If you wish to set the text field based on changes to a dropdown list.
For Formidable Forms, you can go to the Form’s Settings -> Customize HTML and add the Javascript code in the “After Fields” section.
The following source code will change the value of a text field based on changes to a dropdown list.
<script type="text/javascript">
jQuery(document).ready(function($){
//when there is change in dropdown field 28
$('select[name="item_meta[28]"]').change(function(){
//print the value of field 28 to console
console.log($('select[name="item_meta[28]"]').val())
//if the value of field 28 is not empty
if ($('select[name="item_meta[28]"]').val() != "")
{
//set var1 to the value of field 28
var var1 = $('select[name="item_meta[28]"]').val();
//set the text field with key of pgr_symbol_db as that of field 28
$("#field_pgr_symbol_db").val(var1);
}
else
return;
});
});
</script>