Baseline Widely available
setFullYear()
㯠Date
ã¤ã³ã¹ã¿ã³ã¹ã®ã¡ã½ããã§ãå°æ¹æã«åºã¥ããæãåãç§ãããªç§ã夿´ãã¾ãã
const event = new Date("August 19, 1975 23:15:30");
event.setHours(20);
console.log(event);
// äºæ³ãããçµæ: "Tue Aug 19 1975 20:15:30 GMT+0200 (CEST)"
// ã¡ã¢: æé帯ã¯å¤åãã¾ã
event.setHours(20, 21, 22);
console.log(event);
// äºæ³ãããçµæ: "Tue Aug 19 1975 20:21:22 GMT+0200 (CEST)"
æ§æ
setHours(hoursValue)
setHours(hoursValue, minutesValue)
setHours(hoursValue, minutesValue, secondsValue)
setHours(hoursValue, minutesValue, secondsValue, msValue)
弿°
hoursValue
ãæãã表ã 0 ãã 23 ã¾ã§ã®éã®æ´æ°å¤ã§ãã
minutesValue
çç¥å¯
ãåãã表ã 0 ãã 59 ã¾ã§ã®éã®æ´æ°å¤ã§ãã
secondsValue
çç¥å¯
ãç§ãã表ã 0 ãã 59 ã¾ã§ã®éã®æ´æ°å¤ã§ãã secondsValue
弿°ãæå®ããå ´åã¯ã minutesValue
ãæå®ããªããã°ãªãã¾ããã
msValue
ããªç§ã表ã 0 ãã 999 ã¾ã§ã®éã®æ´æ°å¤ã§ãã999 ããã大ããªå¤ãæå®ãããå ´åã¯ãæ¥æã¯è¿½å ã®ããªç§æ°ã ãå¢å ãã¾ããmsValue
弿°ãæå®ããå ´åã minutesValue
㨠secondsValue
ãæå®ããªããã°ãªãã¾ããã
ãã®å ´ã§ Date
ãªãã¸ã§ã¯ãã夿´ããæ°ããã¿ã¤ã ã¹ã¿ã³ããè¿ãã¾ãã弿°ã NaN
ï¼ã¾ã㯠undefined
ãªã©ã NaN
ã«å¤æããããã®ä»ã®å¤ï¼ã®å ´åãæ¥ä»ã¯ç¡å¹ãªæ¥æã«è¨å®ããã NaN
ãè¿ããã¾ãã
minutesValue
, secondsValue
ããã³ msValue
弿°ãæå®ããªãã£ãå ´åãgetMinutes()
ãgetSeconds()
ãgetMilliseconds()
ã¡ã½ããããè¿ãããå¤ã使ããã¾ãã
æå®ããå¤ãæå¾
ãããæ¥ä»ã®ç¯å²å¤ã®å ´åãããã«å¿ã㦠setHours()
ãä»ã®å¼æ°ã¨ Date
ãªãã¸ã§ã¯ãã®æ¥ä»æ
å ±ã®æ´æ°ã試ã¿ã¾ããä¾ãã°ãsecondsValue
ã« 100 ãæå®ããå ´åãåã« 1 å ç® (minutesValue + 1
) ãããç§ã 40 ã«ãªãã¾ãã
const theBigDay = new Date();
theBigDay.setHours(7);
仿§æ¸ ãã©ã¦ã¶ã¼ã®äºææ§ é¢é£æ
å ±
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