Baseline Widely available
setTime()
㯠Date
ã¤ã³ã¹ã¿ã³ã¹ã®ã¡ã½ããã§ããã®æ¥ä»ã®ã¿ã¤ã ã¹ã¿ã³ãã夿´ãã¾ããããã¯ã UTC ã® 1970 å¹´ 1 æ 1 æ¥åå 0 æãå
æã¨ãã¦å®ç¾©ããããå
æããã®ããªç§æ°ã§ãã
const launchDate = new Date("July 1, 1999, 12:00:00");
const futureDate = new Date();
futureDate.setTime(launchDate.getTime());
console.log(futureDate);
// äºæ³ãããçµæ: "Thu Jul 01 1999 12:00:00 GMT+0200 (CEST)"
const fiveMinutesInMs = 5 * 60 * 1000;
futureDate.setTime(futureDate.getTime() + fiveMinutesInMs);
console.log(futureDate);
// äºæ³ãããçµæ: "Thu Jul 01 1999 12:05:00 GMT+0200 (CEST)"
// ã¡ã¢: æé帯ã¯å¤æ´ããããã¨ãããã¾ãã
æ§æ 弿°
timeValue
æ°ããã¿ã¤ã ã¹ã¿ã³ããè¡¨ãæ´æ°ã§ãåå®ä¸çæ (UTC) 1970 å¹´ 1 æ 1 æ¥ 00:00:00 ããã®ããªç§æ°ã§ãã
ãã®å ´ã§ Date
ãªãã¸ã§ã¯ãã夿´ããæ°ããã¿ã¤ã ã¹ã¿ã³ããè¿ãã¾ãã timeValue
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
const theBigDay = new Date("1999-07-01");
const sameAsBigDay = new Date();
sameAsBigDay.setTime(theBigDay.getTime());
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