Is it possible to selectively implement a transition in VueJS based on certain conditions?

Question

Is it possible to selectively implement a transition in VueJS based on certain conditions?

My goal is to design an alert box component with a customizable reveal transition, which can be optional. Here's a simplified version of what I have in mind:

<template>
    <transition v-if="withTransition">
        <b-alert v-bind="this.$attrs" />
    </transition>
</template>

The plan is to use a withTransition prop to selectively include the transition effect without affecting the display of the alert box.

Using v-if or v-show wouldn't work since they would also show and hide the alert component itself. Additionally, since <transition> doesn't render as a DOM element, it's uncertain how it could be conditionally displayed, if possible at all.

Do you have any recommendations on how to achieve this?

vue.js bootstrap-vue

Answer 1

Answer №1

Utilize the power of dynamic transitions by binding to a transition name through a computed property, allowing you to easily disable the effect when needed.

For instance...

new Vue({
  el: '#app',
  data: () => ({ withTransition: true, show: false }),
  computed: {
    computedTransition () {
      return this.withTransition && 'fade'
    }
  }
})

.alert {
  background-color: #f99;
  border: 1px solid #f66;
  padding: 1rem;
}

.fade-enter-active, .fade-leave-active {
  transition: opacity .5s;
}
.fade-enter, .fade-leave-to /* .fade-leave-active below version 2.1.8 */ {
  opacity: 0;
}

<script src="https://cdn.jsdelivr.net/npm/vue/dist/vue.min.js"></script>

<div id="app">
  <p>
    <label>
      With transition:
      <input type="checkbox" v-model="withTransition"/>
    </label>
  </p>
  <p><button type="button" @click="show = !show">Toggle alert</button></p>
  <transition :name="computedTransition">
    <p class="alert" v-if="show">Something happened</p>
  </transition>
</div>

Answer 2

Utilize the power of dynamic transitions by binding to a transition name through a computed property, allowing you to easily disable the effect when needed.

For instance...

new Vue({
  el: '#app',
  data: () => ({ withTransition: true, show: false }),
  computed: {
    computedTransition () {
      return this.withTransition && 'fade'
    }
  }
})

.alert {
  background-color: #f99;
  border: 1px solid #f66;
  padding: 1rem;
}

.fade-enter-active, .fade-leave-active {
  transition: opacity .5s;
}
.fade-enter, .fade-leave-to /* .fade-leave-active below version 2.1.8 */ {
  opacity: 0;
}

<script src="https://cdn.jsdelivr.net/npm/vue/dist/vue.min.js"></script>

<div id="app">
  <p>
    <label>
      With transition:
      <input type="checkbox" v-model="withTransition"/>
    </label>
  </p>
  <p><button type="button" @click="show = !show">Toggle alert</button></p>
  <transition :name="computedTransition">
    <p class="alert" v-if="show">Something happened</p>
  </transition>
</div>

Answer 3

Answer №2

Implementing an inline ternary condition for transitions

If you need to quickly evaluate a variable, consider using the following method:

<transition :name="someVariable == 'someValue' ? 'myTransitionA' : 'myTransitionB'">

The variable someVariable can be sourced from various sources (such as props, data, computed properties, or methods).

To deactivate a transition entirely under certain conditions, simply assign the transition name (e.g. 'myTransitionB') to an empty string ''.

This approach is particularly useful for switching between transitions based on different user interface contexts, like mobile and desktop. For instance, enabling sliding control bars on mobile while keeping them static on desktop.

Answer 4

Implementing an inline ternary condition for transitions

If you need to quickly evaluate a variable, consider using the following method:

<transition :name="someVariable == 'someValue' ? 'myTransitionA' : 'myTransitionB'">

The variable someVariable can be sourced from various sources (such as props, data, computed properties, or methods).

To deactivate a transition entirely under certain conditions, simply assign the transition name (e.g. 'myTransitionB') to an empty string ''.

This approach is particularly useful for switching between transitions based on different user interface contexts, like mobile and desktop. For instance, enabling sliding control bars on mobile while keeping them static on desktop.

Is it possible to selectively implement a transition in VueJS based on certain conditions?

Answer №1

Answer №2

Implementing an inline ternary condition for transitions

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