AngularJS by Brad Green, Shyam Seshadri

By Brad Green, Shyam Seshadri

Develop smaller, lighter net apps which are uncomplicated to create and straightforward to check, expand, and continue as they develop. This hands-on advisor introduces you to AngularJS, the open resource JavaScript framework that makes use of Model–view–controller (MVC) structure, info binding, client-side templates, and dependency injection to create a much-needed constitution for development internet apps.

Guided by way of engineers who labored on AngularJS at Google, you’ll stroll throughout the framework’s key beneficial properties, after which construct a operating AngularJS app—from structure to checking out, compiling, and debugging. You’ll find out how AngularJS is helping decrease the complexity of your net app.
* Dive deep into Angular’s development blocks and learn the way they interact
* achieve greatest flexibility by means of keeping apart good judgment, info, and presentation duties with MVC
* gather your complete app within the browser, utilizing client-side templates
* Use AngularJS directives to increase HTML with declarative syntax
* speak with the server and enforce uncomplicated caching with the $http provider
* Use dependency injection to enhance refactoring, testability, and a number of surroundings layout
* Get code samples for universal difficulties you face in such a lot internet apps

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Just as one example, let’s consider handling keypresses in IE vs. Firefox. Let’s say we want to hook the keyDown event for the current document. KEYDOWN); The basic keyDown() function signature for either browser is this: function keyDown(e) { } In Firefox, the parameter e will be an event object passed in that describes the keypress event. In IE, however, this parameter is not passed in at all because IE uses an event model called event bubbling. To get a reference to the event object in IE, you need to reference the event property of the window object.

Or that Frank isn’t the name of my father (which it just happens to be)? Clearly, the call syntax for Person2 is better in terms of code clarity. The code is also a bit more easily extensible with that approach. This is a relatively minor point, but it is an element of style that has only in the past few years come into the minds of JavaScript developers. Early on, you would rarely have seen the approach used in Person2. You would have instead seen function calls with oodles of arguments. But if you asked C++ developers how they would have coded this, you almost certainly would hear an answer involving some sort of collection, maybe a value object being passed in, or something along those lines.

To get a reference to the event object in IE, you need to reference the event property of the window object. This isn’t a difference in JavaScript itself; this is a difference in the event-handling model in the DOM of each browser. To take the example further, once you have a reference to the event object, you will quite likely want to figure out which key was actually pressed. Again, there are DOM differences to overcome. In IE, the event object exposes a keyCode property. In Firefox, the corresponding property is called charCode.

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