Challenge your understanding of Vue transitions and animations with questions on transition classes, hooks, dynamic effects, and best practices. This quiz helps you strengthen your grasp of interactive user interface techniques and smooth state changes using Vue’s transition system.
In a scenario where only one child element needs a transition effect, which Vue component provides this functionality using a simple `u003Ctransitionu003E` wrapper?
Explanation: The u003Ctransitionu003E component in Vue wraps a single element and applies transition effects when the element enters or leaves the DOM. u003Ctransitionsu003E is an invalid tag, and u003Ctransition-groupu003E is used for multiple elements or lists that need to be transitioned together. The u003Canimationu003E tag does not exist in Vue for transitions.
Which class will Vue automatically apply to an element at the start of an enter transition if the transition name is set to 'fade'?
Explanation: Vue applies specific class names based on the transition name; with 'fade', it uses 'fade-enter' during the enter phase. 'fade-transition' and 'fade-in' are not the default class names used by Vue's transition system. 'fade-appear' would be used if the appear property is set, but not by default for standard entering.
When using a transition in a component switch, which mode should be set to ensure that the outgoing element finishes its leave transition before the incoming element starts entering?
Explanation: Setting the mode to 'out-in' delays the entering transition until after the leave transition is complete, providing a smooth visual swap. 'in-out' does the opposite by starting the new element’s enter transition immediately. 'leave-in' and 'wait' are not valid values for the mode property in Vue transitions.
To animate a list where items can be added or removed, which component is specifically designed for this purpose in Vue?
Explanation: u003Ctransition-groupu003E is the component designed to handle transitions for lists or multiple elements, allowing each item to animate individually as it enters or leaves. 'u003Canimation-listu003E', 'u003Cfade-listu003E', and 'u003Canimated-listu003E' are not valid Vue components and will not provide the intended transition effect for lists.
Given a custom JavaScript function that should run when an element begins leaving, which Vue transition hook should you use?
Explanation: 'before-leave' is the correct hook for executing custom logic just as an element starts its leave animation. 'after-enter' triggers after an element finishes entering, 'enter' runs as the element starts entering, and 'destroy' is not a Vue transition hook. Using the correct hook ensures your code runs at the intended animation stage.