Setup gsap with plugins on codesandbox gatsby template?

[vader1359]

Hello, I'm trying to set up the trial Greensock plugins on codesandbox within gatsby, but it does not work.
Usually, what gsap requires is to add this url https://s3-us-west-2.amazonaws.com/s.cdpn.io/16327/MorphSVGPlugin3.min.js to html with the script tag and register it, it should be fine. However, I can't find any way to do that in gatsby on codesandbox. Here are a few things that I've tried.

• Add the URL to the External URL session
• Add it as a script with react-helmet
• Edit the gatsby-ssr.js
• Edit the html.js
  Still I cannot register the plugin. I also ask this on the gsap forum (https://greensock.com/forums/topic/25933-run-trial-gsap-plugins-on-codesandbox/) and they also do not know why the link does not work.
  Here is the codesandbox link: (https://codesandbox.io/s/testgreensock-11cr1?file=/src/pages/index.js)
  Can you guys help?