<div class="scale">Hover to Scale With CSS</div>
<div class="scale-js">Hover to Scale With JS</div>
div {
    width: 100px;
    height: 100px;
    background-color: orange;
    margin: 20px;
}

.scale:hover {
    transform: scale(1.5);
}
const box = document.querySelector('.scale-js');
box.addEventListener('mouseover', function() {
    this.style.transform = 'scale(1.5)';
});
box.addEventListener('mouseout', function() {
    this.style.transform = 'scale(1)';
});

External CSS

This Pen doesn't use any external CSS resources.

External JavaScript

This Pen doesn't use any external JavaScript resources.