The valueOf() method of Date instances returns the number of milliseconds for this date since the epoch, which is defined as the midnight at the beginning of January 1, 1970, UTC.

# Contributors by commit history https://github.com/mdn/content/commits/main/files/en-us/web/javascript/reference/global_objects/date/index.md # Original Wiki contributors MendyBerger chrisdavidmil...

The entries() method of Map instances returns a new map iterator object that contains the [key, value] pairs for each element in this map in insertion order.

The Symbol.hasInstance static data property represents the well-known symbol Symbol.hasInstance. The instanceof operator looks up this symbol on its right-hand operand for the method used to determine if the constructor object recognizes an object as its instance.

The set() method of Map instances adds or updates an entry in this map with a specified key and a value.

The String.raw() static method is a tag function of template literals. This is similar to the r prefix in Python, or the @ prefix in C# for string literals. It's used to get the raw string form of template literals — that is, substitutions (e.g., ${foo}) are processed, but escape sequences (e.g., \n) are not.

The big() method of String values creates a string that embeds this string in a <big> element (<big>str</big>), which causes this string to be displayed in a big font.

The blink() method of String values creates a string that embeds this string in a <blink> element (<blink>str</blink>), which used to cause a string to blink in old browsers.

The Temporal.ZonedDateTime object represents a date and time with a time zone. It is fundamentally represented as a combination of an instant, a time zone, and a calendar system.

The toLocaleString() method of Date instances returns a string with a language-sensitive representation of this date in the local timezone. In implementations with Intl.DateTimeFormat API support, this method delegates to Intl.DateTimeFormat.