Array.prototype.reverse()

The reversed array.

The reverse method transposes the elements of the calling array object in place, mutating the array, and returning a reference to the array.

reverse is intentionally generic; this method can be called or applied to objects resembling arrays. Objects which do not contain a length property reflecting the last in a series of consecutive, zero-based numerical properties may not behave in any meaningful manner.

The following example creates an array items, containing three elements, then reverses the array. The call to reverse() returns a reference to the reversed array items.

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

items.reverse();
console.log(items); // [3, 2, 1]

The following example creates an array-like object obj, containing three elements and a length property, then reverses the array-like object. The call to reverse() returns a reference to the reversed array-like object obj.

const obj = {0: 1, 1: 2, 2: 3, length: 3};
console.log(obj); // {0: 1, 1: 2, 2: 3, length: 3}

Array.prototype.reverse.call(obj); //same syntax for using apply()
console.log(obj); // {0: 3, 1: 2, 2: 1, length: 3}

• Array.prototype.join()
• Array.prototype.sort()
• TypedArray.prototype.reverse()