The Float64Array() constructor creates Float64Array objects. The contents are initialized to 0.

The Atomics.add() static method adds a given value at a given position in the array and returns the old value at that position. This atomic operation guarantees that no other write happens until the modified value is written back.

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 segment() method of Intl.Segmenter instances segments a string according to the locale and granularity of this Intl.Segmenter object.

The JSON.rawJSON() static method creates a "raw JSON" object containing a piece of JSON text. When serialized to JSON, the raw JSON object is treated as if it is already a piece of JSON. This text is required to be valid JSON.

The Uint16Array() constructor creates Uint16Array objects. The contents are initialized to 0.

The Promise.withResolvers() static method returns an object containing a new Promise object and two functions to resolve or reject it, corresponding to the two parameters passed to the executor of the Promise() constructor.

The toString() method of RegExp instances returns a string representing this regular expression.

The RegExp.rightContext static accessor property returns the substring following the most recent match. RegExp["$'"] is an alias for this property.

The RegExp.input static accessor property returns the string against which a regular expression is matched. RegExp.$_ is an alias for this property.