HTML onchange Event Attribute
Example
Execute a JavaScript when a user changes the selected option of a <select> element:
<select onchange="myFunction()">
Try it yourself »
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> |
|---|
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
