The byteLength accessor property of ArrayBuffer instances returns the length (in bytes) of this array buffer.

The Atomics.compareExchange() static method exchanges a given replacement value at a given position in the array, if a given expected value equals the old value. It returns the old value at that position whether it was equal to the expected value or not. This atomic operation guarantees that no other write happens until the modified value is written back.

The Atomics.waitAsync() static method waits asynchronously on a shared memory location and returns a Promise.

The Atomics.wait() static method verifies that a shared memory location still contains a given value and if so sleeps, awaiting a wake-up notification or times out. It returns a string which is either "ok", "not-equal", or "timed-out".

The Atomics.or() static method computes a bitwise OR with 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 optional displayName property of a Function instance specifies the display name of the function.

The fileName data property of an Error instance contains the path to the file that raised this error.

The __proto__ accessor property of Object instances exposes the [[Prototype]] (either an object or null) of this object.

The AggregateError() constructor creates AggregateError objects.

The Object.isExtensible() static method determines if an object is extensible (whether it can have new properties added to it).