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Introduction to chúng tôi Transition

Working with these chúng tôi transitions is much easier as chúng tôi provides a transition component that goes around/ wraps the element or component due to animation. As the word sounds, the transition is when a change occurs while something moves from one state to another. State, in a sense starting point and the ending point.

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How does chúng tôi Transitions Work?

Syntax:

Attribute ‘transition’ can be used along with,

v-if: Conditional rendering of a block

v-show: Conditional displaying of an element

v-for: Rendered for insertion and removal of an element from DOM for animation changes

Dynamic components: Used to switch between multiple components

When an element is inserted or removed from DOM, Vue will:

Automatically check whether the target element has CSS transitions or animations, and hence add or remove the CSS classes

To register a JavaScript transition hooks object, you can use the Vue.transition(id, hooks) method or pass the ID ‘my-transition.’ If a transition with the specified ID is found, the corresponding transition hooks will be called at different stages of the transition process.

Without JavaScript hooks or CSS transitions/animations, DOM operations such as insertion and deletion will be performed immediately on the next frame.

Listing out some of the transition effects on DOM elements,

Using JavaScript to manipulate DOM elements during transition hooks directly

Integration of 3rd party CSS animations

Used for positioning of SVG nodes

State transitions help in setting size and other properties of elements

Integration of 3rd part JavaScript animation libraries

Automatically applying classes for CSS transitions or animations

Animating numbers, calculations, and colors used for displaying

Examples of chúng tôi Transition

Following are the examples are given below:

Example #1 – Simple Fade in and Out Transition

Code:

.fade-enter-active, .fade-leave-active { transition: opacity 2s; } .fade-enter, .fade-leave-to { opacity: 0; } new Vue({ el: “#demo_transition_fade”, data: { show: false } });

Output:

The classes v-enter, v-enter-to, and v-enter-active fall under entering transition.

Prefix v- being a default while using a transition element.

Let X and Y be two separate states for transitioning

V-enter: The class defines the starting state of the X part of the transition and is added before the element is inserted.

V-enter-to: The class defines the ending state of the Y part of the transition and is removed when the transition or animation is complete.

V-enter-active: The class defines the active state during the entering phase and specifies how to move from the X state to the Y state. It includes the duration, easing curve, and delay for the entering transitions.

V-leave: The class defines the starting state for the leave transition.

V-leave-to: The class defines the ending state for the leave transition.

V-leave-active: The class defines the active state during the leaving phase. It also includes the duration, easing curve, and delay for the leaving transitions.

Example #2 –Bounce transition of text

Code:

.bounce-enter-active { animation: bounce-in 0.9s; } .bounce-leave-active { animation: bounce-in 1.5s reverse; } @keyframes bounce-in { 0% { transform: scale(0); } 50% { transform: scale(1.4); } 100% { transform: scale(1.1); } } Vue.js transition bounce is being shown here using v-if new Vue({ el: “#demo_transition_bounce”, data: { show: false } });

Output:

Example #3 – Custom Transition Classes in Vue.js

Code:

Output:

With this, we come to an end of the topic ‘Vue.js Transition.’ Illustrated a few examples through which we have simple kind of transitions. Got to know how chúng tôi transitions work and what are all the classes of transitions, enter/ leave transitions. With this fundamental knowledge of transitions, it is way much easier to see how CSS animations work which will also help us to understand JavaScript animations.