July 2016
Intermediate to advanced
384 pages
10h 11m
Japanese
Content preview from CSSシークレット ―47のテクニックでCSSを自在に操る
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こうすれば、 background‐sizeや background‐repeatを変更した
い場合に1 か所を修正するだけで済みます。同様のテクニックは、本書全
体を通じて何度も使われることになります。
プリプロセッサを使うべきか
LESS（lesscss.org） や Sass（ sass‐lang.com） あ る い は Stylus
（stylus‐lang.com/）などのプリプロセッサについて聞いたことがある
読者も多いでしょう。これらは、 CSSを記述するための便利な機能を提供
しています。例えば変数、ミックスイン、関数、入れ子構造のルール、色
の操作などの機能を利用できます。
CSS単体では大規模プロジェクトでコードの柔軟性を保つのは困難です
が、プリプロセッサを適切に利用すればこれが可能になります。頑健で柔
軟かつDRY な CSSを記述しようとしても、CSSの仕様自体に努力を妨げら
れることがあります。ただし、プリプロセッサも以下のような問題を抱え
ています。
background:url(tr.png)topright,
url(br.png)bottomright,
url(bl.png)bottomleft;
background‐size:2em2em;
background‐repeat:no‐repeat;
CSSのファイルサイズや複雑さをコントロールできなくなります。簡潔に
記述された小さなコードが、巨大な ...
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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.