Angularjs by Example. Average rating: 0 out of 5 stars, based on 0 reviews Write a review. Tell us if something is incorrect. Add to Cart. Free delivery. Arrives by Thursday, Oct 3. Or get it by Wed, Sep 25 with faster delivery. Pickup not available. About This Item We aim to show you accurate product information. Manufacturers, suppliers and others provide what you see here, and we have not verified it. See our disclaimer. Specifications Publisher Packt Publishing. Customer Reviews. They provide an easy way to create angular pages and services for your app. This makes going from a basic app to a full featured navigation web app much easier.
I call that an easy learning curve :.
The angular-CLI will add a reference to components, directives and pipes automatically in the app. Note: Please refer to angular CLI documentation for more information about adding components and other elements to your app. The example app aims to help you learn the fundamental concepts of Angular Framework. The plan for this tutorial is to build an app that takes you step-by-step from setup to a full-featured example that serves to demonstrate the essential characteristics of a professional application: a sensible project structure, data binding, services, resolvers, pipes, angular material, dependency injection, navigation and remote data access.
We will learn enough core Angular to get started and gain the confidence that Angular can do whatever we need it to do. We will be covering a lot of ground at an introductory level but we will also link to plenty of references to topics with greater depth. In the next tutorial we will explore how to add a backend for this Angular app, using the MEAN stack. Angular is a framework designed to build single page applications SPAs and most of its architecture design is focused towards doing that in an effective manner. Single-page application or SPA are applications that are accessed via web browser like other websites but offer more dynamic interactions resembling native mobile and desktop apps.
The most notable difference between a regular website and SPA is the reduced amount of page refreshes.
AngularJS by Example
Typically, 95 percent of SPA code runs in the browser; the rest works in the server when the user needs new data or must perform secured operations such as authentication. Modules help organize an application into cohesive functionality blocks by wrapping components, pipes, directives, and services. They are just all about developer ergonomics. Angular applications are modular. Every Angular application has at least one module— the root module, conventionally named AppModule.
The root module can be the only module in a small application, but most apps have many more modules. As the developer, it's up to you to decide how to use the modules. Typically, you map major functionality or a feature to a module. Let's say you have four major areas in your system.
Why Should You Use AngularJS?: Key Features And Reasons - By Sanjay Ratnottar
They are basically used for attaching metadata to classes so that it knows the configuration of those classes and how they should work. The NgModule decorator properties that describe the module are:. Components are the most basic building block of an UI and Angular applications. A component controls one or more sections on the screen what we call views. A component is self contained and represents a reusable piece of UI that is usually constituted by three important things:.
Using the Angular Component decorator we provide additional metadata that determines how the component should be processed, instantiated and used at runtime. For example we set the html template related to the view, then, we set the html selector that we are going to use for that component, we set stylesheets for that component. The Component passes data to the view using a process called Data Binding. Binding can be used to display property values to the user, change element styles, respond to an user event, etc.
A component must belong to an NgModule in order for it to be usable by another component or application. To specify that a component is a member of an NgModule , you should list it in the declarations property of that NgModule. Imagine we have two different UI blocks in the same component and in the same file.
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At the beginning, they may be small but each could grow. We are sure to receive new requirements for one and not the other. Yet every change puts both components at risk and doubles the testing burden without any benefits. If we had to reuse some of those UI blocks elsewhere in our app, the other one would be glued along. That scenario violates the Single Responsibility Principle.
computavel.xtage.com.br/21069.php You may think this is only a tutorial, but we need to do things right — especially if doing them right is easy and we learn how to build Angular apps in the process. A typical Angular application looks like a tree of components. The following diagram illustrates this concept.
Note that the modal components are on the side of the parent component because they are imperative components which are not declared on the component html template. Templates are used to define a component view. A template looks like regular HTML, but it also has some differences. These components mix seamlessly with native HTML in the same layouts. Almost anything can be a service, any value, function, or feature that your application needs. A service is typically a class with a narrow, well-defined purpose.
It should do something specific and do it well. The main purpose of Angular Services is sharing resources across components. Take Component classes, they should be lean, component's job is to enable the user experience mediate between the view and the application logic and nothing more. They don't fetch data from the server, validate user input, or log directly to the console. They delegate such tasks and everything nontrivial to services. Services are fundamental to any Angular application, and components are big consumers of services as they help them being lean.
Angular doesn't enforce these principles, but it helps you follow these principles by making it easy to structure your application logic into services and make those services available to components through dependency injection. Each of them has only the functions related to them. In this specific tutorial we will only focus on CategoriesService and in the following parts we will discuss the others. You can find these and much more information in our upcoming post about "Angular: The learning path". If you want to build a complex and robust web app with Angular you should check Angular Admin Template which is the most complete and advanced Angular Admin Template with lots of components and performance improvements.
The cli setup procedures install lots of different files. Most of them can be safely ignored. This is where most of the work for your Angular app will take place. Note: Here's a great video introducing Angular directives. Directives are not just custom elements, they are much more Gotta keep it DRY. We then make an alias for the controller under the name of inbox. This alias is then accessible inside the controller as this and inside the template as inbox.
If you look inside the template you'll see expressions like inbox. These are the same this. Finally we have a link function that will run straight after the controller runs. The link function will then receive the aliased controller as the fourth argument, here we named it ctrl. Yes that's right, the link function has fixed positions for it's arguments i. Note: This is different behavior to the controller's arguments which are injected and therefore can take any order.
Notice the use of built-in angular directives such as ng-hide , ng-show , ng-click , ng-repeat and ng-model. We won't go into much detail about these directives as each can be quite a big topic but you can read about them here. Angular ships with some really useful Directives, such as ng-show , ng-repeat and ng-click. There are many built-in Directives, and more get added each release to help enhance how we build our apps.