The DataView() constructor creates DataView objects.

The buffer accessor property of DataView instances returns the ArrayBuffer or SharedArrayBuffer referenced by this view at construction time.

The getFloat64() method of DataView instances reads 8 bytes starting at the specified byte offset of this DataView and interprets them as a 64-bit floating point number. There is no alignment constraint; multi-byte values may be fetched from any offset within bounds.

The Temporal.Instant object represents a unique point in time, with nanosecond precision. It is fundamentally represented as the number of nanoseconds since the Unix epoch (midnight at the beginning of January 1, 1970, UTC), without any time zone or calendar system.

The setMilliseconds() method of Date instances changes the milliseconds for this date according to local time.

The epochMilliseconds accessor property of Temporal.Instant instances returns an integer representing the number of milliseconds elapsed since the Unix epoch (midnight at the beginning of January 1, 1970, UTC) to this instant. It is equivalent to dividing epochNanoseconds by 1e6 and flooring the result.

The toDateString() method of Date instances returns a string representing the date portion of this date interpreted in the local timezone.

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

The toUTCString() method of Date instances returns a string representing this date in the RFC 7231 format, with negative years allowed. The timezone is always UTC. toGMTString() is an alias of this method.

The parseInt() function parses a string argument and returns an integer of the specified radix (the base in mathematical numeral systems).