how to add and remove class in javascript

adding and removing classes in javascript is a common task when working with the document object model (dom). classes allow you to apply styling and behavior to elements on a web page.

### adding a class:
to add a class to an element in javascript, you can use the `classlist` property of the element. here's how you can add a class to an element:

### removing a class:
to remove a class from an element in javascript, you can use the `classlist` property as well. here's how you can remove a class from an element:

### example:
here's a complete example that demonstrates how to add and remove classes from an element:

in this example, we first add a class `highlight` to the `div` element with the id `myelement`. after 2 seconds, we remove the class `highlight` from the element.

by using the `classlist` property and its methods, you can easily add and remove classes from elements in javascript, allowing you to dynamically change the styling and behavior of your web page.

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