The v-once directive is a Vue.js directive that is used to avoid unwanted re-renders of an element. It treats the element as a static content after rendering it once for the first time. This improves performance as it does not have to be rendered again. First, we will create a div element with the id of choice. The v-once directive is then applied to this element to make it render only once.
Syntax:
v-once
Parameters: This function does not accept any parameter.
Example: This example uses Vue.js to show the working of the data with v-once.
<!DOCTYPE html> <html> <head> <title> VueJS v-once Directive </title> <!-- Load Vuejs --> <script src= </script> </head> <body> <div style="text-align: center; width: 600px;"> <h1 style="color: green;"> neveropen </h1> <b> VueJS | v-once directive </b> </div> <div id="canvas" style= "border: 1px solid #000000; width: 600px; height: 200px;"> <div id="app" style="text-align: center; padding-top: 40px;"> <h1 v-once>{{ data }}</h1> </div> </div> <script> var app = new Vue({ el: '#app', data: { data: 'neveropen' } }) </script> </body> </html> |
Output:
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