How to use JavaScript transition to achieve animation transition effect in Vue

Vue is a front-end framework for building user interfaces. With the continuous development of web applications, the requirements for user experience are becoming higher and higher. Transitions in Vue are a way to achieve animated transition effects that can make your application more interesting and user-friendly. JavaScript transition is a very effective method to achieve animation transition effects in Vue. Here is an introduction to how to use JavaScript transition to achieve animation transition effects in Vue.

Step one: Introduce Vue and Vue transition

Before using Vue to achieve animation transition effects, you must first introduce Vue and Vue transition. You can introduce Vue and Vue transition JS files into the page, or you can install Vue and Vue transition dependency packages through npm, and then introduce them directly in the code.

Step 2: Create Vue transition

In Vue, transition is implemented through the Vue transition component. Therefore, before implementing the animation transition effect, you must first create a Vue transition component. You can define the structure of the transition component through the template attribute of the Vue component, and define the data state of the transition component through the data attribute of the Vue component.

Step Three: Define Transition Style

The most important step to achieve animation transition effect is to define transition style. Before defining the transition style, you need to determine the direction and triggering method of the transition. Vue transition components can specify transition styles through CSS class names. These CSS class names include:

• v-enter: The state when the transition starts;
• v-enter-active: The state during the transition;
• v-enter-to: The state at the end of the transition;
• v-leave: The state at the beginning of the transition;
• v-leave- active: The state during the transition;
• v-leave-to: The state at the end of the transition.

According to the defined transition direction and triggering method, just add corresponding transition styles to these CSS class names.

Step 4: Bind transition events

In Vue, you can control the triggering method and direction of the transition by binding transition events. On the elements of the transition component, you can add the corresponding v-on directive to bind transition events. These transition events include:

• before-enter: triggered before the transition starts;
• enter: Triggered at the beginning of the transition;
• after-enter: Triggered at the end of the transition;
• enter-cancelled: Triggered after the transition was canceled;
• before- leave: Triggered before the transition begins;
• leave: Triggered at the beginning of the transition;
• after-leave: Triggered at the end of the transition;
• leave-cancelled: Triggered at the transition Triggered after being cancelled.

By adding the corresponding v-on directive to the element of the transition component, you can bind the corresponding transition event.

Step 5: Control the transition state

In Vue, you also need to control the transition state to complete the transition effect. The transition state can be controlled through the css attribute in the Vue transition component. This attribute generally includes four attribute values, namely:

• opacity: controls transparency;
• height: controls height. ;
• width: control width;
• transform: control transformation.

By setting the corresponding values ​​​​of these properties, the control of the transition state can be completed.

The above are the steps for using JavaScript transition to achieve animation transition effect in Vue. I hope it will be helpful to realize the animation transition effect of Vue.

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