jquery check box checked code example

Example 1: How to check whether a checkbox is checked in 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
}

Example 2: jQuery check a radio button

// jQuery version 1.6 or above use:  
$("#myRadioID").prop("checked", true);
 
//jQuery versions below 1.6 use:
$("#myRadioID").attr('checked', 'checked');

Example 3: jquery checkbox checked

$("checkbox").is(":checked")

Example 4: checkbox is checked jquery

$(your_checkbox).is(':checked');

Example 5: jquery see if checkbox is checked

$('input.checkbox').is(':checked')

Example 6: is checked checkbox jquery

$('#' + id).is(":checked")