The [Symbol.toPrimitive]() method of Date instances returns a primitive value representing this date. It may either be a string or a number, depending on the hint given.

The Object.getPrototypeOf() static method returns the prototype (i.e., the value of the internal [[Prototype]] property) of the specified object.

The Object.create() static method creates a new object, using an existing object as the prototype of the newly created object.

The concat() method of String values concatenates the string arguments to this string and returns a new string.

The Object.getOwnPropertyDescriptor() static method returns an object describing the configuration of a specific property on a given object (that is, one directly present on an object and not in the object's prototype chain). The object returned is mutable but mutating it has no effect on the original property's configuration.

The indexOf() method of Array instances returns the first index at which a given element can be found in the array, or -1 if it is not present.

The toString() method of BigInt values returns a string representing the specified BigInt value. The trailing "n" is not part of the string.

The flood-opacity attribute indicates the opacity value to use across the current filter primitive subregion.

A WeakRef object lets you hold a weak reference to another object, without preventing that object from getting garbage-collected.

A WeakSet is a collection of garbage-collectable values, including objects and non-registered symbols. A value in the WeakSet may only occur once. It is unique in the WeakSet's collection.