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jQuery get value of select onChange


Question

I was under the impression that I could get the value of a select input by doing this $(this).val(); and applying the onchange parameter to the select field.

It would appear it only works if I reference the ID.

How do I do it using this.

2013/03/26
1
799
3/26/2013 7:26:58 AM

Accepted Answer

Try this-

$('select').on('change', function() {
  alert( this.value );
});
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>

<select>
    <option value="1">One</option>
    <option value="2">Two</option>
</select>

You can also reference with onchange event-

function getval(sel)
{
    alert(sel.value);
}
<select onchange="getval(this);">
    <option value="1">One</option>
    <option value="2">Two</option>
</select>

2018/08/04
1533
8/4/2018 3:53:48 PM

I was under the impression that I could get the value of a select input by doing this $(this).val();

This works if you subscribe unobtrusively (which is the recommended approach):

$('#id_of_field').change(function() {
    // $(this).val() will work here
});

if you use onselect and mix markup with script you need to pass a reference to the current element:

onselect="foo(this);"

and then:

function foo(element) {
    // $(element).val() will give you what you are looking for
}
2012/06/24

This is helped for me.

For select:

$('select_tags').on('change', function() {
    alert( $(this).find(":selected").val() );
});

For radio/checkbox:

$('radio_tags').on('change', function() {
    alert( $(this).find(":checked").val() );
});
2015/04/09

Try the event delegation method, this works in almost all cases.

$(document.body).on('change',"#selectID",function (e) {
   //doStuff
   var optVal= $("#selectID option:selected").val();
});
2017/07/20

You can try this (using jQuery)-

$('select').on('change', function()
{
    alert( this.value );
});
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js"></script>

<select>
    <option value="1">Option 1</option>
    <option value="2">Option 2</option>
    <option value="3">Option 3</option>
    <option value="4">Option 4</option>
</select>

Or you can use simple Javascript like this-

function getNewVal(item)
{
    alert(item.value);
}
<select onchange="getNewVal(this);">
    <option value="1">Option 1</option>
    <option value="2">Option 2</option>
    <option value="3">Option 3</option>
    <option value="4">Option 4</option>
</select>

2018/08/20

$('#select_id').on('change', function()
{
    alert(this.value); //or alert($(this).val());
});



<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js"></script>

<select id="select_id">
    <option value="1">Option 1</option>
    <option value="2">Option 2</option>
    <option value="3">Option 3</option>
    <option value="4">Option 4</option>
</select>
2019/09/13