Post input array to Laravel PHP server by jQuery

Website:

<div><input type="checkbox" name="List[]" value="1"></div>
<div><input type="checkbox" name="List[]" value="2"></div>
<div><input type="checkbox" name="List[]" value="3"></div>

js code:

    var valArr= [];
    $('input:checkbox[name^="List[]"]:checked').each(function(){
        valArr.push($(this).val());
    });
    valArr = JSON.stringify(valArr);
    $.post(<YOUR SERVER URL>,
    {
        type: 'post',
        data: valArr,
    });

PHP server:

$list = json_decode($request->data, true);
var_dump($list);