About
Dieter Pisarewski
Software Developer
Contact Information:
dp@megorei.com
http://www.megorei.com
megorei Software GmbH
Hohe Brücke 1
20459 Hamburg
Newsfilter
Single-page Web-App built on top of
Ember.js and Rails
Overview
- Newsfilter app
- Ember features
- Pros & Cons
- Summary
Newsfilter app
Use cases:
-
Add RSS/Atom feeds
- Edit and delete feeds
-
Tag feeds
-
View articles from feeds
- Filter articles by tags and feeds
- Show best articles and articles from own feeds
-
Like articles
Ember features
- Classes
- Computed properties & Observers
- Non-standard MVC
- Auto-updating templates
- Run-Loop
Ember features
Classes
-
extend() for inheritance
-
create() for new instance
-
init for initializer
-
get() and set() methods for properties
Ember features
Computed properties
Automatic update when dependency changes
Ember features
Auto-updating templates
-
Bind properties on elements
-
Class bindings
Ember features
Templates: Action handling
Pros & Cons
Pros
- Better user experience(compared to classic Web-Apps)
- Bindings & Observers care for automatic updates
- Generated Controllers, Routes, Views are sufficient for simple use cases
- Pretty much functionality for client-side/offline applications
- Well-documented API
-
Client-side rendering(lower server workload)
Pros & Cons
Cons
- Asynchronous programming
- If error responses from server are not handled user doesn't know about data loss.
- Preparing of loaded data for templates can be tricky because of asynchronous behavior and declarative template language.
- Action handling is spread among Views, Controllers and Routes
- Duplicated logic an client and server(e.g. validations)
- Too few code examples / too little community
- Side effects like in all stateful apps
- Client-side rendering(higher client workload)
Pros & Cons
Thin vs Fat Clients
Summary
Ember.js is good for:
- Offline apps
- Apps where user experience has the highest priority
-
Mobile HTML5 Apps?
Not good for:
-
Apps with complex data model(many associations between entities associations) or complex workflows
-
Apps where user experience is not as important as other aspects
About Dieter Pisarewski Software Developer Contact Information: dp@megorei.com http://www.megorei.com megorei Software GmbH Hohe Brücke 1 20459 Hamburg
