how to get selected checkbox value in jquery code example

Example 1: get value of selected checkbox jquery

$('#checkbox_id:checked').val();
//if checkbox is selected than gets its value

Example 2: jquery get selected checkboxes

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

Example 3: get value of checked checkboxes jquery

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