組件模型現況（Fwd: Component Model Update）

對 HTML 部件（Widget）有興趣的朋友可以看看，這也是所謂的前 XBL 的部份，
想幫忙的朋友也可以把那幾個 wiki 頁面翻譯一下。相深入討論的歡迎拿一些不滿
的地方評論、批評、問問題！
相關歷史回顧：《我来冒死发点激进言论，欢迎大家逐条批判――我理想中的HTML和
CSS》[1]

[1]
http://lists.w3.org/Archives/Public/public-html-ig-zh/2010Sep/thread#msg42


Kenny

-------- Original Message --------
Subject:  Component Model Update
Resent-Date:  Tue, 23 Aug 2011 20:41:25 +0000
Resent-From:  public-webapps@w3.org
Date:  Tue, 23 Aug 2011 13:40:47 -0700
From:  Dimitri Glazkov <dglazkov@chromium.org>
To:  public-webapps <public-webapps@w3.org>
CC:  Maciej Stachowiak <mjs@apple.com>, Jonas Sicking
<jonas@sicking.cc>, Boris Zbarsky <bzbarsky@mit.edu>



All,

Over the last few weeks, a few folks and myself have been working on
fleshing out the vision for the Component Model. Here's what we've
done so far:

* Created a general overview document for behavior attachment problem
on the Web (http://wiki.whatwg.org/wiki/Behavior_Attachment);
* Wrote down the a set of guidelines on how we intend to tackle the
problem (http://wiki.whatwg.org/wiki/Component_Model_Methodology);
* Updated the list of use cases and desired properties for each case
(http://wiki.whatwg.org/wiki/Component_Model_Use_Cases);
* Captured the overall component model design and how it satisfies
each desired property (http://wiki.whatwg.org/wiki/Component_Model),
including a handy comparison with existing relevant specs and
implementations
(http://wiki.whatwg.org/wiki/Component_Model#Comparison_With_Existing_Specs_and_Implementations).

After of this iteration, the proposed shadow DOM API no longer
includes the .shadow accessor (see details here
http://dglazkov.github.com/component-model/dom.html). Instead, the
shadow DOM subtree association happens in ShadowRoot constructor:

var element = document.createElement("div");
var shadow = new ShadowRoot(element); // {element} now has shadow DOM
subtree, and {shadow} is its root.
shadow.appendChild(document.createElement("p")).textContent = "weee!!';

Keeping the accessor out allows for proper encapsulation and
confinement (better explanation of these new bits of terminology here:
https://plus.google.com/103035368214666982008/posts/AnGBpHZzQu6), and
also simplifies the API surface.

Please review. Feedback is welcome!

:DG<