Aquileo | Vue.js v-once Directive

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.

HTML

<!DOCTYPE html>
<html>

<head>
    <title>
        VueJS v-once Directive
    </title>

    <!-- Load Vuejs -->
    <script src=
"https://cdn.jsdelivr.net/npm/vue/dist/vue.js">
    </script>
</head>

<body>
    <div style="text-align: center;
              width: 600px;">
        <h1 style="color: green;">
            GeeksforGeeks
        </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: 'GeeksforGeeks'
            }
        })
    </script>
</body>

</html>

Output:

Vue.js v-once Directive

Explore