Menu
×
   ❮   
HTML CSS JAVASCRIPT SQL PYTHON JAVA PHP HOW TO W3.CSS C C++ C# BOOTSTRAP REACT MYSQL JQUERY EXCEL XML DJANGO NUMPY PANDAS NODEJS R TYPESCRIPT ANGULAR GIT POSTGRESQL MONGODB ASP AI GO KOTLIN SASS VUE DSA GEN AI SCIPY AWS CYBERSECURITY DATA SCIENCE
     ❯   

Vue Tutorial

Vue HOME Vue Intro Vue Directives Vue v-bind Vue v-if Vue v-show Vue v-for Vue Events Vue v-on Vue Methods Vue Event Modifiers Vue Forms Vue v-model Vue CSS Binding Vue Computed Properties Vue Watchers Vue Templates

Scaling Up

Vue Why, How and Setup Vue First SFC Page Vue Components Vue Props Vue v-for Components Vue $emit() Vue Fallthrough Attributes Vue Scoped Styling Vue Local Components Vue Slots Vue v-slot Vue Scoped Slots Vue Dynamic Components Vue Teleport Vue HTTP Request Vue Template Refs Vue Lifecycle Hooks Vue Provide/Inject Vue Routing Vue Form Inputs Vue Animations Vue Animations with v-for Vue Build Vue Composition API

Vue Reference

Vue Built-in Attributes Vue Built-in Components Vue Built-in Elements Vue Component Instance Vue Directives Vue Instance Options Vue Lifecycle Hooks

Vue Examples

Vue Examples Vue Exercises Vue Quiz Vue Server Vue Certificate

Vue v-once Directive


Example

Using the v-once directive to render an <img> element only once.

<template>
  <h1>v-once Example</h1>
  <p>The image is only rendered once. Changing the image source does not have any effect.</p>
  <img v-once v-bind:src="imgUrl[imgIndex]">
  <p>Img src: '{{ imgUrl[imgIndex] }}'</p>
  <button v-on:click="changeImg">Change image</button>
</template>
Run Example »

Definition and Usage

The v-once directive is used to only render an element once.

By only rendering an element once, the performance can be enhanced.

When an element has the v-once directive, all its child elements also becomes static after the first render.

How often an element gets rendered can also be limited by the v-memo directive to gain performance.


Related Pages

Vue Reference: Vue v-memo Directive

Vue Tutorial: Vue v-bind Directive

Vue Tutorial: Vue v-on Directive

Vue Tutorial: Vue Methods

Vue Tutorial: Vue Lifecycle Hooks