jQuery-将值附加到INPUT，使其保持逗号分隔列表 [英] jQuery - Append a Value to a INPUT, keeping it a Comma Delimited list

问题描述

我的输入如下:

<input type="hidden" id="attachment-uuids" value="">

我希望能够在不同的时间向输入添加值:

I'd like to be able to append a value to the Input, at different times:

$('#attachment-uuids).val('55555');

导致:

<input type="hidden" id="attachment-uuids" value="55555">

但是然后做:

$('#attachment-uuids).val('66666');

导致:

<input type="hidden" id="attachment-uuids" value="66666">

我想要以下内容:

<input type="hidden" id="attachment-uuids" value="55555, 66666">

当值为空且值不为空时如何用逗号分隔列表附加值?

how can I append values when the value is empty and when the value is not empty with a comma delimited list?

谢谢

推荐答案

$('#attachment-uuids').val(function(i,val) { 
     return val + (!val ? '' : ', ') + '66666';
});

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编辑:正如 @mkoryak 所述，我正在对val在条件运算符中.不用!可以将其重写为:

---

As @mkoryak noted, I'm doing an unnecessary negation of val in the conditional operator. It could be rewritten without the ! as:

(val ? ', ' : '')

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