check the similarity between 2 values ​​in the array.

check.js

// Set Array
var idAdd = [];

// Push value to array
$('.single-box:checked').map(function () {
    var vl = $(this).val();
    idAdd.push(vl);
});

// check the array address have same value or not
$chckAdd = idAdd.every((val, i, arr) => val === arr[0]);

// Catch it !!
if ($chckAdd === false) {
    swal({
      title: "Error",
      text: "Tidak boleh berbeda!",
      type: "error",
      showCancelButton: false,
      confirmButtonText: "Ok",
  }).then(result => {
      if(result.value) $('.check').prop('checked', false);
    });
}