Modern Web Design with HTML5, CSS3, and JavaScript - Updating the Element Attributes Using JavaScript DOM

The video tutorial covers how to create and manipulate list items in HTML using JavaScript. It explains how to select list items, retrieve and set their attributes, and handle class manipulations. The tutorial demonstrates using loops to iterate through elements, applying conditions to update classes, and ensuring the integrity of existing attributes. The video concludes with a preview of further attribute manipulation techniques.

What is the first step in selecting list items using the document?

How can you check if the selected list items have attributes?

What method is used to retrieve the attributes of an element?

Explain the process of adding a new class to list items.

What happens when you set a class value that already exists?

Describe how to conditionally update the class of list items.

What is the significance of checking for existing class values before updating?