Где в объекте Deferred хранятся функции передоваемые ее методам?

Question

[Garnet_Fox]

Всем привет.

Простите за глупый вопрос, но что-то не могу врубится, сам объект дефферед хранит функцию или нет, и если да то где?

т.е., что имею ввиду:

deff = jQuery.Deferred();
deff.done(function(){
console.log('Где в объекте лежит функция?')
});
console.dir (deff);

Соответственно в консоле получаем объект, так вот, где в методе done лежи функция или ссылка на нее, или в объекте она вообще не хранится?

Answer 1

[Nick Sdk]

done - это и есть метод (он же функция)

Comments

[Garnet_Fox]

так вот, где в методе done лежи функция

Это понятно

Имеется ввиду, что далее, допустим, deff.resolve() изменяет состояние deferred объекта, запускается deff.done(), а дальше что происходит, где лежит содержимое deff.done() - console.log('Где в объекте лежит функция?'), откуда ее дергает deff.done() из объекта deferred или нет?

[Nick Sdk]

Из исходников jQuery

jQuery.Deferred

var _731531622 = jQuery.Deferred;
jQuery.Deferred = function(func) {
var _object = _731531622(func);
intellisense.annotate(_object, {
  'always': function() {
    /// <signature>
    ///   <summary>Add handlers to be called when the Deferred object is either resolved or rejected.</summary>
    ///   <param name="alwaysCallbacks" type="Function">A function, or array of functions, that is called when the Deferred is resolved or rejected.</param>
    ///   <param name="alwaysCallbacks" type="Function">Optional additional functions, or arrays of functions, that are called when the Deferred is resolved or rejected.</param>
    ///   <returns type="Deferred" />
    /// </signature>
  },
  'done': function() {
    /// <signature>
    ///   <summary>Add handlers to be called when the Deferred object is resolved.</summary>
    ///   <param name="doneCallbacks" type="Function">A function, or array of functions, that are called when the Deferred is resolved.</param>
    ///   <param name="doneCallbacks" type="Function">Optional additional functions, or arrays of functions, that are called when the Deferred is resolved.</param>
    ///   <returns type="Deferred" />
    /// </signature>
  },
  'fail': function() {
    /// <signature>
    ///   <summary>Add handlers to be called when the Deferred object is rejected.</summary>
    ///   <param name="failCallbacks" type="Function">A function, or array of functions, that are called when the Deferred is rejected.</param>
    ///   <param name="failCallbacks" type="Function">Optional additional functions, or arrays of functions, that are called when the Deferred is rejected.</param>
    ///   <returns type="Deferred" />
    /// </signature>
  },
  'isRejected': function() {
    /// <summary>Determine whether a Deferred object has been rejected.</summary>
    /// <returns type="Boolean" />
  },
  'isResolved': function() {
    /// <summary>Determine whether a Deferred object has been resolved.</summary>
    /// <returns type="Boolean" />
  },
  'notify': function() {
    /// <signature>
    ///   <summary>Call the progressCallbacks on a Deferred object with the given args.</summary>
    ///   <param name="args" type="Object">Optional arguments that are passed to the progressCallbacks.</param>
    ///   <returns type="Deferred" />
    /// </signature>
  },
  'notifyWith': function() {
    /// <signature>
    ///   <summary>Call the progressCallbacks on a Deferred object with the given context and args.</summary>
    ///   <param name="context" type="Object">Context passed to the progressCallbacks as the this object.</param>
    ///   <param name="args" type="Object">Optional arguments that are passed to the progressCallbacks.</param>
    ///   <returns type="Deferred" />
    /// </signature>
  },
  'pipe': function() {
    /// <signature>
    ///   <summary>Utility method to filter and/or chain Deferreds.</summary>
    ///   <param name="doneFilter" type="Function">An optional function that is called when the Deferred is resolved.</param>
    ///   <param name="failFilter" type="Function">An optional function that is called when the Deferred is rejected.</param>
    ///   <returns type="Promise" />
    /// </signature>
    /// <signature>
    ///   <summary>Utility method to filter and/or chain Deferreds.</summary>
    ///   <param name="doneFilter" type="Function">An optional function that is called when the Deferred is resolved.</param>
    ///   <param name="failFilter" type="Function">An optional function that is called when the Deferred is rejected.</param>
    ///   <param name="progressFilter" type="Function">An optional function that is called when progress notifications are sent to the Deferred.</param>
    ///   <returns type="Promise" />
    /// </signature>
  },
  'progress': function() {
    /// <signature>
    ///   <summary>Add handlers to be called when the Deferred object generates progress notifications.</summary>
    ///   <param name="progressCallbacks" type="Function">A function, or array of functions, that is called when the Deferred generates progress notifications.</param>
    ///   <returns type="Deferred" />
    /// </signature>
  },
  'promise': function() {
    /// <signature>
    ///   <summary>Return a Deferred's Promise object.</summary>
    ///   <param name="target" type="Object">Object onto which the promise methods have to be attached</param>
    ///   <returns type="Promise" />
    /// </signature>
  },
  'reject': function() {
    /// <signature>
    ///   <summary>Reject a Deferred object and call any failCallbacks with the given args.</summary>
    ///   <param name="args" type="Object">Optional arguments that are passed to the failCallbacks.</param>
    ///   <returns type="Deferred" />
    /// </signature>
  },
  'rejectWith': function() {
    /// <signature>
    ///   <summary>Reject a Deferred object and call any failCallbacks with the given context and args.</summary>
    ///   <param name="context" type="Object">Context passed to the failCallbacks as the this object.</param>
    ///   <param name="args" type="Array">An optional array of arguments that are passed to the failCallbacks.</param>
    ///   <returns type="Deferred" />
    /// </signature>
  },
  'resolve': function() {
    /// <signature>
    ///   <summary>Resolve a Deferred object and call any doneCallbacks with the given args.</summary>
    ///   <param name="args" type="Object">Optional arguments that are passed to the doneCallbacks.</param>
    ///   <returns type="Deferred" />
    /// </signature>
  },
  'resolveWith': function() {
    /// <signature>
    ///   <summary>Resolve a Deferred object and call any doneCallbacks with the given context and args.</summary>
    ///   <param name="context" type="Object">Context passed to the doneCallbacks as the this object.</param>
    ///   <param name="args" type="Array">An optional array of arguments that are passed to the doneCallbacks.</param>
    ///   <returns type="Deferred" />
    /// </signature>
  },
  'state': function() {
    /// <summary>Determine the current state of a Deferred object.</summary>
    /// <returns type="String" />
  },
  'then': function() {
    /// <signature>
    ///   <summary>Add handlers to be called when the Deferred object is resolved, rejected, or still in progress.</summary>
    ///   <param name="doneFilter" type="Function">A function that is called when the Deferred is resolved.</param>
    ///   <param name="failFilter" type="Function">An optional function that is called when the Deferred is rejected.</param>
    ///   <param name="progressFilter" type="Function">An optional function that is called when progress notifications are sent to the Deferred.</param>
    ///   <returns type="Promise" />
    /// </signature>
    /// <signature>
    ///   <summary>Add handlers to be called when the Deferred object is resolved, rejected, or still in progress.</summary>
    ///   <param name="doneCallbacks" type="Function">A function, or array of functions, called when the Deferred is resolved.</param>
    ///   <param name="failCallbacks" type="Function">A function, or array of functions, called when the Deferred is rejected.</param>
    ///   <returns type="Promise" />
    /// </signature>
    /// <signature>
    ///   <summary>Add handlers to be called when the Deferred object is resolved, rejected, or still in progress.</summary>
    ///   <param name="doneCallbacks" type="Function">A function, or array of functions, called when the Deferred is resolved.</param>
    ///   <param name="failCallbacks" type="Function">A function, or array of functions, called when the Deferred is rejected.</param>
    ///   <param name="progressCallbacks" type="Function">A function, or array of functions, called when the Deferred notifies progress.</param>
    ///   <returns type="Promise" />
    /// </signature>
  },
});

return _object;
};

[Nick Sdk]

Garnet_Fox, когда делаем
var deff = jQuery.Deferred();

то в переменную deff записывается объект с методами

[Nick Sdk]

Garnet_Fox,

deff.done() - console.log('Где в объекте лежит функция?'), откуда ее дергает deff.done() из объекта deferred или нет?

В done вы, по сути, уже сами записываете свою функцию
а сам done, как я понимаю, срабатывает при успешном выполнении
т.е., когда срабатывает событие "успешного выполнения"

[Garnet_Fox]

В done вы, по сути, уже сами записываете свою функцию

Именно, но я не могу найти в методе done свою функцию, я ее записываю, но после манипуляций, console.dir(deff), выведет объект deferred с методами и свойствами, соответственно там есть метод done, но в нем нет упоминания console.log('Где в объекте лежит функция?')....

[Nick Sdk]

Garnet_Fox, тут правильнее сказать, что мы не записываем в done свою функцию, а отправляем ее, как агрумент и она [функция] записывается "куда-то" :)
пока еще не докопался куда именно

[Garnet_Fox]

Согласен, вот и мне этот момент не понятен.
Хочется глазом отличить один объект deferred от другого, а не получается (