Yes, JavaScript arrays are dynamic, meaning that their length can change dynamically during runtime. This is one of the key features of JavaScript arrays that makes them powerful and versatile data structures.
In JavaScript, you can add or remove elements from an array using a variety of built-in methods. For example, you can use the push() method to add an element to the end of an array, the pop() method to remove the last element from an array, the shift() method to remove the first element from an array, or the splice() method to remove elements from or add elements to any position in an array.
In conclusion, JavaScript arrays are dynamic data structures that allow you to add or remove elements from the array during runtime. This makes them a powerful tool for working with collections of data in JavaScript.