get the values of checked checkboxes jquery 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: get value of all checked boxes jquery

var values = $('input[name=grepperRocks]:checked')
               .map(() => { return this.value }).get();

Example 3: jquery get selected checkboxes

var selected = [];
$('#checkboxes input:checked').each(function() {
    selected.push($(this).attr('name'));
});

Example 4: is checked checkbox jquery

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