how can i add or remove a class in element in vue using ternary operator suppose there might be some existing classes already which will be static

To add or remove a class in an element in Vue using a ternary operator, you can use the :class binding. Here's an example:

<div :class="{'existing-class': true, 'new-class': isActive}">
  <!-- content -->
</div>

In this example, the existing-class is a static class that is always present on the element. The new-class class will be added to the element only when the isActive data property is truthy.

To remove a class using a ternary operator, you can use the negation operator ! to reverse the truthiness of a data property. For example, to remove the new-class when isActive is falsy, you can do:

<div :class="{'existing-class': true, 'new-class': !isActive}">
  <!-- content -->
</div>

This will remove the new-class from the element when isActive is falsy