JQuery 选择下拉更改事件 - 选择一个默认值
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JQuery select drop down change event - select a default
提问by user1040259
How would I still allow my change event to happen for my drop down while selecting a default value?
在选择默认值时，我如何仍然允许我的下拉列表发生更改事件？
Select value 1 as default, but also have the change function work..
选择值 1 作为默认值，但也有更改功能工作..
<select id='statsGraphingSelect'>
<option value='1' selected="selected">1</option>
<option value='2'>2</option>
<option value='3'>3</option>
<option value='4'>4</option>
</select>
$("#statsGraphingSelect").change(function() {
if ($("#statsGraphingSelect option[value='1']").attr('selected')) {//something happens here }
if ($("#statsGraphingSelect option[value='2']").attr('selected')) {//something happens here }
if ($("#statsGraphingSelect option[value='3']").attr('selected')) {//something happens here }
if ($("#statsGraphingSelect option[value='4']").attr('selected')) {//something happens here }
}
回答by Rafay
i dont know what are you trying to achieve, you can try
我不知道你想达到什么目的，你可以试试
$("#statsGraphingSelect").change(function() {
var n = $(this).val();
switch(n)
{
case '1':
execute code block 1
break;
case '2':
execute code block 2
break;
}
});
now with your given markup if you trigger change in the ready handler like
现在使用给定的标记，如果您在就绪处理程序中触发更改，例如
$(function(){
$("#statsGraphingSelect").change();
});
the case 1will be executed
在case 1将被执行
