Getting started with angular js
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Getting started with angular js

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Online presentation I did about getting started with AngularJS for DevelopMentor

Online presentation I did about getting started with AngularJS for DevelopMentor

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  • 1. Getting started with AngularJS Maurice de Beijer
  • 2. Who am I? Maurice de Beijer The Problem Solver Microsoft Integration MVP Freelance developer DevelopMentor instructor Twitter: @mauricedb http://msmvps.com/blogs/theproblemsolver/ • Blog: http://www.TheProblemSolver.nl • Web: mauricedb@develop.com • E-mail: • • • • • • 2
  • 3. What are we going to cover? • • • • • What is AngularJS? Getting started Directives Routing Services • Demos at: – http://bit.ly/dmangularjs • Source code at: – https://github.com/mauricedb/DM-Starting-AngularJS 3
  • 4. What is AngularJS? • AngularJS is an MVC framework for browser based apps – Open source and originally developed at Google • The clean architecture has attracted a large following quickly – Version 1.0 was released in June 2012 – Currently at 1.2.9 • The goal is building CRUD style business applications – Not as suitable for games etc • Use declarative programming for UI and imperative programming for the logic – The application is wired together in a declarative way • Supports modern desktop and mobile browsers – Internet Explorer version 8 and above 4
  • 5. Key features • Model View Controller architecture – A well known and proven architecture • Declarative two way data binding – Automatically synchronizes values between Model and View • Dynamic templates – Makes it very easy to update the user interface • Dependency injections – Code dependencies are automatically injected where needed • Extends HTML with directives – Lots of powerful standard directives or create your own • Build with testing in mind – Makes it much easier to unit test different parts 5
  • 6. Bootstrapping • Automatic bootstrapping – Add a reference to AngularJS – Add the ngApp attribute • Manual bootstrapping is also possible – Gives you more control – For example when using AMD/RequireJS 6
  • 7. The MVC of AngularJS 7
  • 8. Model • The business data • Exposed to the view through the $scope 8
  • 9. View • • • • The user interface layer Data binds to the model Calls functions on the controller Use declarative directives for reusable code 9
  • 10. Controller • Glues the view and the model together • Provides additional functionality • Uses additional services for reusable logic 10
  • 11. Services • Services are reusable pieces of business logic – Separation results in reuse and testability • Created as singleton objects – Inject by AngularJS using dependency injection • Services are created as part of a module – One module can take a dependency on another module • Modules are groupings of related functionality – Also used to bootstrap the application 11
  • 12. Standard Services • Many general purpose services provided by AngularJS – $http • Used for XMLHttpRequest handling – $location • Provide information about the current URL – $q • A promise/deferred module for asynchronous requests – $routeProvider • Configure routes in an SPA – $log • Logging service – Many more 12
  • 13. Dependency injection • AngularJS uses dependency injection to decouple modules – Dependencies are automatically injected by the framework • Based on the parameter name • JavaScript is often minified in production – Need to provide AngularJS with some extra hints 13
  • 14. Standard directives • Directives allow you to enhance HTML with new capabilities – Start using HTML as a domain specific language • AngularJS comes with a long list of standard directives – ngApp – ngBind – ngModel – ngRepeat – ngClick – ngEnable/ngDisable – ngHide/ngShow – ngView – … 14
  • 15. Custom directives • Turn HTML into your Domain Specific Language – Use templates to embed complete blocks • Can use either attributes, elements, CSS classes or comments • Directives let you interact with the DOM – The place for jQuery code 15
  • 16. Routing • Used to create SPA style application – The page can change without using the server • The ngView is often used to render a template – HTML templates loaded when needed – Can also be pre loaded as script with type="text/ng-template" • The $routeProvider service is used to configure the route • The $location service can be used to navigate – Using an anchor tag is also possible • The $routeParams service can be used to retrieve parameters – Properties named in the route URL template 16
  • 17. $http service • The basic service for doing all HTTP requests – The building block for all AJAX requests • Can be used as a function – $http(config) • Provides a number of shortcut methods – $http.post(url, config) – $http.get(url, config) – $http.put(url, config) – $http.delete(url, config) • Uses the promises API as the result – Provided by the $q service 17
  • 18. $resource • Creates a service for working with RESTful services – Much easier than using the $http object • Standard functions are already preconfigured – Only the common HTTP PUT is missing • Requires a dependency on ngResource – Located in angular-resource.js 18
  • 19. Questions ? The presentation and source code will be available http://msmvps.com/blogs/theproblemsolver/ 19