The Intl.DisplayNames object enables the consistent translation of language, region and script display names.

The Array.fromAsync() static method creates a new, shallow-copied Array instance from an async iterable, iterable, or array-like object.

The entries() method of Array instances returns a new array iterator object that contains the key/value pairs for each index in the array.

The findLast() method of Array instances iterates the array in reverse order and returns the value of the first element that satisfies the provided testing function. If no elements satisfy the testing function, undefined is returned.

The shift() method of Array instances removes the first element from an array and returns that removed element. This method changes the length of the array.

The Uint8Array() constructor creates Uint8Array objects. The contents are initialized to 0.

The toLocaleString() method of Number values returns a string with a language-sensitive representation of this number. In implementations with Intl.NumberFormat API support, this method simply calls Intl.NumberFormat.

In this example, we use XHTML, SVG, JavaScript, and the DOM to animate a swarm of "motes". These motes are governed by two simple principles. First, each mote tries to move towards the mouse cursor, and second each mote tries to move away from the average mote position. Combined, we get this very natural-looking behavior.

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

The Float64Array() constructor creates Float64Array objects. The contents are initialized to 0.