February 2014
Intermediate to advanced
372 pages
7h
Japanese
Content preview from Backbone.jsアプリケーション開発ガイド
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2.2
MVC
のメリット
21
2.1.5.6
コントローラ
Todo
アプリケーションでは、コントローラはユーザーが編集用ビューで行った操作への応答も
受け持ちます。そして編集が終わったら、該当する
Todo
項目を表すモデルを更新します。
JavaScript
による
MVC
フレームワークのほとんどで、コントローラについては本来の
MVC
パ
ターンからの逸脱が見られます。これにはさまざまな事情が考えられます。大きな理由としては、
おそらく開発者はサーバ側での
MVC
の実装（
Ruby on Rails
など）に慣れ親しんでおり、そこでの
アプローチがクライアント側に
1
対
1
で適用できるわけではないことに気づいたのではないでしょ
うか。そこでコントローラについて独自の解釈を行い、内部状態の管理にまつわる問題の解決を試
みたのだと推測されます。これは賢いアプローチではあるのですが、
MVC
に初めて触れる開発者
にとっては本来の
MVC
パターンや非
JavaScript
の
MVC
フレームワークでのコントローラの役割
を理解しようとする際に障害となります。
さて、
Backbone.js
にはコントローラが存在するのかというと実は存在していません。通常は、
Backbone.js
でのビューにはコントローラに相当するロジックが含まれており、ルーターがアプリ
ケーションの状態管理を補助しています。しかしこれらはいずれも、本来の意味でのコントローラ
ではありません。
この観点に立つと
Backbone.js
は、公式ドキュメントやブログで述べられている
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.