jQuery change event occurs when the value of an element is changed. It works only on form fields. When the change event occurs, the change () method attaches a function with it to run.
Note: This event is limited to <input> elements, <textarea> boxes and <select> elements.
- For select boxes, checkboxes, and radio buttons: The event is fired immediately when the user makes a selection with the mouse.
- For the other element types: The event is occurred when the field loses focus.
Syntax:
$(selector).change() It triggers the change event for selected elements.
$(selector).change(function) It adds a function to the change event.
Parameters of jQuery change() event
| Parameter | Description |
|---|---|
| Function | It is an optional parameter. It is used to specify the function to run when the change event occurs for the selected elements. |
Example of jQuery change() event
Let’s take an example to demonstrate jQuery change() event.
- <!DOCTYPE html>
- <html lang="en">
- <head>
- <meta charset="utf-8">
- <title>change demo</title>
- <style>
- div {
- color: red;
- }
- </style>
- <script src="https://code.jquery.com/jquery-1.10.2.js"></script>
- </head>
- <body>
- <select id="se" name="actors" >
- <option>Uthappa</option>
- <option selected="selected">Kattapa</option>
- <option>Veerappa</option>
- <option>Bahubali</option>
- <option>Bhallal Dev</option>
- <option>Awantika</option>
- </select>
- <div id="loc"></div>
- <script>
- $( "select" ) .change(function () {
- document.getElementById("loc").innerHTML="You selected: "+document.getElementById("se").value;
- });
- </script>
- </body>
- </html>
Output: Uthappa Kattapa Veerappa Bahubali Bhallal Dev Awantika
Let’s see another example of jQuery change event where we are providing option to select multiple data using ctrl key.
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8">
<title>change demo</title>
<style>
div {
color: red;
}
</style>
<script src="https://code.jquery.com/jquery-1.10.2.js"></script>
</head>
<body>
<select name="Employees" multiple="multiple">
<option>Uthappa</option>
<option selected="selected">Kattapa</option>
<option>Veerappa</option>
<option selected="selected">Bahubali</option>
<option>Bhallal Dev</option>
<option>Awantika</option>
</select>
<div></div>
<script>
$( "select" )
.change(function () {
var str = "";
$( "select option:selected" ).each(function() {
str += $( this ).text() + " ";
});
$( "div" ).text( str );
})
.change();
</script>
</body>
</html>
Output: Uthappa Kattapa Veerappa Bahubali Bhallal Dev Awantika
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