JAVASCRIPT

check if checkbox is checked jquery

//using plane javascript 
if(document.getElementById('on_or_off_checkbox').checked) {
    //I am checked
} 

//using jQuery
if($('#on_or_off_checkbox').is(':checked')){
    //I am checked
}

jquery if checkbox checked

$( "SELECTOR" ).attr( "checked" )  // Returns ‘true’ if present on the element, returns undefined if not present
$( "SELECTOR" ).prop( "checked" ) // Returns true if checked, false if unchecked.
$( "SELECTOR" ).is( ":checked" ) // Returns true if checked, false if unchecked.

check a checkbox jquery

$('#grepperRocks').prop('checked', true);

check whether a checkbox is checked in jQuery

if ($('#grepperRocks').is(':checked')) {
	// this checkbox is checked
}

check if a checkbox is checked jquery

if($('#checkboxID').is(':checked')){ return true; }

jquery check if type is checkbox

$('#myinput').is(':checkbox')

jquery check checkbox

$('.myCheckbox').attr('checked',true) //Standards compliant

check checkbox by jquery

$('.myCheckbox')[0].checked = true;
$('.myCheckbox')[0].checked = false;

how to check checkbox using jquery

$('#chkbox').click();

check if checkbox is checked jquery

var $boxes = $('input[name=thename]:checked');