How do I animate a plus into an X?

Name: Studio Simpatico
Address: 4540 Center Blvd, Long Island City, NY, 11109, USA
Telephone: 347-692-8267
Price range: $$$

We can achieve animating a plus into an X through very simple CSS rotation.

.dropdown-container .dropdown-button span::after {
    transition: transform .5s;
}
 
.dropdown-container.active .dropdown-button span::after {
    transform: rotate(45deg);
}

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