password selector
Description: Selects all elements of type password.
- version added: 1.0jQuery( ":password" )
$( ":password" ) is equivalent to $( "[type=password]" ). As with other pseudo-class selectors (those that begin with a ":") it is recommended to precede it with a tag name or some other selector; otherwise, the universal selector ( "*" ) is implied. In other words, the bare $( ":password" ) is equivalent to $( "*:password" ), so $( "input:password" ) should be used instead. 
Additional Notes:
- 
			Because :passwordis a jQuery extension and not part of the CSS specification, queries using:passwordcannot take advantage of the performance boost provided by the native DOMquerySelectorAll()method. For better performance in modern browsers, use[type="password"]instead.
Example:
Finds all password inputs.
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