ANGULARJS TUTORIAL PDF
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AngularJS Tutorial in PDF
Narasimha Murthy. This tutorial is specially design to help beginners to learn AngularJS from very basic example to advance quickly and efficiently. Develop and maintained by Google and by a community of individual developers.
In following example, we've iterated over array of cities.
Angular expression are putting inside the double braces. Expressions behaves in same way as ng-bind directives.
You can use express in the place of ng-bind. AngularJS application expressions are like JS expressions and put the data where they are used. In other word controller is used to control the data in the whole application.
AngularJS Controller This example explain the concept of the angular controller with point to point explanation. 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. Angular building blocks: Templates 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.
Angular building blocks: Services 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.
AngularJS introduction and PDF Tutorials
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. Here we have all the files that make our Angular app. Please note that we will not enter in details about testing in this post.
When we run ng serve it will use by default the dev env.
If you like to run in production mode you need to add the --prod flag to the ng serve. The only thing that comes to my mind now, that you may include in this file, are some meta tags but you can also handle these through Angular as well. Angular best practices: The app folder This is the core of the project. It imports the CommonModule because its component needs common directives. You will notice that it re-exports other modules.
If you review the application, you may notice that many components requiring SharedModule directives also use NgIf and NgFor from CommonModule and bind to component properties with [ ngModel ], a directive in the FormsModule. SharedModule can still export FormsModule without listing it among its imports. Briefly, it is a superset of css that will ease and speed your development cycles incredibly. Each service has only the functions related to it.
Within those folders you will find every related file for the pages included in that component. This includes the html for the layout, sass for the styles and the main page component. It can also be wrapped with content that you want to be in every page for example a toolbar. If you use lazy modules, child routes of other lazy modules are defined inside those modules. As we advance in this tutorial we will be creating more pages and perform basic navigation.
Angular app navigation and routing After seeing the components diagram and the project structure, this is the navigation we propose for the app.
We start in the categories page and from there we can only navigate to the questions of one of the categories. Then follow the arrows from the image below to see the other navigations available in this angular 7 example app.
Another important thing to consider is that we used Breadcrumbs to navigate back to the previous pages. Before we start thinking about navigation, we must consider the type and amount of data you want to display in your app.
Don't forget you will use navigation to show and structure your data, that is why it should follow the information structure of your app and not the other way around. It is important to keep the best practices for navigation design. This ensures that people will be able to use and find the most valuable features in your app. Good navigation, like good design, is invisible.
With this module you can create routes, which allows you to move from one part of the application to another part or from one view to another. For routes to work, you need an anchor or element in the UI to map actions typically clicks on elements to routes URL paths. We use the routerLink directive for this purpose. In the same folder as the root module, create a config file called app.
The empty string for the CategoriesComponent's path means that the CategoriesComponent will be rendered when there is no URL also known as the root path. Note that for each route we also have a resolve.
Using resolves is a very good practice to make sure that all necessary data is ready for our components to use and avoid displaying a blank component while waiting for the data. For example in we use a CategoriesResolver to fetch the list of categories. Once the categories are ready, we activate the route. Please note that if the resolve Observable does not complete, the navigation will not continue. Finally, the root module must also know the routes we defined above.
Add a reference to the routes in the imports property of the AppModule. These include modals, popups, cards, lists, menus, etc. Two of the most used UI component libraries are Angular Material and ngx-bootstrap. Angular Material is the official Angular UI library and provides tons of components.
On the other hand, ngx-bootstrap provides a series of Angular components made on top of Twitter Bootstrap framework. In this Angular tutorial we are going to use Angular Material, but feel free to choose the one that best fits your needs as they are both super complete and robust. In this angular 7 example app, we have different layouts.
For each view we need different UI components. Categories view A list showing the different Angular concepts you need to learn. Material Components: List component for the categories list Chips component for the category tags Category Questions view A view to show all the questions of a particular category. Material Components: List component for the questions list Button component Dialog component for the modals Question Answers view A view to show all the answers of a particular question.
Please feel free to dig the library of UI components that Angular Material has in their components documentation page. Adding a backend to our Angular example project Different alternatives for backend API data integrations The key to an evolving app is to create reusable services to manage all the data calls to your backend.
As you may know, there are many ways when it comes to data handling and backend implementations.
In this tutorial we will explain how to consume data from a static json file with dummy data. This works the same and is independent on the way you implement the backend.
We will talk about models and services and how they work together to achieve this. We encourage the usage of models in combination with services for handling data all the way from the backend to the presentation flow. Domain Models Domain models are important for defining and enforcing business logic in applications and are especially relevant as apps become larger and more people work on them.
At the same time, it is important that we keep our applications DRY and maintainable by moving logic out of components themselves and into separate classes models that can be called upon. A modular approach such as this, makes our app's business logic reusable.
To learn more about this, please visit this great post about angular 2 domain models.If we had to reuse some of those UI blocks elsewhere in our app, the other one would be glued along.
It imports the CommonModule because its component needs common directives. If you have any questions or concerns, feel free to email us at us at fullstack. I'm enjoying reading it and I'm learning so much about AngularJS. Thank you very much for your effort.