Unshift Method - This method adds the new elements to the beginning of an array. See the Pen JavaScript: Add items in a blank array and display the items - array-ex-13 by w3resource (@w3resource) on CodePen. Arrays are a special type of objects. While an element removed from an array then array size must be decreased and if an element added to an array then array size becomes increased. Code:

You can click the button to add a new subject mathematics in the subjects array.