jquery method to determine if checkbox is selected

Method: 1. Get the checkbox element, and then use the “get(0).checked)” method to judge; 2. Get the element, and then use the “is(‘:checked’)” method to judge; 3. Get the element, and then use “ttr(‘checked’)” method to judge.

Several methods of jQuery to determine whether the checkbox is selected

method one:

 if ($("#checkbox-id")get(0).checked) {     // do something }

Method Two:

 if($('#checkbox-id').is(':checked')) {     // do something }

Method three:

 if ($('#checkbox-id').attr('checked')) {     // do something }

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