Web components provide a powerful way to create reusable and encapsulated custom elements for web development. One of the key components of web components is custom elements. Custom elements allow you to define your own HTML tags with their own behavior and functionality.

With custom elements, you can create new HTML elements that encapsulate your desired functionality. For example, let's say you want to create a custom button element with some specific styling and functionality. You can define a custom element called 'my-button', and then use it in your HTML by simply writing .

To define a custom element, you need to extend the 'HTMLElement' class. Here's an example: