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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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.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.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.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.
課題
兄弟要素の個数に応じて、異なるスタイルを指定したいケースは多数あ
ります。主な利用例としては、長さが可変のリストが考えられます。リス
トが長くなった場合に、ウィジェットを非表示にしたりそれぞれの項目を
小さくしたりして、表示領域を節約するとともにユーザーエクスペリエン
スを向上できます。具体的をいくつか紹介します。
兄弟要素の個数に
もとづくスタイル指定
38
電子メールなどのテキストベースの項目からなるリスト。項目が少ない場
合、各項目は大きなプレビュー領域とともに表示されます。項目が増えた
ら、プレビュー領域の行数を減らします。そしてリスト全体の高さがビ
ューポートの高さを超えたら、プレビュー領域を非表示にし、ボタンを小
さくします。こうすることによって、ユーザーがスクロールしなければな
らない量を削減します。
ToDoリストアプリケーション。項目が少ない間は大きなフォントで表示
し、増えてきたら徐々にすべての項目を小さなフォントで表示するように
します。
カラーパレットアプリケーション。それぞれの色はウィジェットとして表
示されます。色数が増えるのに合わせてウィジェットを小さくし、占有す
るスペースを減らします（図7.7 ）。
複数の<textarea>を持つアプリケーション。新しく追加されるたびに、
す べ て の <textarea>の 列 数 を 少 し ず つ 小 さ く し ま す 。
bytesizematters.comなどでこの手法が使われています。
300
7章：ページの構造とレイアウト
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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.