With jQuery, how do I test whether an element has a particular class?

The jQuery .hasClass() method checks if at least one of the selected elements have a given class name:

<div id="myId" class="selected"></div>

// true
$('#myId').hasClass('selected')

// false
$('#myId').hasClass('non-existing')

The jQuery .hasClass() method checks if at least one of the selected elements have a given class name:

<div id="myId" class="selected"></div>

// true
$('#myId').hasClass('selected')

// false
$('#myId').hasClass('selection')

The jQuery .hasClass() method checks if any of the selected elements have a given class name:

<div id="myId" class="selected"></div>

// TRUE
$('#myId').hasClass('selected')

// FALSE
$('#myId').hasClass('selection')

The jQuery .hasClass() method checks if any of the selected elements have a given class name: