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Lets say I want to process some tasks in the synchronous manner, so I have this function: function executePromiseQueueSync(queue){ var seed = $.Deferred(), finalPromise; finalPromise = _.reduce(queue, function(memo, promise){ return memo.then(function(){ return promise.funct.apply(null, promise.argmnt); }); }, seed.promise()); seed.resolve(); return finalPromise; } Now I can use it to process some files: _.each(fileList, function(element, index, list){ _.each(element, function(el, idx, lst){ promisesQueue.push({funct: processFile, argmnt:[el, index + (len - fileList.length) ,len]}); }); }); Execute it and indicate a progress: executePromiseQueueSync(promisesQueue).then(function(){ .... }, function(){ .... }).progress(function(msg, progress, name, index, status, desc){ console.log('progress'); }); Process function itself looks like this: function processFile(file, index, size) { var dfd = new jQuery.Deferred(); if (file.name.match('(.*)\\.jpg')) ... else if ... else $.when(processWrongFileType(file)).then(function(){ dfd.notify(...); dfd.resolve(); }); return dfd.promise(); } as you see there is nothing much to do when the file has a wrong type: So sometimes I would like to execute synchronous code just like a promise: function processWrongFileType(){ var dfd = new jQuery.Deferred(); dfd.resolve(); console.log("blah"); return dfd.promise(); } The problem is if processWrongFileType will be executed, notify will not work. If I change processWrongFileType to look like this: function processWrongFileType() { var dfd = new jQuery.Deferred(); setTimeout(function(){dfd.resolve();},1); return d

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