How do I change selected value of select2 dropdown with JqGrid?

Question

I'm using Oleg's select2 demo, but I am wondering whether it would be possible to change the currently selected value in the dropdown menu.

For example, if the four values loaded were: "Any", "Fruit", "Vegetable", "Meat" and the dropdown list defaulted to "Any", how would I be able to change that to "Fruit" in the JqGrid event loadComplete?

Is this possible?

Answer 1

For select2 version >= 4.0.0

The other solutions might not work, however the following examples should work.

Solution 1: Causes all attached change events to trigger, including select2

$('select').val('1').trigger('change');

Solution 2: Causes JUST select2 change event to trigger

$('select').val('1').trigger('change.select2');

See this jsfiddle for examples of these. Thanks to @minlare for Solution 2.

Explanation:

Say I have a best friend select with people's names. So Bob, Bill and John (in this example I assume the Value is the same as the name). First I initialize select2 on my select:

$('#my-best-friend').select2();

Now I manually select Bob in the browser. Next Bob does something naughty and I don't like him anymore. So the system unselects Bob for me:

$('#my-best-friend').val('').trigger('change');

Or say I make the system select the next in the list instead of Bob:

// I have assume you can write code to select the next guy in the list
$('#my-best-friend').val('Bill').trigger('change');  

Notes on Select 2 website (see Deprecated and removed methods) that might be useful for others:

.select2('val') The "val" method has been deprecated and will be removed in Select2 4.1. The deprecated method no longer includes the triggerChange parameter.

You should directly call .val on the underlying element instead. If you needed the second parameter (triggerChange), you should also call .trigger("change") on the element.

$('select').val('1').trigger('change'); // instead of $('select').select2('val', '1');