Introduction to Vue.js Directives

Vue.js directives are special tokens in the markup that tell the library to do something to a DOM element. In this guide, we'll explore two essential directives: `v-bind` and `v-model`.

v-bind Directive

The `v-bind` directive is used to dynamically bind one or more attributes or a component prop to an expression. It's particularly useful for manipulating HTML attributes.

Here's an example of using `v-bind` to set the `href` attribute of an anchor element:

<a v-bind:href="link">Vue.js Official Website</a>
<script>
    new Vue({
        el: '#app',
        data: {
            link: 'https://vuejs.org'
        }
    });
</script>
        

In this example, the `href` attribute of the anchor element is bound to the `link` property in Vue's data. Any changes to the `link` will automatically update the `href` attribute.

v-model Directive

The `v-model` directive is used for two-way data binding on form input elements. It automatically syncs the input value with the underlying data.

Here's an example of using `v-model` to bind an input element to a message property:

<input v-model="message">
<p>{{ message }}</p>
<script>
    new Vue({
        el: '#app',
        data: {
            message: 'Hello, Vue.js!'
        }
    });
</script>
        

With `v-model`, any changes in the input field will automatically update the `message` property, and vice versa.

Conclusion

Vue.js directives like `v-bind` and `v-model` are powerful tools that simplify the process of interacting with the DOM. They enable dynamic and responsive web applications by allowing you to bind data to elements and form fields effortlessly.