javascript 如何选择 jQuery 下拉 val() 并触发事件？
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How to select jQuery drop down val() AND trigger the event?
提问by TruMan1
I have a jQuery plugin registered on a drop down like this:
我在下拉列表中注册了一个 jQuery 插件，如下所示：
$('#country').linkToStates('#province');
I am manually selecting the drop down like this:
我手动选择这样的下拉菜单：
$('#country').val('United States');
But the onchange event is not triggering .linkToStates() which was registered before it. So it looks like val() only changes the drop down position but doesn't actually change the onchange event. Can anyone help?
但是 onchange 事件不会触发在它之前注册的 .linkToStates() 。所以看起来 val() 只改变了下拉位置，但实际上并没有改变 onchange 事件。任何人都可以帮忙吗？
BTW, this is the code of the registered if it helps:
顺便说一句，如果有帮助，这是注册的代码：
$.fn.extend({
linkToStates: function(state_select_id) {
$(this).change(function() {
var country = $(this).attr('value');
$(state_select_id).removeOption(/.*/);
switch (country) {
case 'Canada':
$(state_select_id).addOption(canadian_provinces, false);
break;
case 'United States':
$(state_select_id).addOption(us_states, false);
break;
default:
$(state_select_id).addOption({ '' : 'Please select a Country'}, false);
break;
}
});
}
});
回答by Hari Pachuveetil
回答by Thomas Shields
You could just put your onchanged code into a separate function and then call it after you change the value.
您可以将 onchanged 代码放入单独的函数中，然后在更改值后调用它。
