Transitioning Between Components and Elements:

To add transitions between components or elements in Vue.js, you would use either the <transition> component or the <transition-group> component.

The <transition> component enables you to apply CSS-based transition effects when inserting, updating or removing single elements from the DOM, while on the other hand, groups of elements can be given similar treatment using the <transition-group> component.

Example:

                                  
<div id="app">
  <transition name="fade">
    <p v-if="show">Hello, Vue!</p>
  </transition>
  <button @click="toggle">Toggle</button>
</div>

<style>
.fade-enter-active, .fade-leave-active {
  transition: opacity 0.5s;
}
.fade-enter, .fade-leave-to {
  opacity: 0;
}
</style>

<script>
new Vue({
  el: '#app',
  data: {
    show: false
  },
  methods: {
    toggle() {
      this.show = !this.show;
    }
  }
});
</script>
                                  
                                

For instance, we have a Vue component with a <transition> containing a <p>. This will make transparent effect applied on addition or deleting of . We also define CSS classes for controlling opacity changes during this transition by defining fade-enter-active, fade-leave-active, fade-enter and fade-leave-to.

Vue update the version whenever the show data changes. At the same time, js will work by add or remove the <p> element from the DOM.

It will obtain the transition effect with the help of the CSS classes.

Vue.js allows you to create smooth as well as visually appealing effects that improve user experiences. By applying animations and transitions upon adding components or changing them in your application, their look and feel is improved.