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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知っておくべきポイント
基本的なCSSトランジション、基本的なCSSアニメーション
課題
弾むようなトランジションやアニメーションは、楽しくかつリアルなイ
ンタフェースを作成するためにしばしば使われます。実世界の物体が速度
を変えずに移動することはほとんどありません。
技術的には、弾むような効果は以下のように説明できます。初回のトラ
ンジションが終点に達すると、逆方向へのトランジションが発生します。
その後は移動量を少しずつ小さくしながらトランジションが繰り返され、
最終的にはまったく移動しなくなります。例えば図8.1の弾むボールのア
ニメーションでは、ゼロから 350pxへと translateY()トランスフォー
ムが変化します。
位置の移動以外にも、同様の弾むようなふるまいは見られます。以下の
例をはじめとして、ほぼすべての種類のトランジションに適用できます。
弾むような動きの
トランジション
42
サ イ ズ の 変 化 。 ホ バーさ れ た 要 素 を 拡 大 し た り 、 transform:
scale(0)の状態からポップアップ表示を行ったり、棒グラフでそれぞれ
の棒をアニメーションとともに表示したりできます。
角度を使った動き。回転や、値がゼロから増えていく円グラフなど。
324
8章：トランジションとアニメーション
ここでは margin‐topなどのプロパ
ティは使っていません。これらはピク
セル間の境界を飛び飛びに進むように
表示されることがあります。トランス
フォームを使うほうが、スムーズな表
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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.