If you animate scale, it's going to animate the content of the div too.
If you animate height or width it's a huge performance bottleneck
var options = {
iterations: Infinity,
iterationStart: 0,
delay: 0,
endDelay: 0,
direction: 'alternate',
duration: 700,
fill: 'forwards',
easing: 'ease-out',
}
element.animate(keyframes, options);