<h1>Detect if Element is Visible</h1>
<pre>
<code>
// jQuery selector to get an element
var query = $('#elementId');
// check if element is Visible
var isVisible = query.is(':visible');
if (isVisible === true) {
// element is Visible
} else {
// element is Hidden
}
</code>
</pre>
<h1>Toggle Element Visibility</h1>
<pre>
<code>
// jQuery selector to get element(s)
var query = $('div.className');
// Hide all matching elements
query.hide();
// Display all matching elements
query.show();
</code>
</pre>
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