Otherwise, the resulting primitive is further coerced to a number and treated as a timestamp. If the result is a string, it will be parsed as a date string. All other values are converted to primitives. When one parameter is passed to the Date() constructor, Date instances are specially treated. This is equivalent to new Date(dateObject.valueOf()), except the valueOf() method is not called. This effectively makes a copy of the existing Date object with the same date and time. Date object dateObjectĪn existing Date object. You are therefore also advised to make sure the input format is consistent between the two types. "") are treated as UTC, while date-time strings (e.g. A library can help if many different formats are to be accommodated.ĭate-only strings (e.g. Support for RFC 2822 format strings is by convention only. Note: When parsing date strings with the Date constructor (and Date.parse, they are equivalent), always make sure that the input conforms to the ISO 8601 format ( YYYY-MM-DDTHH:mm:ss.sssZ) - the parsing behavior with other formats is implementation-defined and may not work across all browsers. Object.prototype._lookupSetter_() Deprecated. ![]()
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