如何在.ajax成功回调中使用外部变量？

Question

我有这段代码：

    var pType = "foo"

    $.ajax({
        type: "GET",
        url: "/active_list?sort=id&order=asc&limit=1000&offset=0",
        beforeSend: function (xhr) {
            xhr.setRequestHeader("Authorization", "Bearer " + token);
        },
        success: function (data) {
           console.log(pType);
        },
        statusCode: {
          ....
        },
        error: function (XMLHttpRequest, textStatus, errorThrown) {
           .....
        },
        dataType: "json",
        contentType: "application/json"
    });

我console.log(pType);没有返回foo

的问题

如何实现它？