v-bind Directive in Vue.js

The v-bind directive is a Vue.js directive used to bind one or more attributes, or a component prop to an element. If that attribute is bonded to our data defined in Vue instance then dynamically changes can be observed as data changes. First, we will create a div element with id as app and let’s apply the v-bind directive to a element. Further, we can use a button execute a function when click even occurs which will inverse the value of data.

Syntax:

v-bind:attribute="expression";

Parameters: This directive accepts expression which will be deciding which attribute value to use.

Example: This example uses Vue.js to toggle the classes of an element with v-bind. Further, we will use CSS to apply a different color to each class so that we can see them changing.

HTML

filter_none

edit
close

play_arrow

link
brightness_4
code

<!DOCTYPE html>
<html>
  
<head>
  
    <!-- Load Vuejs -->
    <script src=
    </script>
  
    <style>
        .active {
            color: blue;
        }
  
        .error {
            color: red;
        }
    </style>
</head>
  
<body>
    <div style="text-align: center;width: 600px;">
        <h1 style="color: green;">
            GeeksforGeeks
        </h1>
        <b>
            VueJS | v-bind 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;">
            <button v-on:click=
                "ifActive = !ifActive">
                Click to Toggle
            </button>
              
            <h1 v-bind:class=
                "{active: ifActive, error: !ifActive}">
                GeeksforGeeks
            </h1>
        </div>
    </div>
  
    <script>
        var app = new Vue({
            el: '#app',
            data: {
                ifActive: true
            }
        })
    </script>
</body>
  
</html>                   

chevron_right


Output:

full-stack-img




My Personal Notes arrow_drop_up

I love Open Source Culture have contributed to phpMyAdmin, LibreOffice, Ant-Design and Web is my passion

If you like GeeksforGeeks and would like to contribute, you can also write an article using contribute.geeksforgeeks.org or mail your article to contribute@geeksforgeeks.org. See your article appearing on the GeeksforGeeks main page and help other Geeks.

Please Improve this article if you find anything incorrect by clicking on the "Improve Article" button below.


Article Tags :

Be the First to upvote.


Please write to us at contribute@geeksforgeeks.org to report any issue with the above content.