Transition timing functions in CSS - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to set a smooth transition timing function for the button.

CSS

button {
  transition: background-color 0.5s [1];
}

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

Alinear

Bease-in

Cfast

Dslow

Attempts:

3 left

💡 Hint

Common Mistakes

Using invalid timing functions like 'fast' or 'slow'.

Confusing 'ease-in' with 'linear'.

The linear timing function makes the transition progress at a constant speed.

2fill in blank

medium

Complete the code to make the transition start slowly and speed up.

CSS

div {
  transition-timing-function: [1];
}

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

Aease-in

Blinear

Cease-out

Dstep-start

Attempts:

3 left

💡 Hint

Common Mistakes

Choosing ease-out instead of ease-in.

Using step-start which jumps abruptly.

ease-in makes the transition start slowly and then speed up.

3fill in blank

hard

Fix the error in the transition timing function to make it valid CSS.

CSS

p {
  transition-timing-function: [1];
}

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

Aeasein

Bease-in

Clinear-gradient

Dease_out

Attempts:

3 left

💡 Hint

Common Mistakes

Writing 'easein' without a hyphen.

Using underscores or invalid functions.

The correct syntax uses a hyphen: ease-in. Other options are invalid CSS values.

4fill in blank

hard

Fill both blanks to create a transition that starts fast and ends slowly with a duration of 1 second.

CSS

div {
  transition: opacity 1s [1];
  transition-timing-function: [2];
}

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

Aease-out

Bease-in

Cease

Dlinear

Attempts:

3 left

💡 Hint

Common Mistakes

Mixing ease-in with ease-out.

Using linear which is constant speed.

ease-out makes the transition start fast and end slowly. It is used both in shorthand and timing function.

5fill in blank

hard

Fill all three blanks to create a transition on color that lasts 2 seconds, uses a custom cubic-bezier curve, and starts slowly then speeds up.

CSS

button {
  transition-property: [1];
  transition-duration: [2];
  transition-timing-function: [3];
}

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

Acolor

B2s

Ccubic-bezier(0.4, 0, 1, 1)

Dbackground-color

Attempts:

3 left

💡 Hint

Common Mistakes

Using background-color instead of color.

Forgetting the 's' in duration like '2' instead of '2s'.

Using an incorrect cubic-bezier syntax.

The property is color, duration is 2s, and the cubic-bezier curve cubic-bezier(0.4, 0, 1, 1) starts slow and speeds up.

Practice

1. What does the CSS property transition-timing-function control?

easy

A. The speed curve of the transition animation

B. The color of the element during transition

C. The size of the element after transition

D. The delay before the transition starts

Solution

1. Step 1: Understand the property purpose

   The transition-timing-function defines how the speed of the transition changes over time, like speeding up or slowing down.

2. Step 2: Compare options to definition

   Only The speed curve of the transition animation describes controlling the speed curve of the animation, others describe unrelated properties.

3. Final Answer:

   The speed curve of the transition animation -> Option A

4. Quick Check:

   Timing function controls speed curve [OK]

Hint: Timing function = speed curve of animation [OK]

Common Mistakes:

• Confusing timing function with delay
• Thinking it changes color or size
• Mixing with transition-duration

2. Which of the following is the correct syntax to apply a linear transition timing function in CSS?

easy

A. transition-timing-function = linear;

B. transition-timing-function: linear;

C. transition-timing-function: 'linear';

D. transition-timing-function: linear()

Solution

1. Step 1: Recall CSS property syntax

   CSS properties use colon : to assign values without quotes for keywords.

2. Step 2: Check each option

   transition-timing-function: linear; uses correct syntax: property, colon, value without quotes or parentheses. Others have invalid syntax.

3. Final Answer:

   transition-timing-function: linear; -> Option B

4. Quick Check:

   Correct CSS syntax uses colon and no quotes [OK]

Hint: CSS properties use colon and no quotes for keywords [OK]

Common Mistakes:

• Using equals sign instead of colon
• Adding quotes around keywords
• Adding parentheses to keywords

3. Given the CSS below, what will be the visual effect of the transition timing function?

div {
  width: 100px;
  height: 100px;
  background: blue;
  transition: width 2s ease-in;
}
div:hover {
  width: 200px;
}

medium

A. The width will increase quickly at first, then slow down.

B. The width will increase at a constant speed.

C. The width will increase slowly at first, then speed up.

D. The width will jump instantly to 200px without animation.

Solution

1. Step 1: Understand ease-in timing function

   ease-in means the animation starts slow and speeds up towards the end.

2. Step 2: Apply to width change on hover

   When hovering, width changes from 100px to 200px over 2 seconds, starting slow and accelerating.

3. Final Answer:

   The width will increase slowly at first, then speed up. -> Option C

4. Quick Check:

   ease-in = slow start, speed up [OK]

Hint: ease-in means slow start, speed up [OK]

Common Mistakes:

• Confusing ease-in with ease-out
• Expecting constant speed
• Thinking no animation occurs

4. Identify the error in this CSS snippet:

button {
  transition-timing-function linear;
  transition-duration: 1s;
}

medium

A. Missing colon after transition-timing-function

B. Incorrect property name, should be transition-timing

C. Value linear is invalid

D. Missing semicolon after transition-duration

Solution

1. Step 1: Check CSS property syntax

   CSS properties require a colon : between property and value.

2. Step 2: Locate error in snippet

   The line transition-timing-function linear; misses the colon after the property name.

3. Final Answer:

   Missing colon after transition-timing-function -> Option A

4. Quick Check:

   Property-value pairs need colon [OK]

Hint: CSS properties always need colon between name and value [OK]

Common Mistakes:

• Omitting colon after property name
• Confusing property names
• Assuming semicolon is optional

5. You want a button's background color to change smoothly over 0.5 seconds, starting fast and slowing down at the end. Which transition-timing-function should you use?

hard

A. ease-in-out

B. ease-in

C. linear

D. ease-out

Solution

1. Step 1: Understand timing function meanings

   ease-out means the animation starts fast and slows down at the end, exactly what is needed.

2. Step 2: Compare other options

   ease-in is slow start, fast end; linear is constant speed; ease-in-out is slow start and end with fast middle.

3. Final Answer:

   ease-out -> Option D

4. Quick Check:

   Fast start, slow end = ease-out [OK]

Hint: ease-out = fast start, slow end [OK]

Common Mistakes:

• Mixing up ease-in and ease-out
• Choosing linear for smooth easing
• Assuming ease-in-out fits all cases