有没有办法在关闭模式之前将信息保存到mysql（在计时器4秒内）而不使用提交按钮

When the modal opens automatically a textbox has a data or info. I want to save that to mysql before the modal closes or after it closes without using a submit button. Is there a way to do this using jquery i suppose?

Im using laravel, resource controller feature

here is my code with button

$('#student_form').on('submit', function(event){
        event.preventDefault();
        var form_data = $(this).serialize();
        $.ajax({
            url:"{{ route('ajaxdata.postdata') }}",
            method:"POST",
            data:form_data,
            dataType:"json",
            success:function(data)
            {
                if(data.error.length > 0)
                {
                    var error_html = '';
                    for(var count = 0; count < data.error.length; count++)
                    {
                        error_html += '<div class="alert alert-danger">'+data.error[count]+'</div>';
                    }
                    $('#form_output').html(error_html);
                }
                else
                {
                    $('#form_output').html(data.success);
                    $('#student_form')[0].reset();
                    $('#action').val('Add');
                    $('.modal-title').text('Add Data');
                    $('#button_action').val('insert');
                    $('#student_table').DataTable().ajax.reload();
                }
            }
        })
    });

});

you can do this by hooking up to the modal event in bootstrap.try this out,

$('#youModalId').on('hidden.bs.modal', function (e) {
  // get the value from the input box
  // make the ajax call here
})

for more information go to this link