Transition breaking on each?

xxxxxxxxxx
 
<!DOCTYPE html>
<html>
  <head>
    <script type="text/javascript" src="https://cdn.jsdelivr.net/npm/d3@2.10.3/d3.v2.js"></script>
  </head>
  <body>
    <script type="text/javascript" src="trans.js"></script>
  </body>
</html>
    

Modified http://mbostock.github.com/d3/d3.js to a secure url

https://mbostock.github.com/d3/d3.js