one way databinding and two way data bidning

a variable update by one way that called as one way databinindg

two way means -> it may be update from server or input of customer from ui , to ui

In Vue.js, data binding is a fundamental concept that allows you to establish a connection between your application's data and the user interface (UI). Vue.js supports both one-way data binding and two-way data binding.
One-way Data Binding:
One-way data binding, as the name suggests, allows data to flow in a single direction, from the component's data to the UI. Whenever the data changes in the component, the corresponding UI elements are automatically updated to reflect the new values.
In Vue.js, one-way data binding is achieved by using the mustache syntax ({{ }}) or the v-bind directive. The mustache syntax allows you to interpolate data directly into the HTML templates, while the v-bind directive is used to bind an attribute or property of an element to a data property in the component.
<div>
  <p>{{ message }}</p>
</div>

In this example, the message data property is bound to the content of the <p> element. Whenever the message property changes in the component, the text in the paragraph will be automatically updated.

Example of one-way data binding with v-bind:

<div>
  <img v-bind:src="imageUrl" alt="Image" />
</div>

Here, the src attribute of the <img> element is bound to the imageUrl data property. If the value of imageUrl changes, the src attribute will be updated accordingly.

2. Two-way Data Binding: Two-way data binding allows data to flow in both directions—between the component's data and the UI. Changes in the UI can update the component's data, and changes in the data can update the UI.

In Vue.js, two-way data binding is achieved using the v-model directive. The v-model directive creates a two-way binding on form inputs and components, enabling you to synchronize the data with user input.

Example of two-way data binding with v-model:

<div>
  <input v-model="message" type="text" />
  <p>{{ message }}</p>
</div>

In this example, the message data property is bound to the input field using v-model. Any changes in the input field will update the message property, and changes in the message property will update the input field.

Two-way data binding is commonly used with form inputs like text fields, checkboxes, radio buttons, and select dropdowns.

It's worth noting that in Vue.js 3, the .sync modifier that was used for two-way data binding in Vue.js 2 has been deprecated. The recommended approach is to use custom events or emit events from child components to update the parent component's data. s