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

The Symbol.toPrimitive static data property represents the well-known symbol Symbol.toPrimitive. All type coercion algorithms look up this symbol on objects for the method that accepts a preferred type and returns a primitive representation of the object, before falling back to using the object's valueOf() and toString() methods.

The find() method of Array instances returns the first element in the provided array that satisfies the provided testing function. If no values satisfy the testing function, undefined is returned.

The Object.groupBy() static method groups the elements of a given iterable according to the string values returned by a provided callback function. The returned object has separate properties for each group, containing arrays with the elements in the group.

The Object.getOwnPropertySymbols() static method returns an array of all symbol properties found directly upon a given object.

The Object.getOwnPropertyDescriptors() static method returns all own property descriptors of a given object.

The Object.isFrozen() static method determines if an object is frozen.

The Object.preventExtensions() static method prevents new properties from ever being added to an object (i.e., prevents future extensions to the object). It also prevents the object's prototype from being re-assigned.

Forms a slice from a pointer range.

An item returned by the `Utf8Chunks` iterator.