HTML onchange Attribute

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 <select> elements.

Applies to

The onchange attribute is part of the Event Attributes, and can be used on any HTML elements.

Elements Event
All HTML elements onchange


Select Example

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

<select onchange="myFunction()">
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Input 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)">
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Browser Support

Event Attribute
onchange Yes Yes Yes Yes Yes