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Questions tagged [jquery-deferred]

jQuery's deferred (also known as promises and futures) can be used to manage callback queues

jQuery.Deferred(), introduced in version 1.5, is a chainable utility object that can register multiple callbacks into callback queues, invoke callback queues, and relay the success or failure state of any synchronous or asynchronous function.

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jQuery jqXHR - cancel chained calls, trigger error chain

I am creating a ajax utility for interfacing with my server methods. I would like to leverage jQuery 1.5+ deferred methods from the object returned from the jQuery.ajax() call. The situation is following. The serverside method always returns a JSON…
m0sa
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Is it possible to reset a jQuery deferred object state?

Is it possible to reset a resolved jQuery object to an 'unresolved' state and kick off it's initialization and callbacks all over again? The specific thing I'm doing is that I have a jQuery deferred wrapper over the local file system api. From there…
George Mauer
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Deferred/Promise pattern in C++

I've recently discovered, and fallen in love with, the Deferred/Promise pattern used in jQuery. It just encapsulates so many async use cases, including the wonderful chaining, filtering ability, that I can't believe I missed it for so long. I've…
Shane
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How to use jQuery's deferred object with custom javascript objects?

I have a standard javascript object whose prototype is extended with a .start() method taking 2 callbacks as arguments: success and failure respectively. This method performs some asynchronous processing (it's not AJAX) and depending on the result…
Darin Dimitrov
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javascript function wait until another function to finish

I have two javascript functions that are called from android. After long debug sessions finally I realized that the problem is arising from the fact that second function is getting called before first one is finished. I already searched the examples…
tugce
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jquery custom deferred functions

I have three functions i'm trying to run, the first two are doing some async stuff that need data for the third to use. I want the third function to fire only when 1 and 2 are both done. this is the general structure but the final function is firing…
Brian
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jQuery deferred : use to delay return of function until async call within function complete + get return value

How can I correctly use jQuery deferreds to delay return of function until async call within function complete + get return value? This is my current code: function getFields(page) { var dff = $.Deferred(); result = {}; $.ajax( //the async…
bguiz
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IcedCoffeeScript or jQuery deferred

Recently while working on a Backbone.JS/jQuery/CoffeeScript project, I found myself in a mess of callback and timing issues. I needed to wait for something to complete before proceeding and found myself in a mess of nested callbacks ... which is…
Jiew Meng
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Javascript Promise vs jQuery Deferred

What are the pros & cons of Javascript Promises vs jQuery Deferred Objects? For example, what issues do they each have, if any? A fellow stack overflow member stated: "...real promises are real, and fake promises are fake." What did he mean by…
picokol
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jQuery.when() progress for array of Deferred and/or Promise

I'm using jQuery's .when() to wrap an array of promises so that I can do some action when all promises have been resolved. $.when.apply($, requests).done(function () { console.log(arguments); //it is an array like object which can be looped …
Brad
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Is any jQuery version compliant to Promise/A specifications?

After going through several articles I have come to know that promise implementation is there in jQuery. But I am not sure whether any version of jQuery is Promise/A compliant or not.
Pulak Kanti Bhattacharyya
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jQuery Waiting for Multiple Events to fire

Is it possible to "wait" for multiple events before executing a function? I know its possible with jQuery deferred obejcts to use $.when to wait for two promises to resolve but I wondered if its possible with just plain old events? Lets say a…
Jon Wells
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Chain of Jquery Promises

I have a simple chain of events: Get Columns from a metaData table (async) load selected columns (async) render list I used to just the chain these functions, each calling the next when it had completed. However, its not very obvious what's…
Jon Wells
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Throwing an Error in jQuery's Deferred object

I have an $.ajax promise and want to check whether my (syntactically valid) response contains an error, triggering the rejected status in that case. I have worked with my own promise library which deals such tasks easily. I do not really like…
Bergi
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Chaining ajax requests with jQuery's deferred

I have a web app which must call the server multiple times. So far, I had a long nested callback chain; but I would like to use jQuery's when,then etc. functionality. However, I can't seem to get stuff running again after using a then. $ .when…
Anteru
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