ES6 Vanilla JS中的JQuery BeforeSend相等

Question

Jquery具有语法beforeSend，并且在获取API或JSON时已完成。香草javascript（ES6或ES7）是否提供像beforeSend和Completed这样的语法？还是可以帮助我使用现代javascript在jquery中创建像beforeSend一样的内容？

$.ajax({
type: 'POST',
url: url,
data: data,
beforeSend: function() {
    // setting a timeout
    $(placeholder).addClass('loading');
},
success: function(data) {
    if (append) {
        $(placeholder).append(data);
    } else {
        $(placeholder).html(data);
    }
},
error: function(xhr) { // if error occured
    alert("Error occured.please try again");
    $(placeholder).append(xhr.statusText + xhr.responseText);
    $(placeholder).removeClass('loading');
},
complete: function() {
    $(placeholder).removeClass('loading');
},
dataType: 'html'

}）;