javascript - 当元素的类或 ID 包含点时，无法显示该元素

Question

我必须有包含点的类，但是 jQuery 不起作用。我应该怎么办？示例:http://jsfiddle.net/9KYmx/

<div style="display: none" class="dfv.png">
    text
</div>
$(document).ready(function() {
    $('.dfv.png').show();
})

附注ID 也不起作用。

Answer 1

你需要逃离他们。来自 the manual:

If you wish to use any of the meta-characters 
( such as !"#$%&'()*+,./:;<=>?@[\]^`{|}~ ) as a 
literal part of a name, you must escape the character 
with two backslashes: \\. For example, if you have an 
element with id="foo.bar", 
you can use the selector $("#foo\\.bar").