None.

A new array containing the elements in reversed order.

ThetoReversed() method transposes the elements of the calling array object in reverse order and returns a new array.

When used onsparse arrays, thetoReversed() method iterates empty slots as if they have the valueundefined.

ThetoReversed() method isgeneric. It only expects thethis value to have alength property and integer-keyed properties.

The following example creates an arrayitems, containing three elements, then creates a new array that's the reverse ofitems. Theitems array remains unchanged.

const items = [1, 2, 3];console.log(items); // [1, 2, 3]const reversedItems = items.toReversed();console.log(reversedItems); // [3, 2, 1]console.log(items); // [1, 2, 3]

The return value oftoReversed() is never sparse. Empty slots becomeundefined in the returned array.

console.log([1, , 3].toReversed()); // [3, undefined, 1]console.log([1, , 3, 4].toReversed()); // [4, 3, undefined, 1]

ThetoReversed() method reads thelength property ofthis. It then visits each property having an integer key betweenlength - 1 and0 in descending order, adding the value of the current property to the end of the array to be returned.

const arrayLike = {  length: 3,  unrelated: "foo",  2: 4,};console.log(Array.prototype.toReversed.call(arrayLike));// [4, undefined, undefined]// The '0' and '1' indices are not present so they become undefined

• Polyfill ofArray.prototype.toReversed incore-js
• es-shims polyfill ofArray.prototype.toReversed
• Indexed collections guide
• Array.prototype.reverse()
• Array.prototype.toSorted()
• Array.prototype.toSpliced()
• Array.prototype.with()
• TypedArray.prototype.toReversed()