What is the easiest and best way to trigger change event when setting the value of select element.
I've expected that executing the following code
$('select#some').val(10);
or
$('select#some').attr('value', 10);
would result in triggering the change event, which i think is pretty logic thing to be done. Right?
Well, it isn't the case. You need to triger change() event by doing this
$('select#some').val(10).change();
or
$('select#some').val(10).trigger('change');
but i'm looking for some solution which would trigger change event as soon as select's value is changed by some javascript code.
I had a very similar issue and I'm not quite sure what you're having a problem with, as your suggested code worked great for me. It immediately (a requirement of yours) triggers the following change code.
$('#selectField').change(function(){
if($('#selectField').val() == 'N'){
$('#secondaryInput').hide();
} else {
$('#secondaryInput').show();
}
});
Then I take the value from the database (this is used on a form for both new input and editing existing records), set it as the selected value, and add the piece I was missing to trigger the above code, ".change()".
$('#selectField').val(valueFromDatabase).change();
So that if the existing value from the database is 'N', it immediately hides the secondary input field in my form.