React Js Array Unshift() Method

How can you add an element to the beginning of an array in React.js using the unshift() method?

The code snippet demonstrates the usage of the unshift() method in React.js to add an element to the beginning of an array.

1. Initially, the array myArray contains three elements: 'apple', 'banana', and 'cherry'.
2. The addItemToBeginning function creates a copy of the original array using the spread operator (...).
3. The unshift() method is then used on the copied array to add the element 'orange' at the beginning.
4. The setMyArray function updates the state with the modified array.
5. The rendered output displays the array elements in an unordered list, and a button triggers the addItemToBeginning function.

How can multiple elements be inserted at the beginning of an array in React.js using the unshift() method?

The unshift() method in React.js is not explicitly used in the provided code. However, the code demonstrates how to insert multiple elements at the beginning of an array in React.js. The insertElements() function creates a new array by combining the elementsToInsert array and the existing array state using the spread operator (...). This new array is then set as the updated state using the setArray() function. When the "Insert Elements" button is clicked, the updated array is rendered as a list on the web page.