Baseline Widely available
Date.UTC()
ã¯éçã¡ã½ããã§ã Date
ã³ã³ã¹ãã©ã¯ã¿ã¼ã¨åæ§ã«æ¥ä»ã¨æå»ã®è¦ç´ ã表ã弿°ãåãå
¥ãã¾ããããããã UTC ã¨ãã¦æ±ãã¾ãã 1970 å¹´ 1 æ 1 æ¥ 00:00:00 UTC ããã®ããªç§æ°ãè¿ãã¾ãã
const utcDate1 = new Date(Date.UTC(96, 1, 2, 3, 4, 5));
const utcDate2 = new Date(Date.UTC(0, 0, 0, 0, 0, 0));
console.log(utcDate1.toUTCString());
// äºæ³ãããçµæ: "Fri, 02 Feb 1996 03:04:05 GMT"
console.log(utcDate2.toUTCString());
// äºæ³ãããçµæ: "Sun, 31 Dec 1899 00:00:00 GMT"
æ§æ
Date.UTC(year)
Date.UTC(year, monthIndex)
Date.UTC(year, monthIndex, day)
Date.UTC(year, monthIndex, day, hours)
Date.UTC(year, monthIndex, day, hours, minutes)
Date.UTC(year, monthIndex, day, hours, minutes, seconds)
Date.UTC(year, monthIndex, day, hours, minutes, seconds, milliseconds)
弿°
year
æ´æ°å¤ã§ãå¹´ã表ãã¾ãã 0
ãã 99
ã¾ã§ã®å¤ã¯ 1900
ãã 1999
ã¾ã§ã«å¯¾å¿ä»ãããã¾ãããã以å¤ã®å¤ã¯ãã¹ã¦ãå®éã®å¹´ã表ãã¾ããä¾ãåç
§ãã¦ãã ããã
monthIndex
çç¥å¯
æãè¡¨ãæ´æ°ã§ã 0
(1 æ) ããå§ã¾ãã 11
(12 æ) ã¾ã§ã§ããæ¢å®å¤ã¯ 0
ã§ãã
day
çç¥å¯
ãæ¥ãã表ã 1
ãã 31
ã¾ã§ã®æ´æ°å¤ãæ¢å®å¤ã¯ 1
ã§ãã
hours
çç¥å¯
ãæãã表ã 0
ãã 23
ã¾ã§ã®æ´æ°å¤ãæ¢å®å¤ã¯ 0
ã§ãã
minutes
çç¥å¯
ãåãã表ã 0
ãã 59
ã¾ã§ã®æ´æ°å¤ãæ¢å®å¤ã¯ 0
ã§ãã
seconds
çç¥å¯
ãç§ãã表ã 0
ãã 59
ã¾ã§ã®æ´æ°å¤ãæ¢å®å¤ã¯ 0
ã§ãã
milliseconds
çç¥å¯
ãããªç§ãã表ã 0
ãã 999
ã¾ã§ã®æ´æ°å¤ãæ¢å®å¤ã¯ 0
ã§ãã
æå®ãããæ¥æã®ã¿ã¤ã ã¹ã¿ã³ããè¡¨ãæ°å¤ãè¿ãã¾ããæ¥æãç¡å¹ãªå ´å㯠NaN
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0
ãã 99
ã¾ã§ã®å¹´ã¯ã 20 ä¸ç´ã®å¹´ (1900 + year)
ã«å¤æããã¾ããä¾ãã°ã 95
㯠1995 å¹´ã«å¤æããã¾ãã
ãã® UTC()
ã¡ã½ãã㯠Date()
ã³ã³ã¹ãã©ã¯ã¿ã¼ã¨ 3 ã¤ã®ç¹ã§ç°ãªãã¾ãã
Date.UTC()
ã¯å°æ¹æã§ã¯ãªããåå®ä¸çæãç¨ãã¾ããDate.UTC()
㯠Date
ãªãã¸ã§ã¯ããçæãããæå»å¤ãæ´æ°ã§è¿ãã¾ããDate.UTC()
ã¯ãããã¿ã¤ã ã¹ã¿ã³ãã§ã¯ãªãå¹´ã¨ãã¦è§£éãã¾ãã弿°ãæ¥æã«æå¾
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ãã¦ããå ´åã UTC()
ã¡ã½ããã¯æå®ããå¤ãåãå
¥ããããä»ã®å¼æ°ãæ´æ°ãã¾ããä¾ãã° 15
ã monthIndex
ã«ä½¿ç¨ãããå ´åãå¹´ã 1 ã¤å¢å ã (year + 1)
ãæã«ã¯ 3
ã使ããã¾ãã
UTC()
㯠Date
ã®éçã¡ã½ãããªã®ã§ã Date
ã¤ã³ã¹ã¿ã³ã¹ã®ã¡ã½ããã¨ãã¦ã§ã¯ãªãã常㫠Date.UTC()
ã®ããã«ä½¿ç¨ãã¦ãã ããã
以ä¸ã®æã§ã¯ãå°æ¹æã®ä»£ããã« UTC ãç¨ã㦠Date
ãªãã¸ã§ã¯ããçæãã¾ãã
const utcDate = new Date(Date.UTC(2018, 11, 1, 0, 0, 0));
Date.UTC() ã®å¼æ°ã 1 ã¤ã§ãã£ãå ´åã®åä½
Date.UTC()
ã« 1 ã¤ã®å¼æ°ã渡ãã¨ãå®è£
ã Date()
ã³ã³ã¹ãã©ã¯ã¿ã¼ã¨ã®æ´åæ§ãä¿ã¤ãããåä¸ã®å¼æ°ãå¹´ã¨ãã¦è§£éãããåä½ã«ä¸æ´åãçãã¦ãã¾ãããå®è£
ã¯ã monthIndex
ãçç¥ãããã¨ãã« NaN
ã«å¼·å¶å¤æããã®ã§ã¯ãªãã0
ã¨ãã¦æ±ããã¨ã«ãªãã¾ããã
Date.UTC(2017); // 1483228800000
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