Vue Tip: Avoid Unwanted Re-Renders of an Element Using v-once

Template

The v-once directive is a Vue.js directive used to avoid unwanted re-renders of an element.

It optimizes the update performance by rendering the element and component only once.

Vue will treat the element/component and its children as static content on subsequent re-render.

<p v-once>This text will never change: {{ message }}</p>

If we put the v-once directive on an element with children, these would also be treated as static content:

<section v-once> <h1>My Headline</h1> <p>{{ message }}</p> </section>

Info

Since 3.2, you can also memoize part of the template with invalidation conditions using v-memo.

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