:future
:future CSS 伪类选择器是一种时间维度伪类,它将匹配在匹配 :current 的元素之后完全出现的任何元素。例如,在通过 WebVTT 显示字幕的视频中。
css
:future(p, span) {
  display: none;
}
语法
css
:future {
  /* ... */
}
示例
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 This is the first caption 2 00:00:06.000 --> 00:00:09.000 This is the second caption 3 00:00:11.000 --> 00:00:19.000 This is the third caption
规范
| 规范 | 
|---|
| 选择器 Level 4 # the-future-pseudo | 
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