Introduction to Vue.js Data Binding

Vue.js simplifies interactivity in web applications through data binding. Data binding allows you to effortlessly synchronize your application's data with the user interface. In this guide, you'll learn how Vue.js makes interactivity easy using data binding.

One-Way Data Binding

Vue.js provides one-way data binding, which means that you can bind data from your JavaScript to your HTML. When the data in JavaScript changes, the corresponding part of your HTML automatically updates. Here's an example:

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

In this example, the message in JavaScript is bound to the HTML, and any changes to the message will be reflected in the paragraph.

Two-Way Data Binding

Vue.js also supports two-way data binding, which allows you to bind form inputs to JavaScript data properties. Changes in the input field will update the data and vice versa. Here's an example:

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

In this example, any text you type into the input field will immediately update the associated message in both the input and paragraph elements.

Conclusion

Vue.js data binding simplifies the task of making your web applications interactive. Whether you need one-way or two-way data binding, Vue.js provides easy and efficient ways to keep your data and user interface in sync.