The with() method of TypedArray instances is the copying version of using the bracket notation to change the value of a given index. It returns a new typed array with the element at the given index replaced with the given value. This method has the same algorithm as Array.prototype.with().

The map() method of TypedArray instances creates a new typed array populated with the results of calling a provided function on every element in the calling typed array. This method has the same algorithm as Array.prototype.map().

The reduceRight() method of TypedArray instances applies a function against an accumulator and each value of the typed array (from right-to-left) to reduce it to a single value. This method has the same algorithm as Array.prototype.reduceRight().

The Intl.DisplayNames object enables the consistent translation of language, region and script display names.

The Intl.DateTimeFormat object enables language-sensitive date and time formatting.

The setBigUint64() method of DataView instances takes a BigInt and stores it as a 64-bit unsigned integer in the 8 bytes starting at the specified byte offset of this DataView. There is no alignment constraint; multi-byte values may be stored at any offset within bounds.

The setInt8() method of DataView instances takes a number and stores it as an 8-bit signed integer in the byte at the specified byte offset of this DataView.

The getInt16() method of DataView instances reads 2 bytes starting at the specified byte offset of this DataView and interprets them as a 16-bit signed integer. There is no alignment constraint; multi-byte values may be fetched from any offset within bounds.

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

The Date() constructor creates Date objects. When called as a function, it returns a string representing the current time.