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"backbone.js from DocumentCloud is a small (2KB, packed) open-source library which allows you to apply the MVC (Model-View-Controller) principle to your JavaScript applications. Backbone supplies structure to JavaScript-heavy applications by providing models key-value binding and custom events, collections with a rich API of enumerable functions, views with declarative event handling, and connects it all to your existing application over a RESTful JSON interface."

"Lately, I have been playing with few JavaScript frameworks and in today's modern web applications it is very common that we are including tons of JavaScript files in our application. One of the thing that plays important role in application performance is how fast these script files are delivered into the browsers. I have extensively blogged on combining, compression and caching of JavaScript files in my old blog, in this post I will show you, how you can achieve parallelism in delivering the scripts in the browser with the Head JS library. If you do not know what parallel script downloading is and how does it impact on page speed, then I would suggest to read this article of the YSlow creator. In short, when a browser encounters a script tag in a page it halts its rending until it downloads the script file, the parallelism is actually archived by adding the script dynamically or by XHR depending upon the browser it is running."

Jasmine is a behavior-driven development framework for testing your JavaScript code. It does not depend on any other JavaScript frameworks. It does not require a DOM. And it has a clean, obvious syntax so that you can easily write tests.

The goal of JsTestDriver is to build a JavaScript test runner which: easily integrates with continuous builds systems andallows running tests on multiple browsers quickly to ease TDD style development.

"Optimizing application performance is a key element for business. There are several ways by which we can optimize the applications performance. It can be done either by server side code optimization, caching or some client side optimization. In this post I am going to discuss about one handy and smart way to optimize web applications performance using Bundling and Minification features which is introduced with ASP.NET 4.5 Developer Preview. ASP.NET 4.5 Developer Preview introduced bundling, which combines multiple JavaScript files for faster loading with less number of requests for download and minification, which reduces the size of JavaScript and CSS files by removing unneeded characters . Combination of these bundling and minification helps web pages to load very faster. Let's have a looks how it works."

Free jQuery and JavaScript training.

"Super Simple Auto Spriting, Minification and Bundling solution No need to tell RequestReduce where your resources are Your CSS and Javascript can be anywhere - even on an external host RequestReduce finds them at runtime automatically"

Alternative AJAX frontend for Asp.Net MVC applications

Simplify dynamic JavaScript UIs by applying the Model-View-View Model (MVVM) pattern.

This is some awesome out of the box thinking!

MVC?

(Not strictly speaking ASP.Net MVC, but very relevant to MVC sites too.) "Mayday detects changes in users behaviour, validation and javascript errors providing insights into users experience & what problems happen."

"Deferreds, new in jQuery 1.5, decouple logic dependent on the outcome of a task from the task itself. They're nothing new to the JavaScript scene; Mochikit and Dojo have implemented them for some time, but with Julian Aubourg's AJAX rewrite landing in 1.5, deferreds in jQuery was the logical next step. With deferreds, multiple callbacks can be bound to a task's outcome, and any of these callbacks can be bound even after the task is complete. The task in question may be asynchronous, but not necessarily. "

"SignalR offers a simple and clean API to write real time web applications where the server needs to continuously push data to clients. Common applications are chat, news feed, notifications, multiplayer games. In this sample, I demonstrate powerful features like: A server implementation hosted in IISExpress Client implementations running on IISExpress, a Console Application, and a Windows Store App Doing request/response operations sync and async Server pushing broadcast messages to ALL clients Server pushing group messages to specific devices like a web browser, a desktop, or a tablet."

AmplifyJS is a set of components designed to solve common web application problems with a simplistic API. Amplify's goal is to simplify all forms of data handling by providing a unified API for various data sources. Amplify's store component handles persistent client-side storage, using standards like localStorage and sessionStorage, but falling back on non-standard implementations for older browsers. Amplify's request adds some additional features to jQuery's ajax method while abstracting away the underlying data source.