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:future - CSS: カスケーディングスタイルシート | MDN
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このページはコミュニティーの尽力で英語から翻訳されました。MDN Web Docs コミュニティーについてもっと知り、仲間になるにはこちらから。
:future
Limited availability
This feature is not Baseline because it does not work in some of the most widely-used browsers.
:future は CSS の擬似クラスセレクターで、 :current に一致する要素の後に完全に現れる要素と一致する、時間軸の擬似クラスです。例えば、 WebVTT によって表示されているキャプションに対応する動画などです。
css
:future(p, span) {
display: none;
}
構文
css
:future {
/* ... */
}
例
CSS
css
:future(p, span) {
display: none;
}
HTML
html
<video controls preload="metadata">
<source src="video.mp4" type="video/mp4" />
<source src="video.webm" type="video/webm" />
<track
label="English"
kind="subtitles"
srclang="en"
src="subtitles.vtt"
default />
</video>
WebVTT
WEBVTT FILE 1 00:00:03.500 --> 00:00:05.000 これは最初のキャプションです 2 00:00:06.000 --> 00:00:09.000 これは 2 つ目のキャプションです 3 00:00:11.000 --> 00:00:19.000 これは 3 つ目のキャプションです
仕様書
| Specification |
|---|
| Selectors Level 4 # the-future-pseudo |
ブラウザーの互換性
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