获取未捕获错误:语法错误,无法识别的表达式 [英] Getting Uncaught Error: Syntax error, unrecognized expression
问题描述
我正在尝试从下面粘贴的HTML中获取 Contact_LastName
的值,但是我收到以下错误
I am trying get the value of Contact_LastName
from the HTML pasted below but I am getting the following error
Uncaught Error: Syntax error, unrecognized expression: div #u1@g.com
Javascript:
Javascript :
$('.rdContact').off("click").on("click", function (e) {
e.preventDefault();
$(this).next("div").toggle();
$('.btn-success').off('click').on('click', function (e) {
e.preventDefault();
var divId = $(this).closest('div').parent().attr('id');
var lnameval = $("div #"+ divId).closest('#Contact_LastName').val();
alert(lnameval);
});
});
HTML:
<input type="radio" class="rdContact" name="ContactGroup" value="u1@g.com" style="">
<div class="row" id="u1g.com" style="display: none;">
<div class="col-md-6">
<div class="form-group">
<div class="col-md-3 control-label">
<label>Last Name:</label>
</div>
<div class="col-md-3">
<input class="form-control pr_input defaultText quiet reqrd" id="Contact_LastName" maxlength="50" name="ContactLastName" type="text" value="">
</div>
</div>
</div>
<div class="col-md-6">
<div class="form-group">
<div class="col-md-3 control-label">
<label>First Name:</label>
</div>
<div class="col-md-3">
<input class="form-control defaultText quiet reqrd" id="Contact_FirstName" maxlength="50" name="ContactFirstName" type="text" value="">
</div>
</div>
</div>
<div class="modal-footer">
<input type="button" value="Add Contact" id="btnSaveContact" class="btn btn-success">
<input type="button" value="Cancel" id="btnCancelContact" class="btn btn-default">
</div>
</div>
推荐答案
这种情况正在发生,因为 u1 @ g.com
不是元素ID的有效值,因此jQuery无法解析您的选择器。
This is happening because u1@g.com
is not a valid value for an element's ID, so jQuery is unable to parse your selector.
来自 HTML4规范:
ID和NAME令牌必须以字母([A-Za-z])开头,后面可以跟任意数量的字母,数字([0- 9]),连字符( - ),下划线(_),冒号(:)和句号(。)。
ID and NAME tokens must begin with a letter ([A-Za-z]) and may be followed by any number of letters, digits ([0-9]), hyphens ("-"), underscores ("_"), colons (":"), and periods (".").
解决方案是为您的ID使用有效值。
The solution is to use a valid value for your ID.
Re:你的评论如下,你得到 undefined
因为您使用的是 nearest()
错误(请点击该链接查找出什么最近()
实际上是这样做的。
Re: your comment below, you are getting undefined
because you are using closest()
wrong (please follow that link to find out what closest()
actually does).
我愿意打赌你有 id
Contact_LastName
在您网页的多个位置,这是一个大问题,因为ID必须是唯一的。
I'm willing to bet that you have the id
Contact_LastName
in multiple places in your page, and that is a big problem because ids have to be unique.
我也很好奇为什么你选择行
div并检索它的ID,这样你就可以了使用该ID在下一行重新选择它。
I am also very curious why you are selecting the row
div and retrieving its ID, just so that you can use that ID to re-select it in the next line.
取代您当前的方法,删除重复的ID并使用它:
Instead of your current approach, get rid of your duplicate IDs and use this:
$('.btn-success').off('click').on('click', function (e) {
e.preventDefault();
var row = $(this).closest(".row");
var lnameval = row.find("input[name='ContactLastName']").val();
alert(lnameval);
});
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