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A free scan shows the junk files, broken settings and background clutter dragging Windows down - then fixes them in one click.Free scan · Windows 10 & 11Use jQuery’s .hasClass() method and pass the class name without a leading dot:
if ($('#myElement').hasClass('active')) {
// The selected element has the "active" class.
}How .hasClass() works
.hasClass(className) returns true if at least one element in the selected jQuery collection has the specified class; otherwise it returns false. Pass the class name as a string, without the CSS selector’s leading period.
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const hasActiveClass = $('#myElement').hasClass('active');That makes it useful in an if condition or anywhere else a Boolean result is needed.
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Select the element with jQuery, then call .hasClass() with the class name:
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if ($('#myElement').hasClass('active')) {
$('#myElement').text('Active');
} else {
$('#myElement').text('Inactive');
}The selector identifies the element; 'active' is the class being checked. Do not write .hasClass('.active'): the argument is a class name, not a CSS selector.
Check a collection of elements
If the jQuery selection matches multiple elements, .hasClass() returns true when any one of them has the class. It does not mean every matched element has it.
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if ($('.item').hasClass('selected')) {
// At least one .item is selected.
}To test each matched element individually, call the method on each element in an iteration:
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$('.item').each(function () {
if ($(this).hasClass('selected')) {
// This particular item is selected.
}
});Common mistakes
- Including a leading period: use
.hasClass('active'), not.hasClass('.active'). - Assuming all matches have the class: for a collection, a true result means at least one matched element has it.
- Checking an empty selection: if the selector matches no elements,
.hasClass()returnsfalse.
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