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Detailed steps for these are available in the earlier article that I had written www.
This pipeline definition will have only four tasks: 1. It will require the path of folder that contains package. Archive Files: This task will create a.
Create a new Web App as a placeholder for the app that you are going to deploy. An earlier article in this series on Building and Deploying ReactJs apps gave detailed steps to do do. Give the name Dev to the first stage. Add the artifact that is created by the build pipeline that you have created earlier. Select Latest as the default version to be deployed. In the tasks section, Select and Authorize your Azure subscription.
After you create a new release in this pipeline, you will get the deployed application. It now shows a custom UI instead of the placeholder that was added when the app was created. If you want to test the app, check the steps in an earlier article in the series. Conclusion In this article, we stepped you through the creation of a React. Thanks to Tim Sommer for his suggestions and for technically reviewing this article. This article has been editorially reviewed by Suprotim Agarwal.
C and. Log in to your account. Not yet a member? Register for an account and access leading-edge content on emerging technologies. Register now. Packt Logo. My Collection. Deal of the Day Understand the fundamentals of C programming and get started with coding from ground up in an engaging and practical manner.
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Are you sure you want to claim this product using a token? Vadim Mirgorod August Quick links: What do I get with a Packt subscription? What do I get with an eBook? What do I get with a Video? Frequently bought together. Learn more Add to cart. Paperback pages. Book Description There is no doubt that the superior rendering power of HTML5, thin-to-thick client transition and REST style communication created a new era in web development, replacing the outdated approach based on browser plugin technologies.
Table of Contents Chapter 1: Understanding Backbone. Modeling an application's behavior with views and a router. Chapter 2: Chapter 3: Storing models of various types in the same collection. Chapter 4: The Controller receives data back from the Model, loads an appropriate View, injects the Model data into it, and returns the response to the browser. This would return the blog article data from the database for editing.
Finally, the resulting HTML response would be returned to the browser. As you can imagine, a similar flow is necessary with POST requests after we press a save button in a form. Within Index Action there would be a call to the Articles model and its Articles::getLastEntries 10 method which would return the last 10 blog posts. At that entry point, the Front Controller analyzes the request and, based on it, invokes an Action of the appropriate Controller. This process is called routing.
The Model communicates with the data source e. Once the Model completes its work it returns data to the Controller which then loads the appropriate View. The View executes presentation logic loops through articles and prints titles, content, etc.
In the end, an HTTP response is returned to the browser.
This is at odds with the traditional approach to web app development which is very server-centric, requiring a complete page reload to move from one page to the next. In addition to resulting in a great deal of duplicated content being served back to the user, this approach affects both latency and the general responsiveness of the user experience. A trend to improve perceived latency in the past few years has been to move towards building Single Page Applications SPAs - apps which after an initial page load are able to handle subsequent navigations and requests for data without the need for a complete reload.
This improves usability and responsiveness. SPAs can also take advantage of browser features like the History API to update the address seen in the location bar when moving from one view to another. These URLs also make it possible to bookmark and share a particular application state, without the need to navigate to completely new pages. The typical SPA consists of smaller pieces of interface representing logical entities, all of which have their own UI, business logic and data.
A good example is a basket in a shopping web application which can have items added to it. This basket might be presented to the user in a box in the top right corner of the page see the picture below : The basket and its data are presented in HTML. There was a time when we used jQuery or a similar DOM manipulation library and a bunch of Ajax calls and callbacks to keep the two in sync.
That often produced code that was not well-structured or easy to maintain. Bugs were frequent and perhaps even unavoidable. The need for fast, complex, and responsive Ajax-powered web applications demands replication of a lot of this logic on the client side, dramatically increasing the size and complexity of the code residing there. Eventually this has brought us to the point where we need MVC or a similar architecture implemented on the client side to better structure the code and make it easier to maintain and further extend during the application life-cycle.
It will also need an HTML template containing a placeholder for a Todo item title and a completion checkbox which can be instantiated for Todo item instances. Model and simply defines default values for two data attributes.
As you will discover in the upcoming chapters, Backbone Models provide many more features but this simple Model illustrates that first and foremost a Model is a data container.
View and is instantiated with an associated Model. In our example, the render method uses a template to construct the HTML for the Todo item which is placed inside an li element. Each call to render will replace the content of the li element using the current Model data. Thus, a View instance renders the content of a DOM element using the attributes of an associated Model. Later we will see how a View can bind its render method to Model change events, causing the View to re-render whenever the Model changes.
So far, we have seen that Backbone. View implements the View. However, as we noted earlier, Backbone departs from traditional MVC when it comes to Controllers - there is no Backbone. Instead, the Controller responsibility is addressed within the View. Recall that Controllers respond to requests and perform appropriate actions which may result in changes to the Model and updates to the View.
In a single-page application, rather than having requests in the traditional sense, we have events. Events can be traditional browser DOM events e.
While in this instance events help us relate Backbone to the MVC pattern, we will see them playing a much larger role in our SPA applications. Event is a fundamental Backbone component which is mixed into both Backbone.
Model and Backbone. View, providing them with rich event management capabilities. Note that the traditional controller role Smalltalk style is performed by the template, not by the Backbone.
This completes our first encounter with Backbone. The remainder of this book will explore the many features which build on these simple constructs. Once loaded, a client-side Router intercepts URLs and invokes client-side logic in place of sending a new request to the server. The handlers update the DOM and Models, which may trigger additional events. Models are synced with Data Sources which may involve communicating with back-end servers.
Models The built-in capabilities of Models vary across frameworks. When using Models in real-world applications we generally also need a way of persisting Models. A Model may have multiple Views observing it for changes. By observing we mean that a View has registered an interest in being informed whenever an update is made to the Model. This allows the View to ensure that what is displayed on screen is kept in sync with the data contained in the model.
Depending on your requirements, you might create a single View displaying all Model attributes, or create separate Views displaying different attributes. In Backbone, these groups are called Collections. Managing Models in groups allows us to write application logic based on notifications from the group when a Model within the group changes.
This avoids the need to manually observe individual Model instances. Collections are also useful for performing any aggregate computations across more than one model.
Views Users interact with Views, which usually means reading and editing Model data. For example, in our Todo application, Todo Model viewing happens in the user interface in the list of all Todo items.