The map() method of TypedArray instances creates a new typed array populated with the results of calling a provided function on every element in the calling typed array. This method has the same algorithm as Array.prototype.map().

The toLocaleString() method of TypedArray instances returns a string representing the elements of the typed array. The elements are converted to strings using their toLocaleString methods and these strings are separated by a locale-specific string (such as a comma ","). This method has the same algorithm as Array.prototype.toLocaleString().

The length accessor property of TypedArray instances returns the length (in elements) of this typed array.

The TypedArray.of() static method creates a new typed array from a variable number of arguments. This method is nearly the same as Array.of().

The filter() method of TypedArray instances creates a copy of a portion of a given typed array, filtered down to just the elements from the given typed array that pass the test implemented by the provided function. This method has the same algorithm as Array.prototype.filter().

The InternalError() constructor creates InternalError objects.

The Symbol.hasInstance static data property represents the well-known symbol Symbol.hasInstance. The instanceof operator looks up this symbol on its right-hand operand for the method used to determine if the constructor object recognizes an object as its instance.

The endsWith() method of String values determines whether a string ends with the characters of this string, returning true or false as appropriate.

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

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.