unshift()

The unshift() method adds one or more elements to the beginning of an array and returns its new length. It works similarly to push(), but modifies the start of the array instead of the end. Here’s an example:

let numbers = [2, 3];
let newLength = numbers.unshift(1);
console.log(numbers); // [1, 2, 3]
console.log(newLength); // 3

In this example, we use unshift() to add the number 1 to the beginning of the numbers array. The method returns the new length of the array, which is 3.