JavaScript Get Select Tag value onchange

In this tutorial we will learn how to Get Select Tag value onchange with JavaScript. HTML DOM value property and onchange event can be used to get the value of selected option as soon as option is changed.

HTML Code

HTML Code is given below, in this code we have a select tag with four options. onchange event is used in this select tag to trigger the user defined function getValue().

<select onchange="getValue(this)" name="languages">
<option value="html">HTML</option>    
<option value="css">CSS</option>    
<option value="javascript">JavaScript</option>    
<option value="php">PHP</option>    
</select>   

JavaScript Code

Take a look at the JavaScript code, the HTML Dom value property and onchange event is used in this code.

onchange event occurs when the value of an element is changed.

value property sets or returns the value of the selected option in select tag.

As soon as the option of select tag is changed, a change event will occur and it will trigger the getValue() JavaScript funcion.

Inside the function this keyword is used to target the select tag and value property is used to get it's new value.

It is then displayed using alert() method.

<script>
function getValue(event)
{
 var value = event.value;
 alert(value);    
}
</script>

Demo

Video Tutorial

Watch video tutorial on How To Get Select Tag value onchange in JavaScript.

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