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HTML onchange Event Attribute

HTML Event Attributes HTML Event Attributes

Example

Execute a JavaScript when a user changes the selected option of a <select> element:

<select onchange="myFunction()">

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More "Try it Yourself" examples below.


Definition and Usage

The onchange attribute fires the moment when the value of the element is changed.

Tip: This event is similar to the oninput event. The difference is that the oninput event occurs immediately after the value of an element has changed, while onchange occurs when the element loses focus. The other difference is that the onchange event also works on <keygen> and <select> elements.


Browser Support

Event Attribute
onchange Yes Yes Yes Yes Yes

Differences Between HTML 4.01 and HTML5

None.


Syntax

<element onchange="script">

Attribute Values

Value Description
script The script to be run on onchange

Technical Details

Supported HTML tags: <input type="checkbox">, <input type="file">, <input type="password">, <input type="radio">, <input type="range">, <input type="search">, <input type="text">, <keygen>, <select> and <textarea>

Examples

More Examples

Example

Execute a JavaScript when the user changes the content of an input field:

<input type="text" name="txt" value="Hello" onchange="myFunction(this.value)">

Try it yourself »

Related Pages

HTML DOM reference: onchange event


HTML Event Attributes HTML Event Attributes