Borrowing from CSS 1â3, and then adding its own, jQuery offers a powerful set of tools for matching a set of elements in a document. 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 cont
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