Set select option 'selected', by value

Question

I have a select field with some options in it. Now I need to select one of those options with jQuery. But how can I do that when I only know the

Answer 1

It's better to use change() after setting select value.

$("div.id_100 select").val("val2").change();

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By doing this, the code will close to changing select by user, the explanation is included in JS Fiddle:

JS Fiddle