JavaScript Masterclass - Zero to Job-Ready with Hands-On Projects - Classes (Add/Remove) / 051

This lecture covers the manipulation of classes in JavaScript, including adding, removing, and toggling classes. It provides practical examples of changing class states, such as active and inactive, and explains the importance of sequence in class manipulation. The lecture concludes with an introduction to the toggle method, which simplifies adding or removing classes based on their current state.

How does the 'querySelector' method work in selecting elements?

Explain the importance of storing elements when manipulating classes.

In what scenarios would you want to use the 'toggle' method?

What happens if you try to add a class that already exists on an element?