:future

:future is a CSS pseudo-selector we can use to style upcoming elements during media playback. Think subtitles in videos. We can use this to style subtitles that are coming up next to separate them visually from the currently displayed subtitle

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:past

:past is a CSS pseudo-selector that matches elements that have passed along a timeline. Where you’ll see this come into play is largely with video subtitles created with WebVTT. When a subtitle is no longer the currently displayed text, it …

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