我有一个DOM元素，其ID类似于:
something[500]
它是由我的Ruby on Rails应用程序构建的.我需要能够通过jQuery获取这个元素，这样我就可以遍历DOM，删除它的父元素的父元素，它有一个我事先无法访问的变量ID.
有人知道我该怎么做吗？以下代码似乎不起作用:
alert($("#something["+id+"]").parent().parent().attr("id"));
经进一步判断，以下各项:
$("#something["+id+"]")
返回一个对象，但当我在其上运行".html()"或".text()"时，结果总是空的或只是一个空字符串.
您需要对方括号进行转义，这样它们才不会被算作属性 Select 器.试试这个:
alert($("#something\\["+id+"\\]").parent().parent().attr("id"));
See Special Characters In Selectors, specifically the second paragraph:
To use any of the meta-characters (such as
!"#$%&'()*+,./:;<=>?@[\]^``{|}~) as a literal part of a name, it must be escaped with with two backslashes:\\. For example, an element withid="foo.bar", can use the selector$("#foo\\.bar"). The W3C CSS specification contains the complete set of rules regarding valid CSS selectors. Also useful is the blog entry by Mathias Bynens on CSS character escape sequences for identifiers.