---
title: "What are the role of change event in JQ?"  
description: "What are the role of change event in JQ?"  
author: "Ethan Karla"  
published: 2021-07-28  
canonical: https://answers.mindstick.com/qa/93830/what-are-the-role-of-change-event-in-jq  
category: "web application"  
tags: ["web development", "web application development"]  
reading_time: 2 minutes  

---

# What are the role of change event in JQ?

What are the [role](https://yourviews.mindstick.com/view/85446/national-doctor-s-day-recognizing-the-indispensable-role-of-doctors-in-one-s-life) of [change event](https://www.mindstick.com/forum/866/jquery-during-slidetoggle-class-change-event) in JQ?

## Answers

### Answer by Ravi Vishwakarma

The jQuery change [event](https://www.mindstick.com/articles/54942/6-tips-for-organising-a-successful-corporate-event) occurs when we change any data. After change, focus is out then it is active it is commonly used textfields, textrea, select tag.

```
Syntax
$(selector).change()
$(selector).change(function)
```

```
<!doctype html>
<html lang='en'>
<head>
    <!-- Required meta tags -->
    <meta charset='utf-8'>
    <meta name='viewport' content='width=device-width, initial-scale=1, shrink-to-fit=no'>
    <script src='https://ajax.googleapis.com/ajax/libs/jquery/3.5.1/jquery.min.js'></script>
    <!-- Bootstrap CSS -->
    <link rel='stylesheet' href='https://stackpath.bootstrapcdn.com/bootstrap/4.3.1/css/bootstrap.min.css' integrity='sha384-ggOyR0iXCbMQv3Xipma34MD+dH/1fQ784/j6cY/iJTQUOhcWr7x9JvoRxT2MZw1T' crossorigin='anonymous'>
    <title>change Event demo</title>
    <script>
        $(document).ready(function () {
            $('#txt1').change(function () {
                $('#txt2').val($(this).val());
                $('p').text($(this).val());
            });
        });
    </script>
</head>
<body>
    <div class='container'>
        <div class='m-2'>
            <input type='text' placeholder='Enter some data' class='form-control m-1' id='txt1'/>
            <input type='text' placeholder='Enter password ' class='form-control m-1' id='txt2'/>
        <button class='btn btn-primary m-1' >Submit</button>
            <p class='alert alert-success rounded-sm p-2 m-1'>No selected data</p>
        </div>
    </div>
    <script src='https://code.jquery.com/jquery-3.3.1.slim.min.js' integrity='sha384-q8i/X+965DzO0rT7abK41JStQIAqVgRVzpbzo5smXKp4YfRvH+8abtTE1Pi6jizo' crossorigin='anonymous'></script>
    <script src='https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.14.7/umd/popper.min.js' integrity='sha384-UO2eT0CpHqdSJQ6hJty5KVphtPhzWj9WO1clHTMGa3JDZwrnQq4sF86dIHNDz0W1' crossorigin='anonymous'></script>
    <script src='https://stackpath.bootstrapcdn.com/bootstrap/4.3.1/js/bootstrap.min.js' integrity='sha384-JjSmVgyd0p3pXB1rRibZUAYoIIy6OrQ6VrjIEaFf/nJGzIxFDsf4x0xIM+B07jRM' crossorigin='anonymous'></script>
</body>
</html>
```

![What are the role of change event in JQ?](https://answers.mindstick.com/questionanswer/ef68413a-51d1-48f1-b9ef-f2d3b8b05871/images/d6762507-e35b-43b3-9503-118d16ab6736.png)

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Original Source: https://answers.mindstick.com/qa/93830/what-are-the-role-of-change-event-in-jq

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