jquery - 伪类 :empty and :not(:empty) - make it hide() and show() regarding content (jquery, mvc 5, asp.net, css)

Question

我遇到了 :empty 和 :not(:empty)(jquery, mvc 5, asp.net, css) 的问题。 我的目标是仅在出现“需要街道字段”之类的文本时才显示错误消息。否则让它消失。 它仅部分起作用。

在服务器端它看起来像:

<div class="BWForm_form-group">
    <div class="col-md-4 BWTextLeft">
        @Html.BWLabelFor(model => model.street, new { @class = "BWLabel" })
        <b>/</b>
        @Html.BWLabelFor(model => model.streetNo, new { @class = "BWLabel" })
    </div>
    <div class="col-md-8">
        <div class="col-md-9 BWPaddingRight">
            @Html.EditorFor(model => model.street, new { @class = "BWForm_form-control BWTextBox" })
        </div>
        <div class="col-md-3 BWPaddingLeft">
            @Html.EditorFor(model => model.streetNo, new { @class = "BWForm_form-control BWTextBox" })
        </div>
    </div>
    <div class="clearfix"></div>
    <div class="col-md-offset-4 col-md-8">

            @Html.ValidationMessageFor(model => model.street)
            @Html.ValidationMessageFor(model => model.streetNo)

    </div>
</div>

我的问题的相关部分只是“@Html.ValidationMessageFor(model => model.street)”，这将导致原始 HTML 看起来像(只有相关代码):

<span class="field-validation-valid" data-valmsg-replace="true" data-valmsg-for="receiverAddress.street"></span>

如果发生错误(发送表单和检测错误时)，将显示以下 HTML(之前的(“原始 HTML”)html 将被完全替换):

<span class="field-validation-error" data-valmsg-replace="true" data-valmsg-for="receiverAddress.street">
<span class="" for="receiverAddress_street">The Street field is required.</span>
</span

我的想法是这样做(它有效):

 $('span.field-validation-error:empty').hide();
 $('span.field-validation-valid:empty').hide();

但我想再次重新显示它(这不起作用):

$('span.field-validation-error:not(:empty)').show(100);
$('span.field-validation-valid:not(:empty)').show(100);

Html 看起来仍然像(style="display: none;"它仍然被禁用):

<span class="field-validation-error" data-valmsg-replace="true" data-valmsg-for="receiverAddress.street" style="display: none;">

    <span class="" for="receiverAddress_street">

        The Street field is required.

    </span>

</span>

但是我该怎么做才能再次显示它，为什么它不起作用？

感谢您的帮助。 马丁

(更新:添加了附加信息)

Answer 1

试试这个(模式)

已更新

$(function () {
  $("span[class^=field-validation]")
  .each(function (i, el) {
    if ( $(el).text().length > 1 ) {
      $(el).css("display", "block")
    };
  });
});

jsfiddle http://jsfiddle.net/guest271314/tF2YJ/