Selector hidden
The :hidden selector selects all elements on the page that are hidden. Elements with visibility: hidden or with opacity: 0 are considered visible because they take up space in the layout. Elements can be considered invisible for several reasons: the value of the display CSS property is none, or they are elements with the type="hidden" attribute, or their height or width is set to 0, or their parent element is hidden. Since :hidden is not part of the CSS specification, for better performance in modern browsers it is better to first filter elements using a pure CSS selector and then apply .filter(':hidden'). Tracking element visibility using other methods, such as a class, may provide better performance.
Syntax
This is how we select hidden elements:
$(':hidden');
Example
Let's show the invisible squares by clicking on the button #test:
<button id="test">show</button>
<div></div>
<div style="display:none;"></div>
<div></div>
<div></div>
<div style="display:none;"></div>
div {
width: 40px;
height: 40px;
margin: 5px;
border: 2px outset green;
float: left;
}
$('#test').click(function() {
$('div:hidden').show('slow');
});
