May 2019
Intermediate to advanced
464 pages
9h 22m
Japanese
Content preview from Node.jsデザインパターン 第2版
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8.4
React
の紹介
267
8.4
React
の紹介
この章ではこれ以降
React
（
ReactJS
）を使います。これはもともと
Facebook
が公開した
JavaScript
ラ
イブラリ（
http://facebook.github.io/react/
）で、アプリケーションにビューレイヤーを構築する、関
数とツールの総合的なセットを提供するものです。
React
は、コンポーネントの概念に焦点を合わせた
抽象化されたビューを提供しており、コンポーネントはボタン、フォームの入力フィールド、
HTML
の
div
のような単純なコンテナなど、ユーザーインタフェース内のどのような要素でもかまいません。基
本的な考えは、アプリケーションのユーザーインタフェースを、再利用性の高い特定の機能をもったコ
ンポーネントを使って定義し組み合わせるだけで作成しようというものです。
React
がその他のウェブ用のビュー実装系と違っているのは
、デザイン上、
DOM
に縛られないとこ
ろです。実際、「バーチャル
DOM
」と呼ばれる高レベルの抽象化を提供しており、ウェブにぴったり適
合するばかりでなく、たとえばモバイルアプリの構築、
3D
環境のモデリング、さらにはハードウェア
コンポーネント間の相互作用の定義といった、別の文脈でも使用できます。
Learn it once, use it everywhere
（習うのは一度だけ、使うのはどこでも）
−
Facebook
こ れ は
Facebook
が
React
を 紹 介 す る とき に よ く 使
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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.