Array.prototype.reverse()

The reverse() method reverses an array in place. The first array element becomes the last, and the last array element becomes the first.

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()