Imitate changing select option by user

Question

I'm trying to deal with one userscript user may have installed when he visits my site. As it works in a sandbox, I can't directly turn off some of the userscript's features that interfere with my site's native functionality. So the only option for me is to access them though the UI. First I needed to change one particular checkbox. First I tried to use jQuery's .val() method but it did not work. Then I did this:

if($('#someinput:checked').length) $('#someinput')[0].click();

And then it worked, the unwanted feature got turned off. Next one was <select>. Just .val() did'n help as expected, so I also triggered the change event right after I changed the value:

$('select[name=someselect]').val(0);
$('select[name=someselect]')[0].change();

But it still does not work. I guess I need to trigger change event somehow more properly. How do I do that?

`$('#someinput)[0].click();` is missing a closing quote, are you sure it worked ? — Gaurang Tandon, Mar 28 '14 at 08:11

Felix · Answer 1 · 2014-03-28T08:15:34.987

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You need to use:

$('select[name="someselect"]').change();

instead of:

$('select[name=someselect]')[0].change();

because $('select[name=someselect]')[0] return a DOM element, not a jQuery object.

edited Mar 28 '14 at 08:15

answered Mar 28 '14 at 08:09

Felix

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I don't get what you means. Can you rephrase it? – Felix Mar 28 '14 at 08:18
Sorry, I just tested that again and found out that with checkbox both `$('#someinput')[0].click();` and `$('#someinput').click();` worked. Still `$('select[name="someselect"]').change();` doesn't. – Juribiyan Mar 28 '14 at 08:22

score 0 · Accepted Answer · edited May 23 '17 at 12:05

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I found a solution here on SO:

Basically as far as I understand it fires all the native events properly and it's neatly wrapped into a jQuery plugin.

edited May 23 '17 at 12:05

Community

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answered Mar 28 '14 at 09:01

Juribiyan

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Imitate changing select option by user

2 Answers2