Date 对象
JavaScript Date objects represent a single moment in time in a platform-independent format. Date objects contain a Number that represents milliseconds since 1 January 1970 UTC.
Constructor
new Date()
When called as a constructor, returns a new Date object.
Date()
When called as a function, returns a string representation of the current date and time, exactly as new Date().toString() does.
1 | Date() // 'Sun Dec 11 2022 00:38:05 GMT+0800 (中国标准时间)' |
Static Methods
Date.now()
Returns the numeric value corresponding to the current time—the number of milliseconds elapsed since January 1, 1970 00:00:00 UTC, with leap seconds ignored.
1 | Date.now() // 1670745980856 |
Date.parse()
Parses a string representation of a date and returns the number of milliseconds since 1 January, 1970, 00:00:00 UTC, with leap seconds ignored.
1 | Date.parse('Sun Dec 11 2022 00:38:05 GMT+0800 (中国标准时间)') // 1670690285000 |
Note: Parsing of strings with Date.parse is strongly discouraged due to browser differences and inconsistencies.
Instance Methods
Date.prototype.getDate()
Returns the day of the month (1–31) for the specified date according to local time.
1 | new Date().getDate() // 11 |
Date.prototype.getDay()
Returns the day of the week (0–6) for the specified date according to local time.
1 | new Date().getDay() // 0 |
Date.prototype.getFullYear()
Returns the year (4 digits for 4-digit years) of the specified date according to local time.
1 | new Date().getFullYear() // 2022 |
Date.prototype.getHours()
Returns the hour (0–23) in the specified date according to local time.
1 | new Date().getHours() // 16 |
Date.prototype.getMilliseconds()
Returns the milliseconds (0–999) in the specified date according to local time.
Date.prototype.getMinutes()
Returns the minutes (0–59) in the specified date according to local time.
Date.prototype.getMonth()
Returns the month (0–11) in the specified date according to local time.
Date.prototype.getSeconds()
Returns the seconds (0–59) in the specified date according to local time.
Date.prototype.getTime()
Returns the numeric value of the specified date as the number of milliseconds since January 1, 1970, 00:00:00 UTC. (Negative values are returned for prior times.)
1 | new Date().getTime() // 1670746028587 |
Date.prototype.getTimezoneOffset()
Returns the time-zone offset in minutes for the current locale.
1 | new Date().getTimezoneOffset() // -480 |
Date.prototype.getUTCDate()
Returns the day (date) of the month (1–31) in the specified date according to universal time.
Date.prototype.getUTCDay()
Returns the day of the week (0–6) in the specified date according to universal time.
Date.prototype.getUTCFullYear()
Returns the year (4 digits for 4-digit years) in the specified date according to universal time.
Date.prototype.getUTCHours()
Returns the hours (0–23) in the specified date according to universal time.
Date.prototype.getUTCMilliseconds()
Returns the milliseconds (0–999) in the specified date according to universal time.
Date.prototype.getUTCMinutes()
Returns the minutes (0–59) in the specified date according to universal time.
Date.prototype.getUTCMonth()
Returns the month (0–11) in the specified date according to universal time.
Date.prototype.getUTCSeconds()
Returns the seconds (0–59) in the specified date according to universal time.