Introduction to Backbone.js
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An introduction into Backbone.js – a lightweight MVC framework. Backbone supplies structure to JavaScript-heavy applications by providing models with key-value binding and custom events, collections with a rich API of enumerable functions, views with declarative event handling, and connects it all to your existing application over a RESTful JSON interface.
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Introduction to Backbone.js
- 1. Backbone.js MVC in the Browser Jonathan Weiss
- 2. Who am I? Jonathan Weiss § Peritor GmbH in Berlin § Webistrano / Capistrano § Ruby: SimplyStored, Happening § FreeBSD: Original Rubygems & Rails maintainer § The great fire of London http://www.peritor.com http://github.com/jweiss @jweiss 2
- 3. Scalarium Amazon EC2 Cluster Management § Auto-Config § Self-Healing § Auto-Scaling § One-click-deployment www.scalarium.com 3
- 4. Web App History 4
- 5. Web 1.0 GET Webserver PAGE 5
- 6. Web 1.0 GET PAGE Webserver GET PAGE 6
- 7. Ajax GET Webserver PAGE 7
- 8. Ajax GET PAGE Webserver GET PAGE Fragment 8
- 9. Ajax GET PAGE Logic GET Load PAGE Fragment Fragment 9
- 10. Ajax GET PAGE Models, Validation, Rendering, Mess for GET .... PAGE complex apps Fragment 10
- 11. Ajax Can get messy really fast § Loading multiple HTML fragments when updating single entity § Handle validation errors from the server § Dependency between fragments, multiple views need to change on update § TESTING! 11
- 12. 12
- 13. 13
- 14. 14
- 15. 15
- 16. Principles DRY
- 17. 17
- 18. Backbone.js supplies structure to JavaScript-heavy applications by providing § Models § Collections § Views & Templating § Router 18
- 19. Backbone.js http://documentcloud.github.com/backbone/ § BSD license § Depends on § jQuery § underscore.js § template engine (build-in, mustache, handlebars, eco, …) § Lightweight – no UI widgets or desktop GUI in the browser § Backend agnostic by talking to RESTful JSON endpoints 19
- 20. MVC
- 21. MVC Router
- 22. Model Business model Domain logic Reusable
- 23. Models in Backbone Data store Setters & setters Events & notifications Persistence in & out JSON (optional)
- 24. Collection List of models Events & notifications Adjust with URL / JSON List comprehensions: map, inject, select, …
- 25. View Presentation Specific to a use-case Different views for different perspectives on a model
- 26. Views in Backbone Display UI & data Templating Respond to user input Respond to model change
- 27. Controller Conducts and connects Inspects user requests and responds Delegate instead of work
- 28. Router in Backbone Map URLs to JS actions History state management Instantiation of initial setup
- 29. Workflow with Backbone.js fetch Model Server JSON 29
- 30. Workflow with Backbone.js View 1 View 2 notify fetch Model Server JSON 30
- 31. Workflow with Backbone.js render View 1 View 2 notify fetch Model Server JSON 31
- 32. Workflow with Backbone.js render View 1 View 2 update inject notify fetch Model Server JSON 32
- 33. Workflow with Backbone.js View 1 View 2 update, click, input,... Model
- 34. Workflow with Backbone.js View 1 View 2 update, click, input,... update Model
- 35. Workflow with Backbone.js View 1 View 2 update, click, input,... update notify Model
- 36. Workflow with Backbone.js View 1 View 2 update, click, input,... update notify update Model Server JSON 36
- 37. Workflow with Backbone.js render View 1 View 2 update inject notify Model 37
- 38. Show Me The Code 38
- 39. Model 39
- 40. Collection Assumes RESTful JSON backed, e.g. /servers/4646 … 40
- 41. View 41
- 42. View 42
- 43. View 43
- 44. Custom Events 44
- 45. Custom Events 45
- 46. 46
- 47. Data, Events & Views Pattern § User or server trigger data change, never update view directly § Data update triggers change event § Views subscribe to change events and re-render § Router to connect URLs to actions and initialize views 47
- 48. Give Me More 48
- 49. Validations Failed validation will prevent set and save Triggers error event 49
- 50. List Comprehensions 50
- 51. List Comprehensions Short form for map on an attribute 51
- 52. Navigation & Back Button 52
- 53. 53
- 54. 54
- 55. 55
- 56. http://documentcloud.github.com/backbone/ http://peepcode.com/products/backbone-js http://peepcode.com/products/backbone-ii 56
- 57. Q&A Peritor GmbH Blücherstr. 22, Hof III Aufgang 6 10961 Berlin Tel.: +49 (0)30 69 20 09 84 0 Fax: +49 (0)30 69 20 09 84 9 Internet: www.peritor.com E-Mail: info@peritor.com © Peritor GmbH - Alle Rechte vorbehalten