Vue.js is a progressive framework for building user interfaces. The core library is focused on the view layer only and is easy to pick up and integrate with other libraries. Vue is also perfectly capable of powering sophisticated Single-Page Applications in combination with modern tooling and supporting libraries.
Conditional Rendering in Vue makes it easy to toggle the presence of any element in the DOM based on a certain condition. The directives v-if and v-else are used for this purpose.Â
The v-if directive can be used to conditionally render a block. It can be assigned a boolean variable and based on the value it toggles the underlying DOM element. The v-else directive can be used to render a block that does not fulfill the condition of the v-if directive. This directive must immediately follow the v-if directive for it to work. The v-else-if directive can also be used to chain multiple conditionals.
The below examples demonstrate conditional rendering in Vue.js:
Example 1: In this example, the text given in the v-if directive will be shown if the isVisible variable is true.
Filename: index.html
HTML
<html> <head>   <script src=   </script> </head> <body>   <div id='parent'>     <h1 style="color: green">       neveropen     </h1>     <strong v-if="isVisible">       This text is visible!     </strong>   </div>   <script src='app.js'></script> </body> </html> |
Filename: app.js
Javascript
const parent = new Vue({   el : '#parent',   data :         // Data is interpolated     // in the DOM     isVisible: false  } }) |
Output:
Example 2:
Filename: index.html
HTML
<html> <head>   <script src=   </script> </head> <body>   <div id='parent'>     <h1 style="color: green">       neveropen     </h1>     <h3>Data Structure Course</h3>     <p v-if='gfg'>       neveropen Self paced Data Structure       course is Awesome!     </p>       <p v-else>       Not neveropen course!     </p>     </div>   <script src='app.js'></script> </body> </html> |
Filename: app.js
Javascript
const parent = new Vue({   el : '#parent',   data : {         // Data is interpolated     // in the DOM     gfg: true  } }) |
Output:
- When the gfg variable is set to true
- When the gfg variable is set to false
