The keys() method of Set instances is an alias for the values() method.

The entries() method of Set instances returns a new set iterator object that contains an array of [value, value] for each element in this set, in insertion order. For Set objects there is no key like in Map objects. However, to keep the API similar to the Map object, each entry has the same value for its key and value here, so that an array [value, value] is returned.

The Math.SQRT1_2 static data property represents the square root of 1/2, which is approximately 0.707.

The Math.LN10 static data property represents the natural logarithm of 10, approximately 2.302.

The Promise[@@species] static accessor property returns the constructor used to construct return values from promise methods.

The Atomics.exchange() static method exchanges 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 between the read of the old value and the write of the new value.

The Atomics.load() static method returns a value at a given position in the array.

The Object.defineProperties() static method defines new or modifies existing properties directly on an object, returning the object.

The Reflect.get() static method is like the property accessor syntax, but as a function.

The Number.MIN_SAFE_INTEGER static data property represents the minimum safe integer in JavaScript, or -(253 - 1).