Animating svg in Vivus via file upload?

Question

JavaScript

I'm trying to animate svg through file upload using Vivus.js. To do this, you need to do some manipulations. I found only this information in the dock - Link to the SVG to animate. If set, Vivus will create an object tag and append it to the DOM element given to the constructor. Be careful, use the onReady callback before playing with the Vivus instance.
There is an object wrapper for svg.
What should be written in the callback?