By Trevor Burnham
English | 2012 | 104 pages | PDF | three MB
The techniques within the ebook are illustrated with runnable examples drawn from either the browser and the Node.js server framework, incorporating complementary libraries together with jQuery, Backbone.js, and Async.js. You’ll find out how to create dynamic web content and hugely concurrent servers via getting to know the paintings of allotting occasions to the place they should be dealt with, instead of nesting callbacks inside of callbacks inside of callbacks.
What you need
Table of Contents
Chapter 2. dispensing Events
Chapter three. supplies and Deferreds
Chapter four. circulation regulate with Async.js
Chapter five. Multithreading with Workers
Chapter 6. Async Script Loading
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So, for evented models to work, we have to remember to use methods like Backbone’s set and get. get('font'); // // // // // triggers alert! a a. com/111386188573471152118/posts/6peb6yffyWG To that end, Backbone models are often organized into Backbone collections, which are essentially evented arrays. You can listen for when models are added to and removed from them. Backbone collections automatically propagate events from the models they contain. For example, you might have a spriteCollection object containing hundreds of models representing things you’re drawing on a canvas element.
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Writing a selector for “elements with class tooltip that are not descendants of sidebar” is tricky and not very efficient. The problem would get exponentially harder if we decided to allow isolated containers to be nested to an arbitrary depth. But implementing this behavior with event logic rather than selector logic is easy. remove(); }); report erratum • discuss Chapter 2. Distributing Events • 28 (Notice the use of jQuery’s one instead of on. ) With these two lines of code, each tooltip will listen to its container and remove itself when the container gets a new tooltip.