A hidden paragraph:
The hidden attribute is supported in all major browsers, except Internet Explorer.
The hidden attribute is a boolean attribute.
When present, it specifies that an element is not yet, or is no longer, relevant.
Browsers should not display elements that have the hidden attribute specified.
The hidden attribute is new in HTML5.
In XHTML, attribute minimization is forbidden, and the hidden attribute must be defined as <element hidden="hidden">.
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