The stability of Vue.js dynamic components remains constant

I am developing a Vue.js single-page application where I intend to smoothly transition between different sections of content:

<template>
    <transition name="fade">
        <component 
            :is="options[active].type" 
            v-bind="options[active].props"
        />
    </transition>
</template>

<script>
const content = [
    {type: 'ContentHeader', props: {...}},
    {type: 'ContentModule', props: {...}},
    {type: 'ContentModule', props: {...}}
];

import ContentHeader from '...';
import ContentModule from '...';

export default {
    components: {
        ContentHeader,
        ContentModule
    },

    data: () => ({
        active: 0,
        options: content
    })
};
</script>

When I update the active property from 0 to 1, the dynamic component changes and triggers the transition. However, switching to the last component does not trigger a transition - even though it has the same element type as the previous one. The component's props are different and render correctly, but the transition fails to acknowledge the change and doesn't activate.

Any suggestions on how to address this issue? Or perhaps an alternative method for transitioning between modules in Vue.js?

Answer №1

When a component is reused, there is no new instance to replace it with, so the transition does not occur as the template is being reused. This is the default behavior, but it can be modified by implementing a unique key:

<component 
    :is="options[active].type" 
    v-bind="options[active].props"
    :key="active"
/>

In this example, I am using the active index as a way for Vue to recognize that each component should have its own fresh instance.

This issue often arises in scenarios where a router has multiple routes using the same component, and in such cases, utilizing a key is recommended.

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