CSS transition classes in Vue - Cheat Sheet & Quick Revision

Recall & Review

beginner

What is the purpose of CSS transition classes in Vue?

CSS transition classes in Vue help animate elements when they enter, leave, or change state by applying CSS styles at specific stages of the transition.

beginner

Name the four main CSS transition classes Vue automatically applies during a transition.

The four main classes are: v-enter-from, v-enter-active, v-leave-from, and v-leave-active. They control the start and active states of entering and leaving transitions.

intermediate

How does Vue use the -from and -active classes differently during a transition?

-from classes set the initial state of the element before the transition starts. -active classes define the transition properties like duration and easing while the transition runs.

intermediate

What role does the <code>v-enter-to</code> class play in Vue transitions?

The <code>v-enter-to</code> class sets the final state of the element after the transition starts, replacing the <code>v-enter-from</code> class to smoothly animate to the new style.

beginner

Why is it important to define both transition-property and transition-duration in CSS transition classes?

Defining transition-property tells the browser which CSS properties to animate, and transition-duration sets how long the animation lasts. Without these, transitions won't animate smoothly or at all.

Which Vue CSS transition class sets the starting style before an element enters?

A v-enter-from

B v-leave-active

C v-enter-to

D v-leave-from

The v-enter-from class sets the initial style before the element starts entering.

What does the v-leave-active class control during a transition?

A The initial style before leaving

B The final style after leaving

C The transition properties like duration and easing while leaving

D It is not used in Vue transitions

v-leave-active controls the transition timing and easing during the leave animation.

Which CSS property must be defined to make a transition animate?

A animation-name

B position

C display

D transition-property

transition-property tells the browser which CSS properties to animate.

In Vue, what happens after the v-enter-from class is removed?

A The element is removed from the DOM

B The <code>v-enter-to</code> class is added to animate to the final state

C The transition stops immediately

D The element becomes hidden

After v-enter-from is removed, v-enter-to is added to animate the element to its final style.

Which Vue transition class is NOT automatically added during a transition?

A v-enter-done

B v-leave-to

C v-enter-active

D v-leave-from

The v-enter-done class is added after the transition completes.

Explain how Vue uses CSS transition classes to animate an element entering the page.

Think about the order classes are added and removed during enter.

Describe why defining transition properties in CSS is important for Vue transitions to work smoothly.

Consider what happens if duration or property is missing.