if checkbox is checked get all value jquery code example

Example 1: get value of all checked boxes jquery

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

Example 2: jquery check if all checkbox is not checked

$('#checkAll').click(function () {    
     $('input:checkbox').prop('checked', this.checked);    
 });