header selector
Description: Selects all elements that are headers, like h1, h2, h3 and so on.
version added: 1.2jQuery( ":header" )
Additional Notes:
- Because
:headeris a jQuery extension and not part of the CSS specification, queries using:headercannot take advantage of the performance boost provided by the native DOMquerySelectorAll()method. To achieve the best performance when using:headerto select elements, first select the elements using a pure CSS
