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Callback progression.

Description

The deferred.progress() Deferred method, adds handlers to the Deferred object that are called on progress notification generation.

• Callbacks are executed in the order they were added and each callback is passed the args from the respective method if any were specified.
• When the Deferred generates progress notifications by calling the deferred.notify() or deferred.notifyWith() methods, the progressCallbacks are called.
• Any progressCallbacks added after the Deferred object enters the resolved or rejected state are ignored.

Syntax

Parameters

Return

A Deferred object.

deferred.progress( progressCallbacks ) Example Objects  <<  Top

Add handlers to the Deferred object that are called on progress notification generation.

In the example below when we press the button the first time, we create a Deferred object . We then notify and resolve the Deferred object and process any progressCallbacks and doneCallbacks.

$(function(){
  $('#btn15').one('click', function(){
    var ourDeferred = $.Deferred();
    ourDeferred.progress( eFunc );
    ourDeferred.done( eFunc );
    ourDeferred.notify( 'Our deferred was notified. <br>', '#div1');
    ourDeferred.resolve( 'Our deferred was resolved. <br><br>', '#div1');
  });

  function eFunc( value, div ){
    $(div).append( 'In eFunc: ' + value);
  }
});

Related Tutorials

jQuery Advanced Tutorials - Lesson 7 - The Deferred Object

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