[him]

arr = new Map (JSON.parse(localStorage.name || "[]"));
let form=JSON.stringify([...arr]);

  $.ajax({
    type: "POST",
    url: "get.php",
	data: form,
    dataType: "html",
    cache: false,
    success: function(data) {
      console.log(data);
    }
  });

$dataObject = $_POST;
print_r($dataObject);
$a=json_decode($dataObject);
print_r($a);

Не момогает ..