how to add and remove class in javascript

here's a step-by-step tutorial on how to add and remove classes in javascript:

1. **adding a class to an element:**

2. **removing a class from an element:**

3. **toggle a class on an element:**
you can also toggle a class on an element, meaning if the class is present, it will be removed, and if it's not present, it will be added.

by using these methods, you can dynamically add or remove classes on html elements in javascript, which allows you to change the appearance or behavior of elements based on user interactions or other events.

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