jQuery - 将值附加到 INPUT，使其保持逗号分隔列表
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jQuery - Append a Value to a INPUT, keeping it a Comma Delimited list
提问by AnApprentice
I have an input like follows:
我有如下输入：
<input type="hidden" id="attachment-uuids" value="">
I'd like to be able to append a value to the Input, at different times:
我希望能够在不同的时间向输入附加一个值：
$('#attachment-uuids).val('55555');
results in:
结果是：
<input type="hidden" id="attachment-uuids" value="55555">
But then doing:
但是然后做：
$('#attachment-uuids).val('66666');
results in:
结果是：
<input type="hidden" id="attachment-uuids" value="66666">
Where I'd like the following:
我想要以下内容：
<input type="hidden" id="attachment-uuids" value="55555, 66666">
how can I append values when the value is empty and when the value is not empty with a comma delimited list?
当值为空且值不为空时，如何使用逗号分隔列表附加值？
Thanks
谢谢
回答by user113716
$('#attachment-uuids').val(function(i,val) {
return val + (!val ? '' : ', ') + '66666';
});
EDIT:As @mkoryaknoted, I'm doing an unnecessary negation of valin the conditional operator. It could be rewritten without the !as:
编辑：正如@mkoryak 所指出的，我val在条件运算符中做了一个不必要的否定。它可以在没有!as 的情况下重写：
(val ? ', ' : '')
回答by Aaron Hathaway
Just add a conditional when you add the value to the field.
只需在将值添加到字段时添加条件即可。
var cur_val = $('#attachment-uuids').val();
if(cur_val)
$('#attachment-uuids').val(cur_val + "," + new_val);
else
$('#attachment-uuids').val(new_val);
回答by roni
Append won't work for input. But you can use:
附加不适用于输入。但是你可以使用：
$("#txt1").get(0).value+="+";
回答by user1973805
I believe the .append()function is exactly for this purpose. I just tried:
我相信该.append()功能正是为此目的。我刚试过：
$("#attachment-uuids").append(new_val);
to append values to a field. This works and "attachment-uuids" is populated with CSVs, as required.
将值附加到字段。这有效，并且“attachment-uuids”根据需要填充了 CSV。
