflow: hidden;

D. overflow: visible;

Solution

1. Step 1: Recall CSS overflow values

   scroll always shows scrollbars regardless of content size.

2. Step 2: Verify syntax correctness

   The syntax overflow: scroll; is valid and forces scrollbars.

3. Final Answer:

   overflow: scroll; -> Option B

4. Quick Check:

   scroll always shows scrollbars [OK]

Hint: Scroll means scrollbars always visible [OK]

Common Mistakes:

• Using auto instead of scroll
• Confusing hidden with scroll
• Writing invalid property names

3. Given this CSS and HTML:

div {
  width: 100px;
  height: 100px;
  overflow: auto;
  border: 1px solid black;
}

This is a very long text that will overflow the box and may require scrolling.

What will the user see in the browser?

medium

A. No scrollbars, content is cut off.

B. Scrollbars always visible even if not needed.

C. Scrollbars appear only if content overflows.

D. Content expands container size to fit all text.

Solution

1. Step 1: Understand overflow: auto; behavior

   This value shows scrollbars only when content is bigger than the container.

2. Step 2: Analyze the content size

   The text is longer than 100px width and height, so scrollbars will appear.

3. Final Answer:

   Scrollbars appear only if content overflows. -> Option C

4. Quick Check:

   auto shows scrollbars if needed [OK]

Hint: Auto means scrollbars only if content is too big [OK]

Common Mistakes:

• Thinking auto always shows scrollbars
• Assuming content resizes container
• Confusing auto with hidden

4. You want to hide overflow content but accidentally wrote overflow: auto hidden; in your CSS. What will happen?

medium

A. The first value auto sets horizontal overflow, hidden sets vertical overflow.

B. The browser will ignore the entire overflow property.

C. The browser will show scrollbars always.

D. The CSS will cause a syntax error and not apply.

Solution

1. Step 1: Understand CSS overflow shorthand

   overflow can take one or two values: first for horizontal, second for vertical overflow.

2. Step 2: Analyze two-value syntax

   auto hidden is valid shorthand: horizontal = auto, vertical = hidden.

3. Final Answer:

   The first value auto sets horizontal overflow, hidden sets vertical overflow. -> Option A

4. Quick Check:

   Two-value overflow sets horizontal and vertical separately [OK]

Hint: Two values set horizontal and vertical overflow separately [OK]

Common Mistakes:

• Thinking invalid syntax causes error
• Assuming both values apply as one
• Ignoring two-value overflow shorthand

5. You have a container with fixed width and height. You want to ensure that if content overflows horizontally, a scrollbar appears, but vertically overflow content is hidden without scrollbars. Which CSS is correct?

hard

A. overflow-x: scroll; overflow-y: hidden;

B. overflow-x: hidden; overflow-y: scroll;

C. overflow: scroll;

D. overflow: auto;

Solution

1. Step 1: Identify horizontal and vertical overflow needs

   Horizontal overflow needs scrollbars, vertical overflow should hide content.

2. Step 2: Use directional overflow properties

   overflow-x: scroll; forces horizontal scrollbars, overflow-y: hidden; hides vertical overflow.

3. Step 3: Check other options

   overflow: scroll; shows scrollbars both directions; overflow: auto; shows scrollbars only if needed both directions; overflow-x: hidden; overflow-y: scroll; reverses the requirement.

4. Final Answer:

   overflow-x: scroll; overflow-y: hidden; -> Option A

5. Quick Check:

   Directional overflow controls scrollbars separately [OK]

Hint: Use overflow-x and overflow-y for separate scroll control [OK]

Common Mistakes:

• Using single overflow property for different directions
• Confusing scroll and auto
• Forgetting to hide vertical overflow