How to define jquery selector valid id?

Question

I am using following jquery selector by id

$("#rs_0.01").val();

So my small question is: this valid or not ? As it's not working in my case.

Answer 1

Check documentation of jQuery Selectors

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 with id="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.

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So you can use

$("#rs_0\\.01").val();

or use attribute equals selector instead

$("[id='rs_0.01']").val();

Answer 2

In your case you got few ways to retrieve value of a textbox by using id selector with the same name which you have specified in the question..

One way is by doing like this:

$("[id='rs_0.01']").val();

or you can use the escape sequence inbetween the selector name like this:

$("#rs_0\\.01").val();

Answer 3

Use: You need to escape special chars:

$("#rs_0\\.01").val();