Baseline Widely available *
TextTrack
ã¤ã³ã¿ã¼ãã§ã¤ã¹ã¯ â WebVTT (ã¡ãã£ã¢è¡¨ç¤ºä¸ã®ããã¹ããã©ãã¯) ãæ±ã API ã®ä¸é¨ã§ãã â ç¹å®ã® <track>
è¦ç´ ã«é¢é£ä»ããããããã¹ããã©ãã¯ãè¨è¿°ããã³å¶å¾¡ãã¾ãã
ãã®ã¤ã³ã¿ã¼ãã§ã¤ã¹ã¯ EventTarget
ããããããã£ãç¶æ¿ãã¦ãã¾ãã
TextTrack.activeCues
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ç¾å¨ã¢ã¯ãã£ããªããã¹ããã©ãã¯ãã¥ã¼ã®ã»ããããªã¹ããã TextTrackCueList
ãªãã¸ã§ã¯ããã¡ãã£ã¢ã®ç¾å¨ã®åçä½ç½®ããã¥ã¼ã®éå§æéã¨çµäºæéã®éã«ããå ´åããã©ãã¯ãã¥ã¼ã¯ã¢ã¯ãã£ãã§ããã¤ã¾ãããã£ãã·ã§ã³ãåå¹ã®ãããªè¡¨ç¤ºããããã¥ã¼ã§ã¯ãã¢ã¯ãã£ããã¥ã¼ãç¾å¨è¡¨ç¤ºããã¦ãããã®ã§ãã
TextTrack.cues
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ãã©ãã¯ã®ãã¹ã¦ã®ãã¥ã¼ãå«ã TextTrackCueList
ã
TextTrack.id
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ãã©ãã¯ãããå ´åã¯ããããèå¥ããæååã§ãã ID ããªãå ´åããã®å¤ã¯ç©ºæåå (""
) ã§ãã TextTrack
ã <track>
è¦ç´ ã«é¢é£ä»ãããã¦ããå ´åããã©ãã¯ã® ID ã¯è¦ç´ ã® ID ã¨ä¸è´ãã¾ãã
TextTrack.inBandMetadataTrackDispatchType
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æååã§ããã©ãã¯ã®å¸¯åå ã¡ã¿ãã¼ã¿ãã©ãã¯ãã£ã¹ããã種å¥ã示ãã¾ãã
TextTrack.kind
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æååã§ã TextTrack
ãè¨è¿°ããããã¹ããã©ãã¯ã® kind ã示ãã¾ãã å¤ã¯è¨±å¯ããã¦ããå¤ã®ä½ããã§ãªããã°ãªãã¾ããã
TextTrack.label
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ããã¹ããã©ãã¯ã®ã©ãã«ãããã°ããããå«ã人éãèªããæååã§ãã ãã以å¤ã®å ´åãããã¯ç©ºæåå (""
) ã«ãªãã¾ãã 空æååã®å ´åããã©ãã¯ã®ã©ãã«ãã¦ã¼ã¶ã¼ã«å
¬éããå¿
è¦ãããå ´åã¯ããã©ãã¯ã®ä»ã®å±æ§ã使ç¨ãã¦ã³ã¼ãã§ã«ã¹ã¿ã ã©ãã«ãçæããå¿
è¦ãããã¾ãã
TextTrack.language
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æååã§ãããã¹ããã©ãã¯ã®å
å®¹ãæ¸ããã¦ããããã¹ãè¨èªãæå®ãã¾ãã å¤ã¯ãHTML ã® lang
屿§ã¨åãããã«ã RFC 5646: Tags for Identifying Languages (BCP 47 ã¨ã) ã§æå®ããã¦ããå½¢å¼ã«æºæ ããå¿
è¦ãããã¾ãã ä¾ãã°ãç±³å½è±èªã®å ´å㯠"en-US"
ããã©ã¸ã«ãã«ãã¬ã«èªã®å ´å㯠"pt-BR"
ã«ãªãã¾ãã
TextTrack.mode
æååã§ããã©ãã¯ã®ç¾å¨ã®ã¢ã¼ããæå®ãã¾ãã ãã®ããããã£ã®å¤ã夿´ããã¨ããã©ãã¯ã®ç¾å¨ã®ã¢ã¼ããä¸è´ããããã«å¤æ´ããã¾ãã 許容å¤ã¯ããã¹ããã©ãã¯ã¢ã¼ã宿°ã«ãªã¹ãããã¦ãã¾ããæ¢å®å¤ã¯ disabled
ã§ããã <track>
è¦ç´ ã® default
è«ç屿§ãæå®ããã¦ããå ´åã¯ãæ¢å®ã®ã¢ã¼ã㯠started
ã«ãªãã¾ãã
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ãããã¡ã½ãããç¶æ¿ãã¦ãã¾ãã
ã¡ã¢: TextTrackCue
ã¤ã³ã¿ã¼ãã§ã¤ã¹ã¯ã VTTCue
ãªã©ã®ä»ã®ãã¥ã¼ã¤ã³ã¿ã¼ãã§ã¤ã¹ã®è¦ªã¯ã©ã¹ã¨ãã¦ä½¿ç¨ãããæ½è±¡ã¯ã©ã¹ã§ãããããã£ã¦ããã¥ã¼ã追å ã¾ãã¯åé¤ããå ´åã¯ãTextTrackCue
ãç¶æ¿ãããã¥ã¼ã®ç¨®é¡ã®ãããããå
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TextTrack.addCue()
(TextTrackCue
ãªãã¸ã§ã¯ãã¨ãã¦æå®ããã) ãã¥ã¼ããã©ãã¯ã®ãã¥ã¼ã®ãªã¹ãã«è¿½å ãã¾ãã
TextTrack.removeCue()
ãã©ãã¯ã®ãã¥ã¼ã®ãªã¹ããã (TextTrackCue
ãªãã¸ã§ã¯ãã¨ãã¦æå®ããã) ãã¥ã¼ãåãé¤ãã¾ãã
cuechange
ãã¥ã¼ãåºå
¥ãããã¨ãã«çºçãã¾ãã ç¹å®ã®ããã¹ããã¥ã¼ã¯ããã¥ã¼ã«å
¥ãã¨è¡¨ç¤ºããããã¥ã¼ããåºãã¨æ¶ãã¾ãã oncuechange
ããããã£ãããå©ç¨ã§ãã¾ãã
以ä¸ã®ä¾ã¯ãæ°ãã TextTrack
ãåç»ã«è¿½å ãã TextTrack.mode
ã使ç¨ãã¦è¡¨ç¤ºããããã«è¨å®ãã¾ãã
let video = document.querySelector("video");
let track = video.addTextTrack("captions", "Captions", "en");
track.mode = "showing";
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