getElementsByClassNameclassNames
The `getElementsByClassName` method is a fundamental JavaScript function used to retrieve a collection of elements from an HTML document that have a specific class name. It is a part of the Document Object Model (DOM) API. When you call `getElementsByClassName` on an element or the document itself, you provide a string containing one or more class names. The method then searches the document or the specified element's descendants for all elements that possess all of the specified class names.
The result of `getElementsByClassName` is an HTMLCollection, which is a live, array-like object. "Live" means that
The `classNames` argument to `getElementsByClassName` can be a single class name or a space-separated string of