What methods are available for adding an element to an array?

In JavaScript (Frontend), there are several methods to add an element to an array:

• push(element) — adds the element to the end of the array.
• unshift(element) — adds the element to the beginning of the array.
• splice(index, 0, element) — inserts the element at the specified position.

Example:

let arr = [1, 2, 3];
arr.push(4);       // [1, 2, 3, 4]
arr.unshift(0);    // [0, 1, 2, 3, 4]
arr.splice(2, 0, 1.5); // [0, 1, 1.5, 2, 3, 4]

You can also use the spread operator to create a new array with an added element:

let newArr = [...arr, 5];