scribegriff / having-fun-with-dart

Using Dart, JSON, AJAX and CORS to Create a Tabbed Panel Feed Reader

A Tabbed Panel Feed Reader in Dart

Dart Editor version 0.6.21_r26639
Dart SDK version 0.6.21.3_r26639
8/29/2013 1:29:11 PM
See the blog entry at scribeGriff.com/studios for a detailed explanation of the code.
Comments: Update to use 'dart:convert'
Tags: Dart, JSON, AJAX, CORS, XHR, XHR2

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Usage:

void main() {
  new TabbedFeedReader().loadFeed();
}

Revision History

1.) 29 Aug 2013: The 'dart:json' library is being removed. Using 'dart:convert' instead. The equivalent of stringify is dart:convert's JSON.encode, and the equivalent of parse is JSON.decode.

2.) 23 Jan 2013: Includes M2 fixes such as addHtml becoming appendHtml. Biggest change is import of dart:json library:

import 'dart:json';

is now (lower case is recommended for prefixes):

import 'dart:json' as json;

This is because both parse and stringify are now top level functions. By importing the library as json, we can keep the syntax as:

json.parse(response);

Some of the code is also now using static methods that return futures for the HttpRequest (expect more updates related to this). So:

new XMLHttpRequest.get(_feedURL, (jsonRequest)...

is now:

HttpRequest.request(_feedURL).then((jsonRequest)...

3.) 22 Sept 2012: XMLHttpRequest is now HttpRequest in Dart.
Replaced instances of

new XMLHttpRequest.get(_feedURL, (jsonRequest)...

with:

new HttpRequest.get(_feedURL, (jsonRequest)...

Dart now has much nicer syntax for dealing with HTML (addHTML) and Text (addText).
Replaced instances of:

element.insertAdjacentHTML('beforeend', 'htmlString');

with:

element.addHTML('htmlString);

General pre-M1 changes including removal of #resource and var keyword from try-catch statements.

4.) 16 June 2012: Removed use of '+' string concatenation operator.
Replaced instances of:

element.innerHTML += 'htmlString';

with:

element.insertAdjacentHTML('beforeend', 'htmlString');

5.) 19 May 2012: Updated to Dart Editor build 7552.

_feedCont = window.document.query('#feedContainer'); 

became

_feedCont = document.query('#feedContainer');

and

xhr = new XMLHttpRequest.getTEMPNAME(feedURL, (jsonRequest)

is now

xhr = new XMLHttpRequest.get(feedURL, (jsonRequest)

6.) 21 February 2012: Initial release with Dart Editor build 4577.

Classes:

class TabbedFeedReader

Methods/functions

constructor - TabbedFeedReader()
void _changeDisplay(List _displayList)
void loadFeed()
void _iterateEntries()
void _processResponse(var jsonResponse)
void _githubFeed()
void _processGits(var jsonResponse)