Position relative in CSS - Practice Problems & Coding Challenges

Challenge - 5 Problems

🧠 Conceptual

intermediate

Understanding position: relative effect on layout

What happens to the space originally occupied by an element when you apply position: relative and move it using top or left properties?

A The element moves visually, but the original space it occupied remains reserved in the layout.

B The element moves and the layout adjusts, removing the original space it occupied.

C The element stays in place and only its content moves inside it.

D The element disappears from the layout and only appears where moved.

💡 Hint

Think about whether the element's original spot is still counted by other elements.

When an element is position: relative, it moves visually but the space it originally took up in the page layout remains reserved. This means other elements behave as if it did not move.

📝 Syntax

intermediate

Which CSS snippet correctly moves an element 20px down and 10px right using position relative?

Choose the CSS code that correctly moves an element 20px down and 10px right using position: relative.

A position: relative; bottom: 20px; right: 10px;

B position: relative; top: 20px; left: 10px;

C position: relative; top: -20px; left: -10px;

D position: absolute; top: 20px; left: 10px;

💡 Hint

Positive top moves down, positive left moves right.

With position: relative, top: 20px moves the element 20px down, and left: 10px moves it 10px right.

❓ rendering

advanced

Visual result of relative positioning with negative values

Given this CSS, what will you see in the browser?

.box { position: relative; top: -15px; left: -30px; width: 100px; height: 100px; background-color: blue; }

A No blue box appears because negative values are invalid.

B A blue box shifted 15px down and 30px right, overlapping other content.

C A blue box shifted 15px up and 30px left from its original position, with original space still reserved.

D A blue box stays in place but its content moves inside it.

💡 Hint

Negative top moves up, negative left moves left.

Negative top moves the element up, negative left moves it left. The original space remains reserved because of position: relative.

❓ selector

advanced

Which CSS selector targets only elements with position relative?

Which CSS selector correctly selects all elements that have position: relative applied?

A *[style*='position: relative']

B :is([style*='position: relative'])

C :where([style*='position: relative'])

D There is no pure CSS selector to select elements by computed style.

💡 Hint

Think about how CSS selectors work versus styles applied in CSS or inline.

CSS selectors cannot select elements based on computed styles like position. They only select by tag, class, id, attributes, or pseudo-classes.

❓ accessibility

expert

Accessibility impact of using position: relative with large offsets

What is a potential accessibility concern when using position: relative with large top or left offsets to move content visually?

A Screen readers may read content in the original order, causing confusion if visual order differs.

B Keyboard navigation will automatically follow the visual position of elements.

C Users with color blindness will not see the moved content.

D There is no accessibility concern because relative positioning does not affect content order.

💡 Hint

Think about how assistive technologies read content versus how it looks visually.

Using position: relative to move content visually does not change the DOM order. Screen readers and keyboard navigation follow the DOM order, which can differ from visual order, causing confusion.

Practice

1. What does position: relative; do to an HTML element?

easy

A. Positions the element absolutely at the top-left corner of the page.

B. Removes the element from the page flow completely.

C. Fixes the element to the viewport so it doesn't move when scrolling.

D. Moves the element relative to its normal position without affecting other elements.

Solution

1. Step 1: Understand position relative behavior

   Position relative moves the element from where it normally is but keeps its space reserved in the layout.

2. Step 2: Compare with other position types

   Unlike absolute or fixed, relative does not remove the element from the document flow.

3. Final Answer:

   Moves the element relative to its normal position without affecting other elements. -> Option D

4. Quick Check:

   Relative = moves element but keeps space [OK]

Hint: Relative moves element but keeps space in layout [OK]

Common Mistakes:

• Thinking relative removes element from flow
• Confusing relative with absolute or fixed
• Assuming relative positions element at page corner

2. Which of the following is the correct CSS syntax to move an element 10px down using relative positioning?

easy

A. position: relative; bottom: 10px;

B. position: relative; top: 10px;

C. position: absolute; top: 10px;

D. position: fixed; left: 10px;

Solution

1. Step 1: Identify correct property for moving down

   Using top: 10px; moves the element 10px down relative to its normal position.

2. Step 2: Confirm position type

   Position must be relative to use top for relative movement.

3. Final Answer:

   position: relative; top: 10px; -> Option B

4. Quick Check:

   Relative + top moves element down [OK]

Hint: Use top with relative to move down [OK]

Common Mistakes:

• Using bottom to move element down (it moves up)
• Mixing position absolute or fixed instead of relative
• Using left or right instead of top for vertical movement

3. Given this CSS:

div {
  position: relative;
  left: 20px;
  top: 10px;
  background-color: lightblue;
  width: 100px;
  height: 50px;
}

What will be the visual position of the div compared to its normal spot?

medium

A. Shifted 20px right and 10px down from its normal position.

B. Shifted 20px left and 10px up from its normal position.

C. No movement; stays in normal position.

D. Shifted 20px right and 10px up from its normal position.

Solution

1. Step 1: Understand left and top with relative

   Left: 20px moves the element 20px to the right; top: 10px moves it 10px down.

2. Step 2: Combine movements

   Both together shift the element diagonally right and down from its original spot.

3. Final Answer:

   Shifted 20px right and 10px down from its normal position. -> Option A

4. Quick Check:

   Left positive = right, top positive = down [OK]

Hint: Positive left moves right; positive top moves down [OK]

Common Mistakes:

• Thinking left:20px moves left instead of right
• Confusing top positive as moving up
• Ignoring combined effect of left and top

4. This CSS code is intended to move a p element 15px down, but it doesn't work as expected:

p {
  position: relative;
  bottom: 15px;
}

What is the problem?

medium

A. bottom: 15px; moves the element up, not down.

B. The position property should be absolute to move down.

C. The value should be negative like bottom: -15px; to move down.

D. The element needs display: block; to move.

Solution

1. Step 1: Understand bottom property with relative

   Positive bottom: 15px; moves the element up by 15px relative to its normal position.

2. Step 2: Compare intention vs actual behavior

   Intended to move down, but positive bottom moves up instead.

3. Final Answer:

   bottom: 15px; moves the element up, not down. -> Option A

4. Quick Check:

   Bottom positive moves up [OK]

Hint: Positive bottom moves element up, negative moves down [OK]

Common Mistakes:

• Confusing bottom positive as moving down
• Thinking position must be absolute to move
• Believing display affects position movement

5. You want to layer two boxes so the second box overlaps the first by 30px to the right and 20px down, but keep the page layout unchanged. Which CSS is best?

hard

A. First box: position: static; Second box: position: relative; right: 30px; bottom: 20px;

B. First box: position: absolute; Second box: position: absolute; left: 30px; top: 20px;

C. First box: position: relative; Second box: position: relative; left: 30px; top: 20px;

D. First box: position: relative; Second box: position: absolute; left: 30px; top: 20px;

Solution

1. Step 1: Understand layering with relative positioning

   Using position: relative; on both keeps layout space but allows moving the second box over the first.

2. Step 2: Apply left and top offsets to second box

   Setting left: 30px; and top: 20px; moves the second box right and down overlapping the first.

3. Step 3: Avoid absolute to keep layout unchanged

   Absolute removes element from flow, changing layout. Relative keeps layout intact.

4. Final Answer:

   First box: position: relative; Second box: position: relative; left: 30px; top: 20px; -> Option C

5. Quick Check:

   Relative + offsets overlap without layout shift [OK]

Hint: Use relative + left/top to overlap without layout change [OK]

Common Mistakes:

• Using absolute removes element from flow, breaks layout
• Using right/bottom offsets incorrectly for desired direction
• Not setting position relative on first box for layering context