Can you have a look on how the web ui does the typing indicator animation? I really need an engineer to know what is happening there, why is it animating an svg

Can you have a look on how the web ui does the typing indicator animation? I really need an engineer to know what is happening there, why is it animating an svg in the dom by looping in Javascript, instead of just using a gif? This is destroying the battery by pegging a cpu core on firefox. At least this has been the case last time I checked. And there is no way to disable the animation.