SPA: Key Questions

Apr 30, 20144 likes798 views

1. Single page applications (SPAs) load content dynamically via client-side JavaScript instead of reloading the entire page. This allows for a more fluid and complex user experience compared to traditional multi-page applications. 2. When developing an SPA, key questions include determining the basic modular units, managing module dependencies, selecting frameworks to handle tasks like routing and data handling, and defining an architecture for structuring the GUI and managing data and interactions between components. 3. A recommended architecture is to structure the SPA into independent and reusable web modules that communicate through well-defined interfaces and are managed by a central module manager. This allows for scalability and isolation of components.

Single Page Web
Application
KEY QUESTIONS
1

2
What are
the key questions
when developing an SPA?
What are
the key questions
when developing an SPA?

What’s an SPA?
1. A page is not completely reloaded
2. HTML is generated by client side JS
3. Client side state is stored with JS objects
3
Web
Page
SPA
Complexity
Low
High

.NET Web Evolution
3 GENERATION OF ASP.NET APPLICATIONS
4

.NET Web: Generation #1
ASP.NET Web Forms / 2002 – Now
5
Page
Web Form Code Behind
Life Cycle
ClientServer
No special
JS
structuring
GET / POST

.NET Web: Generation #2
ASP.NET MVC / 2009 – Now
6
Page
Controller
ClientServer
Primitive
JS
structuring
GET / POST

.NET Web: Generation #3
ASP.NET Web API / 2012 – Now
7
Page
REST API
ClientServer
Strong
JS
structuring
Mobile App
GET / POST / PUT / DELETE

1. Base JS “Bricks”
1.1. WHAT IS A MINIMAL STRUCTURAL UNIT?
1.2. HOW TO MANAGE DEPENDENCIES AMONG UNITS?
9

JS Module Pattern
10
Provides both private and public
encapsulation for classes
The Module Pattern (by Addy Osmani)

JS Module Example
11
▪ Closure is used for
private state
▪ “Public” object is
returned
▪ Created by IIFE

JS Module Standards: AMD
16
define(id?, dependencies?, factory)
AMD Specification (on Git Hub)
Writing Modular JavaScript With AMD, CommonJS & ES Harmony (by Addy Osmani)

JS Module Quality Criterion
17
How easily could a JS Module be covered
by UNIT TESTS?

2. Frameworks
2.1. WHAT IS A STACK OF BASE FRAMEWORKS?
18

Criteria to Frameworks Stack
1. Extending of base JS functions
2. DOM processing
3. HTML templates
4. AJAX / REST handling
5. MV*
6. Routing
7. JS Modules management
19

Top JS MV* Frameworks
20
Knockout.js
Ember.js
Angular.js
Backbone.js

Sample of Frameworks Stack
21
Backbone.js
Underscore.js
jQuery Require.js

3. Architecture
3.1. HOW TO STRUCTURE GUI?
3.2. HOW TO KEEP DATA?
3.3. HOW TO PUT THINGS TOGETHER?
22

Web Module
1. Works independently from other web modules
2. Works within the “sandbox”
3. Has limited knowledge regarding the whole application
4. Is managed by a web module manager
23
Scalable JavaScript Application Architecture (by Nicholas Zakas)
Web Module = HTML + CSS + JS

Web Modules: Base Idea
24
Web Module 1 Web Module 2
Web Modules Manager
 Manages a web module
life cycle
 Manages collaboration
among modules
Web Module Context
 Everything a web
module knows about
the application
 Manage user’s
interaction
 Don’t know about
each other
Web Module
↓
an independent
part of GUI

Web Modules:
Hierarchical Implementation
25
Root Web Module
Web Module 1
Web Module 1-1 Web Module 1-2
Application
Web Module 2
Web Module 2-1 Web Module 2-2

Parent & Child Web Modules
26
Parent
Child
Communication between parent and child
Child'slife cycle management
1: Register(context, eventHandlers)
3: Invoke a child'smethod()
2: Unregister()
4: Raise an event()

Web Module: Quality Criterion
27
How much is a web module depended from
the other web modules?

Data Aggregate
28
Customer Order
Item
REST API
Web Module 1 Web Module 2

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SPA: Key Questions

1. Single Page Web Application KEY QUESTIONS 1

2. 2 What are the key questions when developing an SPA? What are the key questions when developing an SPA?

3. What’s an SPA? 1. A page is not completely reloaded 2. HTML is generated by client side JS 3. Client side state is stored with JS objects 3 Web Page SPA Complexity Low High

4. .NET Web Evolution 3 GENERATION OF ASP.NET APPLICATIONS 4

5. .NET Web: Generation #1 ASP.NET Web Forms / 2002 – Now 5 Page Web Form Code Behind Life Cycle ClientServer No special JS structuring GET / POST

6. .NET Web: Generation #2 ASP.NET MVC / 2009 – Now 6 Page Controller ClientServer Primitive JS structuring GET / POST

7. .NET Web: Generation #3 ASP.NET Web API / 2012 – Now 7 Page REST API ClientServer Strong JS structuring Mobile App GET / POST / PUT / DELETE

8. The Key Questions 8

9. 1. Base JS “Bricks” 1.1. WHAT IS A MINIMAL STRUCTURAL UNIT? 1.2. HOW TO MANAGE DEPENDENCIES AMONG UNITS? 9

10. JS Module Pattern 10 Provides both private and public encapsulation for classes The Module Pattern (by Addy Osmani)

11. JS Module Example 11 ▪ Closure is used for private state ▪ “Public” object is returned ▪ Created by IIFE

12. JS Module Dependencies 12

13. JS Module Extending 13

14. Pseudo Class as a JS Module 14

15. Backbone collection as a JS Module 15

16. JS Module Standards: AMD 16 define(id?, dependencies?, factory) AMD Specification (on Git Hub) Writing Modular JavaScript With AMD, CommonJS & ES Harmony (by Addy Osmani)

17. JS Module Quality Criterion 17 How easily could a JS Module be covered by UNIT TESTS?

18. 2. Frameworks 2.1. WHAT IS A STACK OF BASE FRAMEWORKS? 18

19. Criteria to Frameworks Stack 1. Extending of base JS functions 2. DOM processing 3. HTML templates 4. AJAX / REST handling 5. MV* 6. Routing 7. JS Modules management 19

20. Top JS MV* Frameworks 20 Knockout.js Ember.js Angular.js Backbone.js

21. Sample of Frameworks Stack 21 Backbone.js Underscore.js jQuery Require.js

22. 3. Architecture 3.1. HOW TO STRUCTURE GUI? 3.2. HOW TO KEEP DATA? 3.3. HOW TO PUT THINGS TOGETHER? 22

23. Web Module 1. Works independently from other web modules 2. Works within the “sandbox” 3. Has limited knowledge regarding the whole application 4. Is managed by a web module manager 23 Scalable JavaScript Application Architecture (by Nicholas Zakas) Web Module = HTML + CSS + JS

24. Web Modules: Base Idea 24 Web Module 1 Web Module 2 Web Modules Manager  Manages a web module life cycle  Manages collaboration among modules Web Module Context  Everything a web module knows about the application  Manage user’s interaction  Don’t know about each other Web Module ↓ an independent part of GUI

25. Web Modules: Hierarchical Implementation 25 Root Web Module Web Module 1 Web Module 1-1 Web Module 1-2 Application Web Module 2 Web Module 2-1 Web Module 2-2

26. Parent & Child Web Modules 26 Parent Child Communication between parent and child Child'slife cycle management 1: Register(context, eventHandlers) 3: Invoke a child'smethod() 2: Unregister() 4: Raise an event()

27. Web Module: Quality Criterion 27 How much is a web module depended from the other web modules?

28. Data Aggregate 28 Customer Order Item REST API Web Module 1 Web Module 2

29. 29

30. Thank You! 30

SPA: Key Questions

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