Custom directives in Vue.js allow you to extend the functionality of HTML elements in your templates. In this guide, we'll explore how to create a custom directive named `v-custom` in Vue.js and provide sample code to demonstrate how it can be used to modify the appearance of elements in your application.

Sample Code

Let's create a Vue.js application and define a custom directive `v-custom` that changes the text color of an element:

            Vue.js Custom Directive Example

This is a red text.

This is a blue text.