Baseline Widely available
toString()
㯠Date
ã¤ã³ã¹ã¿ã³ã¹ã®ã¡ã½ããã§ããã®æ¥æãå°æ¹æã§è§£éãããã®ã表ãæååãè¿ãã¾ãã
const event = new Date("August 19, 1975 23:15:30");
console.log(event.toString());
// äºæ³ãããçµæ: "Tue Aug 19 1975 23:15:30 GMT+0200 (CEST)"
// ã¡ã¢: ã¿ã¤ã ã¾ã¼ã³ã¯å¤åããå ´åãããã¾ã
æ§æ 弿°
ãªãã
è¿å¤æå®ãããæ¥æã表ãæååï¼æ¸å¼ã«ã¤ãã¦ã¯è§£èª¬ãåç
§ï¼ãæ¥ä»ãç¡å¹ã§ããå ´å㯠null
ã§ãã
toString()
ã¡ã½ããã¯ãå夿ãããã³ã«ã®ä¸é¨ã§ãã Date
ã«ã¯ [Symbol.toPrimitive]()
ã¡ã½ãããããããã Date
ãªãã¸ã§ã¯ããæé»çã«æååã¸å¤æãããå ´åããã®ã¡ã½ããã常㫠toString()
ãããåªå
ããã¾ãããã ãã Date.prototype[Symbol.toPrimitive]()
ã¯ãå
é¨ã§ã¯ä¾ç¶ã¨ã㦠this.toString()
ãå¼ã³åºãã¾ãã
Date
ãªãã¸ã§ã¯ãã¯ã Object
ã® toString()
ã¡ã½ããã䏿¸ããã¾ãããã®æååã¯ãæ¥ä»ã¨æå»ã®ä¸¡æ¹ãå«ã¾ãã¦ããã toDateString()
㨠toTimeString()
ã§æå®ãããæåå表ç¾ããéã«ç©ºç½ãå
¥ãã¦çµåããããã®ã§ããä¾ãã°ã "Thu Jan 01 1970 00:00:00 GMT+0000 (Coordinated Universal Time)" ã®ããã«ãªãã¾ãã
Date.prototype.toString()
㯠Date
ã¤ã³ã¹ã¿ã³ã¹ã«å¯¾ãã¦å¼ã³åºãããªããã°ãªãã¾ããããã this
å¤ã Date.prototype
ãç¶æ¿ãã¦ããªãå ´åã TypeError
ãçºçãã¾ãã
toDateString()
ã使ç¨ãã¦ãã ãããtoTimeString()
ã使ç¨ãã¦ãã ãããtoUTCString()
ã使ç¨ãã¦ãã ãããtoLocaleString()
ã使ç¨ãã¦ãã ãããconst d = new Date(0);
console.log(d.toString()); // "Thu Jan 01 1970 00:00:00 GMT+0000 (Coordinated Universal Time)"
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