Implementation of single Linked List Data Structure

The LinkedList class represents a custom implementation of a singly linked list data structure in JavaScript. It provides methods to perform various operations on the linked list, such as adding elements to the end or beginning, removing elements from the end or beginning, accessing elements by index, updating elements, inserting elements at a specific index, and reversing the linked list.

The linked list is a linear data structure consisting of nodes, where each node contains a value and a reference to the next node. The example demonstrates how to create an instance of the LinkedList class and perform basic linked list operations on it.