OnChange - get previous value?

Question

Is it possible to get the previous value from the OnChange event from a drop down? I need to see the previous selected value, so that I can make a decision on what I should display.

At the moment, I get the new value:

var id = $('.cmbType').val();

But would like to know what it was before the user selected this value.

I think this has already been answered here [Getting value of select (dropdown) before change][1] [1]: http://stackoverflow.com/questions/4076770/getting-value-of-select-dropdown-before-change — beenhere4hours, Jul 05 '14 at 03:52

score 3 · Answer 1 · answered Jul 05 '14 at 05:51

You have to store the previous value yourself:

// store initial value
var initialValue = $('.cmbType').val();
$('.cmbType').data('previousValue', initialValue);

// change handler
$('.cmbType').change(function(e) {

    var previousValue = $(this).data('previousValue');

    // make decision
    alert(previousValue);

    // store previousValue
    $(this).data('previousValue', $(this).val());
});

score 0 · Answer 2 · answered Jul 05 '14 at 03:42

Try some thing like this:

<select id='cmbType'>
    <option value='1' >1</option>
    <option value='2' >2</option>
    <option value='3' >3</option>
</select>

javascript:

var preSelected = -1;
$(function(){
    $('#cmbType').bind('click change', function(e){
        if(e.type == 'change'){
            // change value detect
            alert(preSelected);
        }
        else{
            // click
            preSelected = $(this).val();
        }
    });
});

What if user, focused to that input by pressing `tab` button ? then click event won't be triggered. — santoshe61, Jul 25 '20 at 07:39

score -2 · Answer 3 · answered Jul 05 '14 at 03:45

-2

You can use: .defaultValue Will give you the value.

answered Jul 05 '14 at 03:45

user3806610

1

This is wrong, the object . **defaultValue** property gives you the value set in the HTML code. See [link](http://help.dottoro.com/ljnqsrfe.php) – Viktor Mar 24 '21 at 20:07

OnChange - get previous value?

3 Answers3