title: How to know what JavaScript or jquery use in the some specific part of the website or html page?
body: <p>I am watching invisionapp website some time ago and i like his website animation, now i want to apply that animation in my html page so, that i am try to find how it's work. </p>
  
  <p>But i am not able to find out how that animation work and which javascripts used by devloper for apply that html page svg animation.(I am asking about invisionapp's website svg animation not invisionapp animation). i am also try by saving web page in local but not work. </p>
  
  <p>if any one know how all that animation work or what js they use then help me to understand that animation.<a href="https://i.stack.imgur.com/FX6sZ.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/FX6sZ.jpg" alt="Here is the image for what i say[][1]"></a>
  <a href="https://www.invisionapp.com/feature/freehand" rel="nofollow noreferrer">Here is the link for invisionapp website</a></p>